Final Programme FRACT'4. Hassiba Benbouali University of

Faculty of Technology & The Laboratories CTSM, LRM, LPTPM and LME, UHBChlef

Organize THE FOURTH INTERNATIONAL CONFERENCE ON FRACTURE MECHANICS AND ENERGY "Trends on Fracture and Environment"

November 26-29, 2018, Chlef,

FINAL PROGRAM

November 2018

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WELCOME TO CHLEF

Hassiba Benbouali University of Chlef by image

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Final Programme FRACT'4. HISTORY OF HASSIBA BENBOUALI

January 1938 – 9 October 1957) was a militant in the Algerian 18) (ﺣﺳﯾﺑﺔ ﺑن ﺑوﻋﻠﻲ :Hassiba Ben Bouali (Arabic independence war (1954–62).

She was born in El-Asnam, Algeria.[1] Her parents moved to in 1947, where she studied at the Lycée Delacroix (high-school). She joined the Scout Movement, and her travels made her aware of the conditions of the Algerian people under the colonial government. This motivated her to join the Union générale des étudiants musulmans algériens (General Union of Algerian Muslim Students) in 1954, at the age of 16. She participated in the nationalist struggle until her death. In the 1957 Battle of Algiers, she and three companions including Ali Ammar (aka ) were killed when French forces bombed their hideout in the Casbah.

Benbouali was depicted in the movie by Italian director Gillo Pontecorvo. One of the largest avenues in Algiers and the University of Chlef were named after her.

Born Hassiba Ben Bouali 18 January 1938 El-Asnam, Algeria Died 9 October 1957 (aged 19) Casbah, Algiers, Algeria

Alma mater University of Algiers

Organization Armée de Libération

Nationale (ALN)

Known for Battle of Algiers Movement Front de Libération Nationale

(FLN)

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SUPPORTED BY

ORGANIZED BY

LPTPM LRM LCEMSM LME

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SPONSORING

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WELCOME MESSAGE

FRACT'4, 2018 THE FOURTH INTERNATIONAL CONFERENCE ON

FRACTURE MECHANICS,"TRENDS ON THE FRACTURE AND ENVIRONMENT" CHLEF, ALGERIA, NOVEMBER 26- 29, 2018

Dear Colleague, It is my great pleasure to invite you to attend the Fourth International Conference on Fracture Mechanics, FRACT'4, 2018 ,"Trends on the Fracture and environment", to be held in Chlef University, Algeria, from November 26-29, 2018. The FRACT'4-2018 intends to be a forum for discussion of the present and future trends in experimental, analytical and numerical fracture mechanics, fatigue, structural integrity assessment, failure analysis, and other important topics in the field. 4th edition of FRACT'4 conference is supported by the International community, Journals, and it provides an opportunity for scientists, researchers and engineers from cademia and industry to get acquainted with fundamental aspects of fracture mechanics and recent trends in practical applications of fatigue and fracture models, which will be presented by leading researchers and experts in the field. Authors of selected papers presented at FRACT'4-2018 will be invited to submit extended versions for publication in peer reviewed Special Issues of supporting journals. We believe that you will greatly enjoy this scientific event as well as the Algerian culture, cuisine and hospitality.

Sincerely,

FRACT'4 -2018 Conference Chairs.

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OBJECTIVES OF FRACT’4

The objective of the Fourth International Conference on Fracture Mechanics "FRACT'4" will be focus on the "Trends on Fracture & environment" coorganized by the laboratories CTSM, LRM, LPTPM and LME and the faculty of technology of the Hassiba Benbouali University of Chlef, is to discuss the present status of the

Applied mechanics based constitutive simulation, Reohology and modelling of materials and associated experimental observations methods. Such approaches allow a better understanding of how the material microstructure, environment and loadings affect degradation and failure mechanisms. Physicsbased models are also necessary for extrapolation of data beyond operational experience and for correctly predicting the transferability between specimen tests and real components.

The structural integrity and functioning of Physical components is affected by initial defects as well as by time dependent degradation mechanisms such as creep, fatigue, stress-corrosion, irradiation embrittlement and thermal ageing. The modelling and understanding of degradation mechanisms and the predictability of failure loads is constantly evolving. Recently, we have seen a trend towards physics-based models that simulate the degradation and failure processes and mechanisms that operate at different length and time scales. Such approaches allow us to make better prediction of long-term performance and safety margins, transferability between specimens and components.

This event will give an overview of the different physics-based models, simulations and the experimental studies for theoretical phenomena and materials. The emphasis will be on the meso-scale, corresponding to grains, which is the relevant length-scale for many basic material properties and degradation mechanisms. Associated experimental studies and the multi-scale models from dislocation to phenomenological macro-scale studies are in the scope of the Conference. The Conference is also an opportunity for scientists and engineers from Algerians Master, Phd Students, Maghreb countries Communities and EU Member States to discuss research activities that could be a basis for future collaborations. Springer will be the supporting journal of the conference where all reviewed and accepted conference papers will be published in special issue "Engineering Applied Fracture Mechanics and Environment". Authors of selected papers will be invited to submit extended versions for publication.

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CONFERENCE TOPICS

 Fatigue, Fracture and environment  CFD, Heat transfert, Renewable energy

 Criteria of Fracture and Failure  Residual Stresses

 Failure Analysis  Fracture and Fatigue in Applied Biomechanics

 Materials domain and Rheology Domain  Microstructurally Short Cracks

 Fluids Mechanics  Damage and Micromechanics

 Damage and Micromechanics  Extended Finite Elements Methods and their Application

 Corrosion, Environmentally Assisted  Reliability and Integrity of Engineering Cracking and Corrosion Fatigue Structures

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COMMITTEES . ORGANIZING COMMITTEE SCIENTIFIC COMMITTEE Chairman's & Members Chairman's Ali Khelil Hamou Zahloul M. Hadj Meliani, Algeria G. Pluvinage, M.Meriem Benziane M. Hadj Meliani L. Milovic, Serbia M. Tahar Abbes Guy Pluvinage Members Members Donka Angelova, Bulgaria Bassam Gamal Nasser Muthanna Francesco Lacoviella, Italy Ljubica Milovic Richard Clegg, Australia Zitouni Azari, France Hebbal Brahim Lajos Borbas, Hungary Zijah Burzi, Serbia Omsalem Abdellah Katia Casavola, Italy Ouagued Malika Sveto Cvektovski, Macedonia Amara Mouna Ghabriout Boudjemaa, Algeria Khadraoui Abdelkader Naser Merah, KSA Zidane Brahime Dražan Kozak, Croatia Paolo Lazzarin, Italy Soudani Mohamed Mersida Manjgo, Bosnia and Herzegovina Merym Bengalia Amel Liviu Marșavina, Romania Benyoucef Djillali Yury Matvienko, Russia Nasri Abdelaziz Carmine Pappalettere, Italy Braikia Mohamed Zeljko Bozic, Croatia Dahamni Salim Zoran Radaković, Serbia Nechad Said Marko Rakin, Serbia Bedrouni Mohammed Ivan Samardžić, Croatia Dekkiche Ahmed László Tóth, Hungary Naji Hassan, France Benbrik Mohamed Cetin Sonsino, Germany Ghouaoula Abdelhamid pruncu-catalin, UK Zerrout Amar Sorin Vlase, Romania Bouhamidi Youcef Tomaž Vuherer, Slovenia Madaoui Zakaria Milorad Zrilić, Serbia Hadj Miloud Mohamed Larbi Loukarfi, Algeria Benhamou Abdsoufi Jesus Toribio , Spain Haboub Sid Ahmed Daha Taoufik Boukharouba, Algeria Belahcene Abdelhak Chaoui Kamel, Algeria Mendes Mohamed Madjid Merieme Benziane, Algeria Mayas Saeed Abdelwahab Ali Khelil, Algeria Habib Allah Med Vall Taoufik Tamine, Algeria Mahmoudi Nourdine, Algeria Mends Mohamed, Algeria Zidane Brahim, Algeria Aid Abdelkrim, Algeria Abdelmoumen Guedri, Hamou Zahloul, Algeria Fares Chahinez, Algeria Belouchrani Mohamed el Amine, Algeria Fodil Hammadi, Algeria Khaled El-Miloudi, Algeria Abdelkader Oulhadj, Algeria Abdelakader Hocine, Algeria Adda Bedia El Abbes, Algeria Abderezek Elhoud, Lybia Mohamed Benarous, Algeria Mustpaha Allouti, Algeria Tahar Nateche, Algeria Mahmoudi Hacène, Algeria Abdelah Ouagued, Algeria Hamza Samir , Tunisia Hadj Taieb Tunisia Ahmed Abbadi, Morocco

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PLENARY LECTURES .

Prof. Guy PLUVINAGE Professor in the Mechanical Engineering University of Metz, France

Tel: +33 619891590 E-mail:[email protected] Plenary lecture title: ‘’Design and maintenance of pipe network transporting hydrogen pure orblending with natural gas’’

Prof. Dr. TÓTH László . Scientific Advisor Bay Zoltán Nonprofit Ltd. for Applied Research Engineering Division (BAY-ENG)

H-3519 Miskolc, Iglói út 2. Tel: +36-30/932-2690 E-mail: [email protected] Plenary lecture title: « ‘’Risk based methodology applications, special regarding to oil- and gas industry’’

Prof. YuryMatvienko . Professor, Vice Director, Mechanical Engineering Research Institute of the RussianAcademy of Sciences, 4 M. Kharitonievsky Per., 101990 Moscow, Russia Tel: +007-495-1351204 E-mail: [email protected] Plenary lecture title ‘’A Crack in the Residual Stress Field under Fatigue Loading’’

Prof. Nour-Eddine Fellague , structural engineer, USA Tel: E-mail: [email protected] Plenary lecture title: Vehicle crash safety using FEA analysis and regulations

Dr. Abdelkader KHERRAT . Senior Engineer Senior Engineer , Bombardier aerospace - Canada Tel: E-mail: Plenary lecture title ‘’ Initiation à la tolérance à l’endommagement et son application à l’industrie aéronautique’’

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Final Programme FRACT'4. Pr. Hassene NAJI . Professor, CFD - France University of Artois & University of Lille,Northern France, Laboratory of Civil Engineering and Geo-environment Tel: E-mail: [email protected] Plenary lecture title:experimental characterization and numerical simulation of Phase-Change Impure Material (PCIM) via the thermal lattice Boltzmann method (TLBM) and finite volume method

Prof. dr. sc. Željko Božic . UNIVERSITY OF ZAGREB Faculty of Mechanical Engineering and Naval Architecture Department of Aeronautical Engineering Ivana Lucica 5, 10000 Zagreb, Croatia Tel: E-mail: [email protected] Plenary lecture title: Fatigue crack propagation modelling in Thin walled structures

Pr. Donka Angelova Bulgarian Academy of Sciences. Sofia, Bulgaria. E-mail: Plenary lecture title: Influence of microstructure on fatigue crack propagation in a low carbon steel. Data presentation and modeling.

Pr. Ljubica Milovic University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11120 Belgrade, Serbia. E-mail: [email protected] Plenary lecture title: Estimation of residual strength of a crack- containing welded pressure vessel exposed to a subzero operating temperature

Pr. Abdelkader Hocine Professor, Algeria Hassiba benbouali University of chlef. E-mail: [email protected] Plenary lecture title: University governance and territorial development

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Final Programme FRACT'4. Pr. Miloud Tahar Abbes . Professor, Algeria Hassiba benbouali University of chlef. E-mail: [email protected] Plenary lecture title: Fundamentals of finite element method

Pr. Madjid MERIEM-BENZIANE . Professor, Algeria Hassiba benbouali University of chlef. Tel: E-mail: [email protected] Plenary lecture title ‘’ "Rheology of complex fluids"’’

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PUBLICATIONS

The extended abstracts will be published on electronic media with an ISBN number. The extended abstracts are not compulsory. Authors of selected extended abstracts will be invited to submit extended versions for publication in peer reviewed special issues in the following journals:

Engineering Failure Fracture and Structural Analysis Integrity ( Frattura ed publishes research Integrit à Strutturale ) papers describing the is the International analysis of engineering Journal of the Italian failures and related Group of Fracture ( studies. citated by Scopus) (ISSN Impact Factor: 2.157 1971-8993). https://www.journals.elsevie Email: r.com/engineering-failure- [email protected]

analysis m

Journal of Pipeline Pipeline Science and Engineering (has been Technology (PST) accepted by the Scopus) http://www.pipeline- ISSN 1475 4584 science.com/index.php/PS T » http://j-pipe-eng.com/ »

Nature & Technology Scientific Journal devoted Structural Integrity and to sciences of nature, life Life ( in the Scopus base) and technology / Revue ISSN 1451-3749 scientifique dédiée aux sciences de la nature, de la (štampano izdanje) vie et de la technologie. (printed edition) ISSN 2437-0312 EISSN 1820-7863 (Online) http://www.univ- http://divk.inovacionicent

chlef.dz/RevueNatec/index.

ar.rs/ivk/home.html » html

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VENUE TO CHLEF Chlef, the capital of Chlef Province, is located in the north of Algeria 200 kilometres west of the capital Algiers. It is home to the Hassiba Ben Bouali university, and the basilica of Saint Reparatus, which is home to the oldest Christian labyrinth in the world and the site of the Roman citadel, Castellum Tingitanum, was known as Al-Asnam (Arabic for "sculptures") for an area of 600 by 300 meters(2,000 by 980 feet) containg many statues.

During the Roman times, the chlef Province of Algeria was named Castellum Tingitanum. For the French, the old Roman site was the ideal location to construct a military out post in 1843, which they named Orleansville. It was also the reason that one of the oldest churches in Africa came to be located here. No-one could predict that in 1954, the first earthquake would strike Orleansville, and that it was only a taste of what was to come. Together with celebrating the independence of Algeria in 1964, the city also celebrated the birth of a new name - El Asnam.

In 1980 disaster struck again, with a 8 earthquake hitting the city and surrounding areas, in which half the city was destroyed and approximately five thousand locals lost their lives. To distance the city and the province from this unthinkable tragedy, it was renamed for a last time to chlef in 1981. Today, visitors will still be able to visit what remains of the Castellum Tingiranum (roman citadel), referred to as Al Asnam. It is a fascinating site as it contains a staggering number of statues. It is also home to the world’s most ancient Christian labyrinths, Saint Reparatus. But mostly, visitors will see endless agricultural landscapes which include dairy farms, fruit orchards and fields filled with barley and wheat. The city is also known for its processing facilities and leather products. Chlef is easy to find and travel to, as it is a vital point on both the rail and road routes that run between and Algiers.

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HISTORY OF FRACT The Congress FRACT was founded in 2011 by the " Laboratory for Theoretical Physics and Materials Physics in the University of Hassiba Benbouali of Chlef," (Algeria) as a biannual meeting.

Fract'1. The Scientific Committee Fract'1. Pleanary Lecture, Prof. G. Pluvinage, France

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Fract'2. Some pictures on the reception, opening ceremony and the Social Programme

Fract’3 . 23-25 November 2015.

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ACCOMODATION There are a number of hotels of different categories, close to the Conference Venue. The reception and other accommodations will be in La Vallée Hotel**** . website : La Vallée Hotel****

Social Programme In the 29th of November the Organizing committee proposed a full funny day for our visitors. This will be a journey to many different traditional places in addition to a social traditional meal. The places we will visit are:

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Final Programme FRACT'4. Cultural Program During the conference days the organizing committee proposes a Cultural event. This will show the traditions and the variety of Algerian culture of different regions.

As you Know

The Registration Desk will be located at the Reception on La Vallée hotel**** (lv-hotel.e-monsite.com) on Monday, November 26th from 14h:00 -22h:00 , and will be open the Conference on the Conference day (Tuesday, November 27th) in the central library of Hassiba Benbouali University of Chlef, at 08h:30 For informations, the registration fee cover only the admission to all conference session, workshops and commercial exhibition, the conference bag including relevant material, lunches (27,28) November 2018 and the Conference banquet on the 26 november at the La vallée Hotel. The Algerian PhD students and Other partcipants, who need a reservation on the Vallée Hotel, have to confirm it by filling out the registartion form sent to each participant. For the others, they should pay all the hotel nights of their staying in Chlef. As contribution, we made a deal with the La Vallée Hotel and El-Hadef Hotel, near the Center of Chlef for special price. Official Receipts (Invoices) will be given to delegates upon their arrival at the Conference on the Registration Desk. The Poster format should be A0. Can you make some schedule for trains or other transportation (Bejaia, Skikda, Tebessa, Annaba, ...) to Chlef.

All the directions will come soon on the final programme.  Weather November in Chlef is cloudy and/or sometimes running. The average daily temperature is about 18°C, with lows of around 10°C. It is an ideal time for tourists to enjoy the beautiful sites of Chlef.

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Final Programme FRACT'4. Technical Program Preliminary Program Schedule. All the Conferences will be take place at the Central library on the Hassiba Benbouali University of chlef, Hay Es-salem. For more information, please look up on the Map. 26 27 November 28 November 29 November November

8 :30 - Opening Ceremony 9 :00 Presidential Honor Lecture

& & Plenary Lectures

9 :00 - Opening Honor Lecture 10 :10 10:10 - 10:30 Coffee Break Plenary Lectures — Plenary 10:30 - Session I Lectures Plenary Lectures 11 :10 +

Plenary Lectures & & Session II

11:30 - Topic 13 :30 Topic C session A +B Open session Coffee Break and Touristic Tour Welcome Special Lunch In Chlef 12 :30 - + Lunch Time Exhibition 13 :30 13 :30 -14 :00 & Special Beach lunch Plenary Plenary Lectures Plenary Lectures 14 :00-14 :40 Lectures (Session & (Session C) A+B) Topic A+B 14 :40 15 :30 Reception of Deleguation Coffee Break

15 :40-16 :00 + Coffee Break

16 :00-16 :40 Poster Session C

Opening Poster 16:40 - Ceremony Session A+B 17 :30 (Hotel La Valée) Exhibition in Chlef city 17 :00 -19 : 00 Meeting Cooperation Cloture Ceremony 19 :00 –

20 :30 Lunch- Hotel La Vallée- The FRACT4 Secretariat reserves the right of changing any session in the final program Changes to the program will be published in the website on a regular basis.

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Workshop

Two workshop will be organized on the marge of the conference. They provides an opportunity for young scientists, researchers and engineers from academy and industry to get acquainted with fundamental aspects of fracture mechanics, simulation and recent trends in practical applications of fatigue and fracture models, and advanced approaches such as multiscale materials modeling. Workshop 1. Fatigue and Fracture Modeling and Analysis of Materials and Components (Dr. Mohammed Hadj Meliani, LPTPM, Hassiba benbouali university of Chlef) The Workshop provides an opportunity for young scientists, researchers and engineers from academy and industry to get acquainted with fundamental aspects of fracture mechanics, recent trends in practical applications of fatigue and fracture models, and advanced approaches such as multiscale materials modeling. Senior researchers and experts will give lectures on experimental and numerical techniques for modeling, analysis and assessment of damaged components and structures. Particular attention will be given to determining and analysis of crack extension in pipes, where the standard and new methods will be examined. Examples on multiscale modeling used in analyzing pipeline steel weldments, metal/ceramic interfaces and fatigue problems will be given. Models for fatigue crack growth prediction and remaining fatigue life assessment will be presented. workshop 2. Mechanics Simulation and CFD applications. (Dr. Abdellah Benarous, Dr. Ali Khelil, LCTMSM, Hassiba benbouali university of Chlef).

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Technical Programme FRACT'4 Conference Central Library, UHBchlef

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Tuesday, November27th, 2018. Central Library, UHBChlef 08:00 – 08:30 Registration 08: 30–09:00 Plenary 1: Risk based methodology applications, special regarding to oil- and gas industry

Pr. Lazlo Toth, Scientific Advisor, Bay Zoltán University, Hungary E-mail:[email protected]

09 :00–09 :30 Plenary 2 : Estimation of residual strength of a crack- containing welded pressure vessel exposed to a subzero operating temperature

Pr. Ljubica Milovic, University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11120 Belgrade, Serbia [email protected]

09:30– 10:00 Coffee Break , Session I: Session II: Session III: Oral Sessions Failure Analysis and Corrosion and Energy and its Integrity Environment Applications

Oral Session I : Failure Analysis and Integrity (FAI) .

Chairs : Prof. Ljubica Milovic, Prof. Zeljko Bozic, Prof. Yury Matvienko Central Library, UHBChlef. 10:00 – 10:30 Keynote Lecture : Fundamentals of Finite Element Method

Pr. Miloud Tahar Abbes Laboratory LME, Hassiba benbouali University of chlef. [email protected]

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Final Programme FRACT'4. Oral Presentation, Session I : Failure Analysis and Integrity (FAI) 10:30–10 :45 O1 FAI : Experimental and numerical investigation of UIC 54 rail degradation A. BELALIA, Y. KAMLA, M. AMARA, A. EL AZIZI, Z. AZARI Hassiba Benbouali University, Chlef, Algeria

10:45–11 :00 O2 FAI : Damage of the Bone-Cement Interface T. Bousnane, S. Benbarek, A. Sahli University of Sidi Bel Abbes, Sidi Bel Abbes, Algeria

11:00–11 :15 O3 FAI : Experimental and numerical analysis of a stress field in the vicinity of a crack and determination of the stress intensity factor in mode I M. Beldi, A. BILEK, S. Djebali, K. Bouguerouma, T. Cherfi Mouloud Mammeri University, Tizi-Ouzou, Algeria 11:15–11 :30 O4 FAI : A mechanical response of functionally graded nanoscale beam with porosities for Critical buckling A. Benahmed, BouazzaFAHSI ,Abdelouahed TOUNSI, AbdelnourBenzair, Mohamed ZIDOUR. University of Sidi Bel Abbes, Sidi Bel Abbes, Algeria

11:30–11:45 O5 FAI : Optimization Parameters for Circumferentially Welded Pipes A. Mahdjour, A. El-Azzizi, M. Hadj-Meliani , Tahar Nateche University of Sciences and Technology of Oran Mohamed Boudiaf, Oran, Algeria. 11:45–12:00 O6 FAI : Elasto-Plastic Analysis for Notched Plates repaired by Stop Drilled-hole using the Volumetric Approach WN. Bouzitouna, W. Ooudad. Belhadj Bouchaib University Center, Sidi Bel Abess, Algeria

Session II : Corrosion and Environment (CE)

Chairs : Prof. Donka Angelova, Prof. Laszlo Toth, Prof. Nouredine Fellague Place : e-learning Room 1, Laboratory Hall 10:00 – 10:30 Keynote Lecture : NDT BUSINESS IN ALGERIA: Services et R&D Dr. Ahmed YAMANI YAMANI Institute of TECHNOLOGY, Zeralda, Algeria

Oral Participants; Session II : Corrosion & Environment (CE)

10:30–10 :45 O1CE : Electrochemical preparation of a conducting polymer thin layer on a quartz crystal microbalance in an ionic liquid Boualem Mettai, Ahmed Mekki, Soumia Kouadri Moustefai, Wissam Kermouche, Hanen Lagha, Fateh Merdj, Abderrezak Abdi, Hassiba Ben Bouali University, Chlef, Algeria.

10:45–11 :00 O2CE: Effect of welding parameters on corrosion in gas tungsten arc welding (GTAW) austenitic stainless steel (304l) weldment Kessal Belkacem Amine, Chahinez Fares Hassiba Ben Bouali University, Chlef, Algeria. 11:00–11 :15 O3CE: Effect of green inhibitors on the mechanical properties degradation for pipe steel in acid media M. Soudani, B.G.N. Muthanna, H. Boukortt, K. El-Miloudi, M.Hadj Meliani

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Final Programme FRACT'4. LPTPM, Hassiba Ben Bouali University of Chlef, Algeria 11:15–11 :30 O4CE : Effects of the parameters of corrosive environment on the reliability of an AISI 304 structure R. Boutelidja, A. Guedri, M.A. Belyamna, B. Merzoug Souk Ahras University, Souk Ahras, Algeria

11:30–11 :45 O5CE :Interpretation of the effect of the hydrostatic test in gas and oil pipeline A. Guedri, M.A. Belyamna Souk Ahras University, Souk Ahras, Algeria

11:45–12 :00 O6CE: Experimental analysis of internal pipe elbow steel erosion-corrosion Bassam Gamal Nasser Muthanna, Madjid Meriem-Benziane, Mohammed Hadj Meliani, Boualem Mettai LRM, Hassiba Ben Bouali University of Chlef, Algeria

Oral Participants; Session III : Energy and its Applications (EA)

Chairs : Prof. Naji Hassan, Prof. Ali Kheli, Prof. Larbi Loukarfi Place :.e-learning Room 2, Laboratory Hall 10:00 – 10:30 Keynote Lecture: Rheology of complex fluids

Pr. Madjid Meriem-Benziane LRM, Hassiba benbouali University of chlef, Algeria [email protected]

Oral Participants; Session III : Energy and its Applications (EA)

10:30–10 :45 O1EA :Numerical simulation of a low turbulent flow around square cylinder with a modi-fied V2F turbulence model A. Mokhtar Didouche, A. Benarous Hassiba Ben Bouali University, LCEMSM, Chlef, Algeria 10:45–11 :00 O2EA: The Choice of the Appropriate Solar Radiation Model for the Site of Laghouat D. Bensahal, A. Yousfi, F. Chabane, M. Rahmani, University of Mohamed Khieder, Biskra, Algeria. 11:00–11 :15 O3EA: Interaction of Surface Radiation with Free Convection in a Vertical Cylindrical Annular Cavity Mohamed amine medebber, Belkacem OULD SAID, Noureddine RETIEL, abderrahmaneAissa Abdelhamid Ibn Badis University, Mostaganem, Algeria 11:15–11 :30 O4EA : Thermal Analysis of enhanced Receiver Tube of Parabolic Trough Collector Using Ring Inserts M.R. Haddouche, A. Benazza University of Djillali Liabes , Sidi Bel-Abbes, Algeria. 11:30-11:45 O5EA: A comparative study of fluid flow past in cylindrical and cubic staggered tube bundle M. BEDROUNI, A. KHELIL University Hassiba Benbouali, LCEMSM, Chlef, Algeria

12:00 – 14:00 Lunch Time

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Oral Presentation, Session I : Failiure Analsis and Integrity (FAI)

Chairs : Prof. Ljubica Milovic, Prof. Zeljko Bozic, Prof. Yury Matvienko Central Library, UHBChlef.

14:00 – 14:30 Keynote Lecture: Vehicle crash safety using FEA analysis and regulations

Prof. Nour-Eddine Fellague

structural engineer, USA

Oral Presentation, Session I : Failiure Analsis and Integrity (FAI)

14:30–14 :45 O7FAI :Numerical modelling in friction lap joining of Aluminium alloy and carbon-fiber-reinforced- plastic sheets N. Mahmoudi, M. Medbeur University Dr. Moulay Taher, Saida, Algérie 14:45–15 :00 O8FAI :Deformation analysis of the tensile test sample using digital image correlation (DIC) A. MAATI, S. Belaid, P. Balland, L. Tabourot Amar Telidji University, Laghouat , Algeria 15:00–15 :15 O9FAI :Tribological study of Al-Si and Ti-W-N multilayer thin films deposited on stainless steel K. CHEMAA, S. Hassani, M. Gaceb University center, Medea, Algeria 15:15–15 :30 O10FAI :Optimization and reliability approaches of a cam mechanism H. Ferhat, A. Hammoudi ,F. Djeddou Institute of Optics and Precision Mechanics, Setif -1- University, Algeria O11FAI: Effect of the elastic-plastic behavior models on the GTN damage parameters 15: 30-15:45 identifications M. Hadj Miloud, I. Zidane, M. Mendas Hassiba Benbouali University, Chlef, Algeria O12FAI:Experimental and numerical study of bending behavior for honeycomb sandwich panel 15:45--16:00 A.Oubouzid, B.Keskes, Y.Fizi Ferhat Abbas University Setif-1-, Setif, Algeria.

26 Hassiba Benbouali University of Chlef http://www.univ-chlef.dz/fract4/

Final Programme FRACT'4. Oral Participants ; Session II : Corrosion & Environment (CE)

Chairs : Prof. Laszlo Toth, Zeljko Bozic, Mohammed Hadj Meliani, Place : e-learning Room 1, Laboratory Hall 14:00 – 14:30 Keynote Lecture : Propects and problems of concentrating solar power plants (CSP)

Pr. Manuel Hurtado Gomez [email protected]

Oral Participants ; Session II : Corrosion & Environment (CE)

14:30–14 :45 O7CE: Instability effect of AuSi liquid metal alloy source-focused ion beam LMAIS-FIB on SiO2/Si nanopatterns F. Benyettoui, A. Aissat University of , Blida, Algeria. University, Medea, Algeria. 14:45–15:00 O8CE : Multiscale failure analysis of composite materials by the boundary element method A. Sahli, S. Yamani , M. Rida Seba, O. Benouis Ibn Khaldoun University of Tiaret, Algeria O9CE: Obtaining elastic-plastic and cohesive fracture parameters using a combined 15:00-15:15 experi-mental, numerical simulation and optimization method Y. Fizi, L. Kerdja, Ferhat Abbas University Setif-1-, Setif, Algeria. 15:15-15:30 O10CE: Numerical-Experimental Characterization of honeycomb sandwich panel for determining the modal parameters of the damaged structure A. Bendada, A. Chouiter, D. Boutchicha, M.Miri University of Sciences and Technology of Oran Mohamed Boudiaf, Oran, Algeria. 15:30-15:45 O11CE: Contribution to the modelling and homogenization of 3D structures in the presence of cracks by XFEM Benkhechiba Abdelfattah elhadj , Guesmia Mohammed, Hachi Brahim Elkhalil, ,Hachi Dahmane1,Moussaoui Moustapha , Djelfa, Algeria.

15:45-16:00 O12CE: Impact of the leachates of the old uncontrolled dump on the immediate environment: Case of the old rubbish dump of Tiaret commune (Ain Guesma road) B. Khatemi, Y Laidani , G. Henini , A. Fikaouni , K. Djellouli Della University of Ibn Khaldoun, Tiaret, Algeria

27 Hassiba Benbouali University of Chlef http://www.univ-chlef.dz/fract4/ Final Programme FRACT'4. Oral Participants ; Session III : Energy and Applicatios (EA)

Chairs : Prof. Miloud Tahar Abbes, Ali Khelil, Larbi Loukarfi, Abdelkader Kherrat, Nouredine Fellague e-Learning Room II . Laboratory Hall Keynote Lecture : Initiation to Damage 14:00 – 14:30 Tolerance and its application to the Aerospace Industry

Dr. Abdelkader Kherrat Senior Engineer , Bombardier aerospace - Canada

Oral Participants ; Session III : Energy and Applicatios (EA)

14:30–14 :45 O6EA :Transient Numerical Analysis of Free Convection in Cylindrical Enclosure Mohamed Amine Medebber, Sofien Mahmoudi, Belkacem ould said, Noureddine Retiel Abdelhamid Ibn Badis University, Mostaganem, Algeria 14:45–15 :00 O7EA :Regulation of the Water Jet for a Pelton Turbine Injector N. Hamdi, S.Benmansour, J.L.Kueny Laghouat University, Laghouat, Algeria 15:00–15 :15 O8EA :Estimation of Herschel-Bulkley Rheological Parameters of eco-friendly Drilling Flu-id using Genetic Algorithm H. Ouaer, M. Gareche University of M’HamedBougara of Boumerdes, Boumerdes, Algeria. 15:15–15 :30 O9EA :Thermal study of a beam and grille exchanger E 102 M A.Amraoui UniversityDjillali LIABES, Sidi-Bel-Abbès, Algeria

15:30–15 :45 O10EA :Hydrogen Production by inductively Coupled Plasma in Methane Abdelatif Gadoum, Djilali Benyoucef, and Rachid Taleb Hassiba Ben Bouali University, Chlef, Algeria

16:00– 16:20 Coffee Break

16:20--17:30 Poster session Failure Analysis and Integrity Responsable : Profs. Ljubica Milovic, Yury Matvienko, Mohammed Hadj Meliani,

P1FAI Structural Damage Zones Detection by Finite Elements M. L. MOUSSAOUI University of Sciences and Technology Houari Boumediene, Bab Ezzouar,Algeria P2FAI The femur fracture with a different cemented total hip prosthesis M.S. ZAGANE, A. BENOUIS, A. SAHLI, S. BENBAREK University of Ibn Khaldoune Tiaret, Algeria P3FAI Diagnosis of rotating machines by vibratory signal A. DELIOU, B. BOUCHOUICHA, S. BOULKROUNE, G. SLIMANI, M. CHAOUR, B. HAMADI Research Center in Industrial Technologies CRTI, Algeria

P4FAI Study of resistance to fatigue of pipeline steel weldments X70 A. DELIOU, B. BOUCHOUICHA, S. BOULKROUNE, G. SLIMANI, M. CHAOUR, B. HAMADI Research Center in Industrial Technologies CRTI, Algeria

28 Hassiba Benbouali University of Chlef http://www.univ-chlef.dz/fract4/

Final Programme FRACT'4. P5FAI Evolution of SIFs in Elliptical Cracks emanating from interface in Orthopedic Cement-implant THP A. BENOUIS , N. DJEBBAR, A. SAHLI, B. BENALI, M. E.S. ZAGANE, M. CHERFI University of saida, Algeria P6FAI Free vibration analysis of chiral double-walled carbon nanotube embedded in an elastic medium using non-local elasticity theory K.RAKRAK, M.ZIDOUR, A.CHEMI, H.AYAT University of Ibn Khaldoune, Tiaret, Algeria P7FAI The Study of Structural, Electronic ,Mechanical Properties and Transition Phases of Ruthenium Oxide N. MEHTOUGUI, D. RACHED University of DjillaliLiabes, Sidi Bel-Abbes, Algeria P8FAI Reliability of simulator driving tool for evaluation of sleepiness, fatigue and driving Performance B. SOULMANA, S. BOUKEBBAB, M.S. BOULAHLIB, Z. DAHIA Université des Frères Mentouri Constantine, Algeria P9FAI Optimization of the Preventive Maintenance of a Repairable System A Case Study A. ZAKARIA DAHIA, AHMED BELLAOUAR, BILLEL SOULEMAN Université des Frères Mentouri Constantine, Algeria P10FAI Detection and control of surface defects by the gradient approach S.TALEB, W.LEBBOU Research Center in Industrial Technologies, cheraga, Algeria P11FAI Numerical Analysis of the Biomechanical Behavior for Both Kinds of Dental Structures K.BOUZOUINA,N. DJEBBAR , R. HADJ BOULENOUAR AND B. BOUTABOUT University of Sidi Bel Abbes, Sidi Bel Abbes, Algeria P12FAI Numerical modeling on the effect of loads on the behavior of total hip prosthesis M. BENIDRIS, O. AKEL, M. BEKADDOUR BENATIA , D. CHENINE, S. CHERID Abdelhamid Ibn Badis University, Mostaganem, Algeria P13FAI Properties Electronic, Structural and Magnetic of the Intermetallic RMgSn (R: Er, Nd) ternary CeScSi-type O. AKEL, B. ABBAR, M. BEKADDOUR BENATIA, S.CHERID, M. BENIDRIS Djillali Liabès University of Sidi Bel-Abbès, Sidi Bel-Abbes, Algeria. P14FAI Numerical modelling in friction lap joining of Aluminium alloy and carbon-fiber-reinforced-plastic sheets N. MAHMOUDI , M MEDBEUR University of Dr. Moulay Taher, Saida, Algeria

P15FAI Forecast of Crack Propagation Behavior In The Total Hip Prosthesis D. CHAREF , B. SERIER, B. MECHAB AND R. AMRI University Djillali LIABES of Sidi Bel Abbes, Algeria P16FAI A new model for monitoring the behavior of non-linear elasticity of concrete by damage mechanics REBIHA SMAHI , YOUCEF BOUAFIA University Mouloud Mammeri, Tizi-Ouzou, Algeria P17FAI Electronic Properties of Two-Dimensional Nanostructures Systems Based on Lay-ered Materials OUALID CHEREF, SALAH EDDINE BENALIA, DJAMEL RACHED Djillali Liabès University of Sidi Bel-Abbes, Sidi Bel-Abbès, Algeria P18FAI First-Principles Investigation of Half-metallic Ferromagnetism Properties of DMSs Materials OUALID CHEREF, SALAH EDDINEBENALIA, DJAMEL RACHED Djillali Liabès University of Sidi Bel-Abbes, Algeria P19FAI Finite Element Modelling of Reinforced Concrete Frame using ANSYS by Discrete Reinforcement Modelling Approach M. A. BOUARROUDJ, Z. BOUDAOUD University of Larbi Ben M’hidi, Oum El Bouaghi, Algeria P20FAI Quantum Well laser’s characteristics under stress BOUABDALLAH, Z.NABI, A. OUMSALEM, B. BENICHOU University Djillali LIABES of Sidi Bel Abbés, Algeria.

P21FAI Study of the elastoplastic behavior of an HDPE pipe SAMIRA LIAMANI Djillali Liabès University of Sidi Bel-Abbès, Sidi Bel-Abbes, Algeria. 29 Hassiba Benbouali University of Chlef http://www.univ-chlef.dz/fract4/

Final Programme FRACT'4. P22FAI Numerical analysis of the prediction of the lifetime of bi-materials: typeceram-ic/metal B. ZAOUI, B. MECHAB, B. SERIER, M. BELHOUARI DjillaliLiabès University of Sidi Bel-Abbès, Sidi Bel-Abbes, Algeria. P23FAI Flexural analysis of sandwich plates using a new quasi 3D plate theory TAREK HOUARI, HABIB KHELLAFI, MOHAMMED SID AHMED HOUARI, MOHAMED BENGUEDIAB, MUSTAPHA BENDOUBA Djillali Liabès University of Sidi Bel-Abbès, Sidi Bel-Abbes, Algeria. P24FAI Porosity effect on the mechanical behavior of Functionally Graded Plates Resting on Winkler- Pasternak Foundations R. BENFERHAT, HASSAINE DAOUADJI, A. RABAHI, M.E. ZAGANE University Ibn Khaldoun, ,Tiaret, Algeria P25FAI Hydrogenation of Benzaldehyde on MCM-41 Supported Copper-Based M.SADOU, A.SAADI , M.HADJ MELIANI Laboratory of Natural Gas Chemistry, Faculty of Chemistry, University of Sciences and Technology Houari- Boumediene, P.O.Box 32, El-Alia, Bab-Ezzouar, Algiers, Algeria. P26FAI Friction Welding of AISI 316 steel : Mechanical Properties and Microstructure evolution F. ARZOUR, M. HADJ MELIANI, R. SULEIMAN, A.A.SOROUR, T. BOUKHAROUBA LPTPM, University of Chlef, LPTPM, Esalem City, 02000, Chlef, Algeria P27FAI Structural and optical properties of a glass-ceramic in a ZAS system containing W2O5 A. GRABSI, A. CHORFA University of Setif 1, The Institute of Optics and Precision Mechanics, Setif, Algeria.

P28FAI Effect of Parameter of Confinement for Specimens DCB with U-notches D. NEGGAZ, A. EL-AZZIZI M. HADJ MELIANI, T. NATECHE University of Sciences & Technology Mohamed Boudiaf, Oran , Algérie P29FAI Numerical Study Stress Intensity Factors for CTS Specimens with U-notches Of Mixed-Mode L. FODIL ,D. NEGGAZ, A. EL AZZIZI, M. HADJ MELIANI University of Sciences and Technology of Oran Mohamed Boudiaf, Oran, Algeria.

16:20--17:30 Poster session Corrosion and Environment : Responsable : Prof. Laszlo Toth, Fares Chahinez, Zeljko Bozic, Fellague Nouredine,

P1CE Inhibitive properties, thermodynamic and quantum chemical studies of pyrazolinederiva-tives on carbon steel corrosion in HCl solution. ODAY KHAMAYSA, ILHEM SELATNIA, ASSIA SID , MERZOUG BENAHMED Larbi Ben M’Hidi University. Oum El Bouaghi. Algeria

P2CE Quantum chemical and molecular dynamic simulation studies on the inhibition efficiencies of three pyrazine derivatives against corrosion of steel ILHEM SELATNIA, ODAY KHAMAYSA, ASSIA SID, MERZOUG BENAHMED Larbi Ben M’Hidi University. Oum El Bouaghi,. Algeria P3CE Anti- corrosion activity of biosurfactant produced by bacillus licheniformis K. MOKDAD, R. MEHDAOUI, F. MESBAIAH, A. BADIS University of Saàd Dahlab of Blida1, Blida, Algeria P4CE Experimental and DFT studies on the Corrosion Inhibition of Iron Metal: Application to the protection of gas and oil pipeline IZZEDDINE SAMEUT BOUHAIK Hassiba benbouali University of Chlef (UHBC) P5CE Uniaxial compression effect on corrosion behavior of aluminum wire (AA1370) YOUCEF HADJ ALI, NACER ZAZI, RABEH SLIMANI, DJAMILA KASDI, BELKACEM KORAICHI, MOHAMMED EL AMINE FAID, JEAN-PAUL CHOPART University of Mouloud Mammeri, Tizi-Ouzou, Algérie P6CE Impact of green inhibitor compared with synthetic inhibitors for pipe corrosion in 1 M HCl M. SOUDANI, A. MOSTEFAOUI, B.G.N.MUTHANNA, K. EL-MILOUDI, M. HADJ MELIANI University Hassiba Benbouali of Chlef, Chlef, Algeria.

P7CE Identification of bacteria causing bio-corrosion of the oilfield of hassi messaoued A.THABET, C. FARES, M. DOUANI, M. SEBAIHIA University Hassiba Benbouali of Chlef, Chlef, Algeria.

30 Hassiba Benbouali University of Chlef http://www.univ-chlef.dz/fract4/

Final Programme FRACT'4. P8CE THE EFFECT OF OPERATING PARAMETERS ON THE ELECTRODE DISSOLUTION AND THE DYE REMOVAL OF DYE (RED BEMACID) FROM THE INDUSTRIAL WASTE WATER K. MAAMAR, C. FARES, L. MAHMOUDI, A. DJAFER University Hassiba Benbouali of Chlef, Chlef, Algeria. P9CE Particle Impact of sand on Internal surface of steel elbow M. AMARA, M. HADJ MELIANI, B. G. N. MUTHANNA, M. TAHAR ABBES University Hassiba Benbouali of Chlef, Chlef, Algeria. P10CE A new approach based on 3D-FEM Eddy Current measurements for characterization of surface cracks HARZALLAH SALAHEDDINE , MOHAMED.CHABAAT NABILE BEN HADDA University ziane achour , djelfa, Algeria. P11CE INHIBITION EFFECT OF FLAVONOIDS EXTRACT OF RUTA CHALEPENSIS ON THE CORROSION OF API 5L X52 STEEL IN 1M HCL MEDIUM M. A BENGHALIA, C. FARES, A. KHADRAOUI, M. HADJ MELIANI, R. K. SULEIMAN, A. SOROUR, M. DMYTRAKH, Z. AZARI Hassiba Benbouali University of Chlef, Algeria P12CE Dust ion acoustic solitary waves in nonextensive complex plasma with nonthermal ions ABDERREZAK BERBRI, SMAIN YOUNSI AND KHADIDJA BENTTAYEB Hassiba Benbouali University of Chlef, Algeria 16:20--17:30 Poster session Energy and its Applications : Responsable : Prof. Naji Hassen, Loukarfi Larbi, Ali Khelil, Abdelkader Kheratt,

P1EA Numerical Investigation of Droplet Breakup With Cross-Junction Mini-ChannelUsing VOF method T. CHEKIFI Research Center in Industrial Technologies CRTI, P.O. Box 64, Cheraga Algiers, Algeria P2EA Numerical study of the influence of the impact height on the thermal and dynamic behavior of a swirling jet impacting a flat plate AMAR ZERROUT, ALI KHELIL , LARBI LOUKARFI University Hassiba Benbouali of Chlef, LCEMSM, Algeria. P3EA Dimensioning of an individual air conditioner using solar energy M.T. MOHAMMEDI, N. BELKACEM, R. AOUINE, L. LOUKARFI University HassibaBenbouali of Chlef, LCEMSM, Algeria. P4EA Study of realization of an hybrid water pumping system (photovoltaic-wind) R. SI ALI, N. BELKACEM, R. AOUINE, L. LOUKARFI University HassibaBenbouali of Chlef, LCEMSM, Algeria. P5EA Sizing of an off-grid photovoltaic installation O. HADJI, N. BELKACEM, R. AOUINE, L. LOUKARFI University HassibaBenbouali of Chlef LCEMSM, Algeria P6EA Optimization of a hybrid photovoltaic-diesel micro-grid Application to an isolated residential site in Chlef M. ARIF, N. BELKACEM, R. AOUINE, L. LOUKARFI University HassibaBenbouali of Chlef, LCEMSM, Algeria.

P7EA Impact of wall temperatures on turbulence and wind in the vicinity of the canyon B. MEDJAHED, A. BENLEFKI University of Abdelhamid Ibn Badis, ,Mostaganem, Algeria. P8EA Aerodynamic Shape Optimization of NACA0012 Profile using DesignXplorer Method ABD ELLATIF AMOR , RAMZI MDOUKI; LAARBI LOUKARFI; AHMED BETTAHAR. University HassibaBenbouali of Chlef, LCEMSM, Algeria P9EA CFD investigation and experimental analysis of Small Scale Solar Chimney Installed in Ouargla region AZIZI, T. TAHRI, M. H. SELLAMI,R. BELAKROUM, L. SEGNI University Hassiba Benbouali of Chlef, Chlef, Algeria. P10EA Elaboration and thermal behaviour of transition metal-Doped zinc sodium phosphate glasses KHARROUBI MOHAMED, KALAI CHAFIQA, MAGHNI CHERIF, BELAHCENE ABDELHAK ZianeAchour University, Djelfa, Algeria

31 Hassiba Benbouali University of Chlef http://www.univ-chlef.dz/fract4/

Final Programme FRACT'4. P11EA Synthesis and Infrared Characterization of Transition Metal-Doped Zinc Sodium Phosphate Glasses KHARROUBI MOHAMED, KALAI CHAFIQA, MAGHNI CHERIF, BELAHCENE ABDELHAK Ziane Achour University, Faculty of Exact Sciences and Informatics, BP 3117, 17000 Djelfa, Algeria P12EA Numerical simulation of wind loads on linear Fresnel concentrator H. BENDJEBBAS, M. ABBAS Centre de Développement des Energies , Renouvelables .CDER.Tipaza.Algeria. P13EA Numerical investigation of the vortex generator effect on aerodynamic performances of profile NACA 63-215 Z. LAFFANE, F. SAIDI, Y. BOUALIA, A. SEDINI, H. BENAMEUR University of Sciences and Technology, M.B. Oran, Algeria P14EA Numerical optimization of the hydrodynamic coefficients of an autonomous underwater vehicle (AUV) A. SEDINI, F. SAIDI, A. MOKHTARI University of Sciences and Technology, M.B. Oran, Algeria P15EA Contribution to the study of fluid-structure interaction phenomena - case of a heat ex-changer MALKI FAIZA, ABDELBAKI NOUREDDINE, HADJADJ AHMED ,, Algeria P16EA Study of piston thermo-elastic behavior under thermomechanical loads for a set of materials M. MECHALIKH, A. BENHAMOU, I.ZIDANE University Hassiba Benbouali of Chlef, Chlef, Algeria. P17EA Numerical prediction of the power performances of aheat pipe S. DAHAMNI, H. GUETARNI, A. BENHAMOU, A. BENAROUS University Hassiba Benbouali of Chlef, LCEMSM, Algeria P18EA Numerical study Coalescence of water droplets on simple fibers Hazourli. Hamza, Mohamed.Abdelouahab, H.Merabet, H.Aouaichia, K.Chettah, S.Ghanaia Research Center in Industrial Technologies (CRTI), P.O. Box 64, Cheraga 16014 Algiers, Algeria P19EA Growth Behavior, Relative stability and Magnetic properties of AsGeqn (n = 1-8; q = 0, ±1) clusters M. BENAIDA, K. E. AIADI, S. MAHTOUT , Ouargla, Algeria P20EA Structure Prediction and optical properties of CsSnI3 for solar Cell Applications N.CHELIL, M.SAHNOUN, H.BOUHANI-BENZIANE AND H. MOKHFI University of Mustapha Stambouli, Mascara, Algeria

P21EA Numerical Simulation of Laminar Natural Convection from a Discrete Heat Source in Horizontal Cylindrical Cavity filled with GNL B. OULD SAID, M.A. MEDEBBER, N. RETIEL , M. SENOUCI Abdelhamid Ibn Badis University, Mostaganem, Algeria 17:20 – 17:30 Selected the Best Posters for Journal publications

32 Hassiba Benbouali University of Chlef http://www.univ-chlef.dz/fract4/

Final Programme FRACT'4.

Wednesday, November 28th, 2018. Central Library, UHBChlef

08:00 – 08:30 Registration 8:30 – 09:30 Honor Lectures, 08: 30–09 :00 Plenary 3 : A Crack in the Residual Stress Field under Fatigue Loading

Pr. Yury .G. Matvienko, Mechanical Engineering Research Institute of the Russian Academy of Sciences, 4 M. Kharitonievsky Per., 101990 Moscow, Russia. e-mail: [email protected]

Plenary 4: Influence of microstructure on fatigue 09: 00–09 :30 crack propagation in a low carbon steel. Data presentation and modeling.

Pr. Donka Angelova Bulgarian Academy of Sciences. Sofia, Bulgaria.

09:30– 10:00 Coffee Break, Session I: Session IV: Oral Sessions Failure Analysis and Composite Materials Integrity Oral Session I : Failure Analysis and Integrity (FAI) .

Chairs : Prof. Ljubica Milovic, Prof. Zeljko Bozic, Prof. Yury Matvienko Central Library, UHBChlef. 10:00 – 10:30 Keynote Lecture: Experimental characterization and numerical simulation of Phase-Change Impure Material (PCIM) via the thermal lattice Boltzmann method (TLBM) and finite volume method (FV).

Pr. Hassene Naji University of Artois, France.

33 Hassiba Benbouali University of Chlef http://www.univ-chlef.dz/fract4/

Final Programme FRACT'4.

Oral Presentation, Session I : Failure Analysis and Integrity (FAI) . 10:30–10 :45 O13FAI :Wear Behvior of steel coating obtained by thermal flame spraying Toufik MANA University of Bejaia, Bejaia, Algeria 10:45–11:00 O14FAI :Numerical Study of Artificial Periodontal Ligament Effect on Stresses Reduction in Bone- Dental Implant Interface A. Merdji, A. Benaissa, R. Hillstrom, L. Aminallah, N. Della, S. O.M. Mukdadi Mascara University, Mascara, Algeria 11:00-11:15 O15FAI: ANN Approach to Predict the Flow Stress of CMn (Nb-Ti-V) Micro Alloyed Steel Based on Compression Tests H. Allaoui, A. Guedri, L. Darsouni, A. Darsouni Badji Mokhtar University, Annaba, Algeria. 11:15–11 :30 O16FAI: Dynamic analysis of nonlinear pipeline resting on Winkler-Pasternack foundation via Monte Carlo method M.Seguini, D.Nedjar University of Sciences and Technology of Oran Mohamed Boudiaf, Oran, Algeria 11:30–11:45 O17FAI: The Interaction of Waves with a Double Perforated Walls Breakwater Y. Boualia ,N.Chioukh,B.Hamoudi,Z.Laffane University of Sciences and Technology of Oran Mohamed Boudiaf, Oran, Algeria 11:45–12:00 O18FAI: Variation of Residual Stresses of Thermal Origin in Ceram-Metallic Copper -Alumina (Cu / Al2O3) BENKRAMA Nasreddine , MILOUDI Abdelkader University Mustapha STAMBOULI, Mascara, Algeria

Oral Participants ; Session IV : Composite Materials (CM)

Chairs : Prof. Donka Angelova, Prof. Lazlo Toth, Prof. Nouredine Fellague Place : e-learning Room 1, Laboratory Hall

10:30–10 :45 O1CM : Effects of shear deformation on buckling of laminated composite beams M. Sahla, H.Youzra, H.Saidi University of Sidi Bel abess, Sidi Bel abess, Algeria O2CM: Reliability model of laminated composite plate with finite element method 10:45–11 :00 A. maizia, H. Abdelkader , H. Dehmous Hassiba Benbouali University of Chlef, Algeria 11:00–11 :15 O3CM: Fatigue Crack Propagation in repaired composite Patch H. Benzaama, A. Benchiha, M. Bentoumi and A. Benzaama Ecole Nationale Polytechnique d'Oran, Oran, Algeria 11:15–11 :30 O4CM : Analysis of the presence of bonding defects on the fracture behavior of a damaged plate re-paired by composite patch N.Kaddouri, K. Madani ,M.A.Bellali, S. Djabbar University of Sidi Bel Abbes, , Sidi Bel Abbes, Algeria 11:30–11 :45 O5CM : Evaluation of impact damage in glass/epoxy composite tube laminate A. Ghouaoula, A.Hocine, A.Maizia.,Z.Azari ,M.Hadjmeliani Hassiba Ben Bouali University, Chlef, Algeria. 11:45-12:00 O6CM: Evaluation of pipeline elbow steels deformation at critical zones Madjid Meriem-Benziane, Bassam Gamal Nasser Muthanna, Ibrahim Gadi, Khelifa Belhadj-Mokhtar LRM, Hassiba Ben Bouali University of Chlef, Algeria.

12:00 – 14:00 Lunch Time 34 Hassiba Benbouali University of Chlef http://www.univ-chlef.dz/fract4/

Final Programme FRACT'4.

14:00--15:00 Poster sessions (FAI+CM). Responsable : Profs. Ljubica Milovic, Lszlo Toth, Fares Chahinez, Yury Matvienko

P30FAI Biomechanical Analysis of the Impact Effect on the Stress Level in the Elements of Dental Prosthesis N. DJEBBAR, A. BENOUIS , K. BOUZOUINA, R. HADJ BOULENOUAR AND B. BOUTABOUT University of HassibaBenbouali, Chlef, Algeria P31FAI Arid environment impact on automotive paints adherence in scratch test: Influence of tip type Z. MADAOUI, M. MENDAS, H. ZAHLOUL, M. ABBADENI HassibaBenbouali University of Chlef, Algeria. P32FAI Experimental characterization of the metal sheet DC06EK used for sheet metal forming of sanitary products in the EIMS A. BELGUEBLI, I. ZIDANE, A. BENHAMOU, F. CHERCHEL Hassiba Benbouali University of Chlef, Algeria. P33FAI Analytical investigation of a three-pad hydrostatic squeeze film damper compensated with electrorheological valve restrictors M. BENADDA MOHAMED, M. AHMED BOUZIDANE, MLLE. ASMA ABED, M. ABOUBAKEUR BENARIBA University of Tiaret, Tiaret, Algeria P34FAI Effect of crack shape factor on structural reliability of cracked pipeline-parametric study A. GUILLAL, N. ABDELBAKI, M.E.A. BENSGHIER, M. BETAYEB University of M’hamedBougara, Boumerdès, Algérie P35FAI Study of contact parameters in 3D fretting-fatigue F. HAMADOUCHE, H. BENZAAMA, M.TAHAR ABBAS National polytechnic school, Oran, Algeria P36FAI Critically Evaluating Mechanics of Structure Genome-Based Micromechanics Approach M. HAMDI, R. ZENASNI, M. A. KHIAT , Mostaganem, Algeria P37FAI Performance Analysis of the electrical characteristic in the short channel n- MOSFET transistor N. BOURAHLA, B. HADRI, A. BOURAHLA University of Abd Elhamid Ibn Badis, ECP3M, Site II, 27000 Mostaganem. Algeria P38FAI Study and development of an expert system based on neural networks for the diagnosis of bearing defects S. DJABALLAH, K. MEFTAH , M.TEDJINI Hassiba Benbouali University of Chlef, Algeria. P39FAI Size effect of alumina abrasives on surface roughness of optical glass during mechanical polishing process FAROUQ ABBAS, NABIL BELKHIR University Ferhat Abbas, Setif 1, Algeria. P40FAI Relationship between ceria particles aggregation and sub-surface damage of optical glass during the CMP polishing process Farouq Abbas, Nabil Belkhir University Ferhat Abbas, Setif 1, Algeria. P41FAI Verification of Fractal Distribution of Granular Grain Mixtures for Self-Compacting Concrete A. NAIMI, K. CHOUICHA University of Sciences & Technology Mohamed Boudiaf, Oran ,Algérie

35 Hassiba Benbouali University of Chlef http://www.univ-chlef.dz/fract4/

Final Programme FRACT'4. First principles study of structural,electronic and magnetic properties of New Heusler Alloys Rh2MnZ(Z=Al, In) P42FAI R. NOURINE, A. BENAMARA Hassiba Benbouali University of Chlef, Algeria. P43FAI Proposition of a method for calculating the equivalent stress intensity factor for inclined defect M.A. MOUTASSEM, A. A. ELAZIZI, M. HADJ MELIANI University of Science and Technology - Mohamed Boudiaf ,ElMnaouar, Oran, Algeria. P44FAI NUMERICAL ANALYSIS OF MIXED BEAMS STEEL-CONCRETE SIMPLY SUPPORTED: STUDY OF THE SLAB-PROFILE INTERFACE M.A. MOUTASSEM, A. SAHLI, L. NOURINE University of Science and Technology - Mohamed Boudiaf ,ElMnaouar, Oran, Algeria. P45FAI First-principles study on the Structural, Elastic and Electronic,Properties of BaThO3 Cubic Perovskite S. MOKRANE, H. BOUAFIA, B. ABIDRI, H. MOUSSA Universiyt of Ibn Khaldoun .Tiare, Algeria. P46FAI the static analysis of the masonry walls under lateral and compressive loads LAIB SALAHEDDINE ,ATAILIA SARA, ,MEFTAH SID AHMED University of Sidi-Bel-Abbe, Sidi-Bel-Abbes, Algeria P47FAI The effect of plastic deformation of the metal joint on crack propagation in bi-materials MOURAD CHAMA AND BELAÏD MECHAB University DjillaliLiabes of Sidi Bel Abbes, Sidi Bel Abbes, Algeria P48FAI Structural and Electronic properties of BaTiO3: DFT Investigation H. MOUSSA , A. BOUAZZA,H. BOUAFIA,B. SAHLI, S.MOKRANE University Ibn Khaldoun .Tiaret, Algeria. P49FAI The Design of the Machines by the Flow Lines Method M. BEKADDOUR BENATIA, F. BEKKOUCHE, O. AKEL, S.CHERID, M. BENIDRIS University Djillali Liabès, Sidi Bel Abbès,Algeria P50FAI First-principles investigation of Structural, Elastic, Electronic and Magnetic Properties of full-Heusler Alloys Cu2MnZ (Z=Si, Al, Sn) H. BOUCHENAFA, B. BENICHOU, B. BOUABDALLAH, Z. NABI, A. OUMSALEM Hassiba Benbouali University of Chlef, Algeria. P51FAI Optimal operating characteristics of a GaN/Al0.8Ga0.2N quantum dot laser H. BOUCHENAFA, B. BENICHOU, B. BOUABDALLAH, A.OUMSALEM Hassiba Benbouali University of Chlef, Algeria P52FAI Crack Path Predictions in Keyhole CT Specimen Using the MTS and MATS Approaches Chlef O. BOULEDROUA , B. G. N. MUTHANNA, M. HASSANI, D. ZELMATI, S. KHADRAOUI Hassiba Benbouali University of Chlef, Algeria. P53FAI Experimental investigation on pipe crack repaired by welding BASSAM GAMAL NASSER MUTHANNA, MADJID MERIEM-BENZIANE,IBRAHIM GADI, WALID AZZOUZ-RACHED Hassiba Benbouali University of Chlef, Algeria. P54FAI Numerical study of crack in the critical zones of the plug valve IBRAHIM GADI, MADJID MERIEM-BENZIANE, BASSAM GAMAL NASSER MUTHANNA Hassiba Benbouali University of Chlef, Algeria. P55FAI Theoretical study of halide perovskites CsAuI3 N. MOKHEFI, O. SAHNOUN, N.CHELIL, H. RIANE University of Mascara, LPQ3M, Mascara, Algeria. P56FAI Stability of a two component bose-einstein condensate in quasi-one dimensional geometries S.MIRAOUI, A.HOCINE and M.BENAROUS Hassiba Benbouali University of Chlef, Algeria.

36 Hassiba Benbouali University of Chlef http://www.univ-chlef.dz/fract4/

Final Programme FRACT'4. P57FAI Inverse Full Heussler‘s Alloy : Ag2LaB Properties C. METAOUI, M. AMERI Sidi Bel Abbes University, ALGERIA. P58FAI Contribution to study the structural, elastic, mechanical and electronic properties of Strontium filled skutterudite SrOs4Sb12 MALIKA AMARI Sidi Bel Abbes University, ALGERIA. P59FAI Inhomogeneous plate based on nonlocal viscoelasticity theory S. HAMZI, I. MECHAB University of Mustapha Stambouli, LSTE ,Mascara, Algeria

P60FAI: Study of the reliability of a pipe on the basis of the approach PENT L. ALIMI, K. CHAOUI Research Center in Industrial Technologies CRTI, Cheraga, Algeria P61FAI : Numerical analysis of the effect of the pore-crack interaction on stress intensity in spot welds WN. BENALA, WN. BOUAFIA Belhadj Bouchaib University Center, Sidi Bel Abess, Algeria P62FAI Characterization of joints HDPE welded by FSW LATEF M, ZAHLOUL H ,BADIDI BOUDA A, MEBTOUCHE A , ABBASE A Hassiba Benbouali University of Chlef, Algeria P63FAI Identification of Johnson-cook material model constants and numerical modelling of Charpy impact test L. KERDJA, Y. FIZI Ferhat Abbas University Setif-1-, Setif, Algeria P64FAI Critical buckling load of chiral double-walled carbon nanotube Embedded in an elastic medium A.CHEMI, K.RAKRAK, M.ZIDOUR University of Sidi Bel Abbes, Sidi Bel Abbes, Algeria

P1CM Effect of Environmental Conditions on the Resistance of Damaged Composite Materials M.A. KHIAT, R. ZENASNI, M. HAMEDI University of Mostaganem, Mostaganem, Algeria. P2CM Three-dimensional numerical analysis of a bonded joint based on epoxy/SiO2nanocomposite adhesive HADJ BOULENOUAR RACHID, N. DJEBBAR, K. BOUZOUINA AND B.BOUTABOUT1 University of Sidi Bel Abbes, Sidi Bel Abbes, Algeria P3CM Stress distribution analysis in a composite / composite type single-joint joint effect of fiber orientation S.CH. DJEBBAR, K. MADANI, M.A.BELLALI, N.KADDOURI Laboratoire Mécanique Physique des Matériaux (LMPM), Université de Sidi Bel Abbes, Algérie P4CM Defects of forming processes and induced properties on the compositelaminate B. KACIMI, F. TEKLAL, A. DJEBBAR University of Mouloud MAMMERI, TiziOuzou, Algeria. P5CM Numerical analysis of the effect of the dimensions of the composite patch on the fracture behavior of a damaged and repaired plate; optimization by experience plan A. BELLALI, N. KADDOURI; M. MOKHTARI, K. MADANI University djillali liabes, Sidi Bel Abbes, Algeria

37 Hassiba Benbouali University of Chlef http://www.univ-chlef.dz/fract4/

Final Programme FRACT'4. Elaboration and characterization of the mechanical behavior of an epoxy glass composite material P6CM A. GHOUAOULA, A.VEFFA University Hassiba Benbouali, Chlef, Algeria

P7CM Mechanical and chemical behaviour of a composite material produced by uniaxial compression of a mixture of aluminium and alumina powders S. DEHRIB, N. ZAZI, J.P. CHROPART University of Tizi- Ouzou, Mouloud Mammeri BP17RP, Tizi- Ouzou, Algeria P8CM Macro scale modelisation of Chip formation in FRP composite machining DJ. DJILALISALAH, M. MENDAS , M. HADJ MILOUD University HassibaBenbouali, Chlef, Algeria P9CM Numerical model for repair patch optimization of 2024-T3 aluminum structures cracked in mixed mode under tensile loading

N.DEGHOUL, L. ERROUANE, Z. SEREIR University of Sciences and Technology of Oran Mohamed Boudiaf, Oran, Algeria

14:00--15:00 Poster session Energy and its Applications : Responsable : Prof. Naji Hassen, Loukarfi Larbi, Ali Khelil, Abdelkader Kheratt,

P22EA University of Sciences & Technology Mohamed Boudiaf, Oran ,Algérie

Large-Eddy Simulation of Turbulent Jet Issued From Lobed Diffuser S. NECHAD, A. KHELIL, A. BENNIA, L. LOUKARFI University Hassiba Benbouali LCEMSM , Algeria P23EA Improvement of heat transfer by the interaction of a swirling jet impinging Y. BOUHAMIDI, A. KHELIL, M. BRAIKIA , S.NECHAD, L. LOUKARFI University Hassiba Benbouali, LCEMSM , Algeria P24EA Thermal characterization of a multi jet diffuser with lobes imbalances in temperature M. BRAIKIA, A. KHELIL, L. LOUKARFI, H. NAJI University Hassiba Benbouali, LCEMSM , Algeria P25EA An experimental investigation of interacting swirling multiple jets M. BRAIKIA, A. KHELIL, L. LOUKARFI, H. NAJI University Hassiba Benbouali, LCEMSM , Algeria P26EA Numerical simulation of a flow past a cubic and cylindrical tube by the large scale simulation method (LES) A.KHELIL, M. BADROUNI , M. BRAIKIA , I. BACHIR, A. ZERROUT University Hassiba Benbouali, Chlef, LCEMSM , Algeria P27EA FIRE PROTECTION DURABILITY OF INTUMESCENT COATINGS AFTER ACCELERATED AGING R. THABET, A. BENAROUS, L. MESQUITA University Hassiba Benbouali, Chlef, LCEMSM , Algeria P28EA Dynamic study of multiple jet with lobed diffusers W. MEDAOUAR, M. BRAIKIA, L. LOUKARFI, A. KHELIL, H, NAJI University Hassiba Benbouali, Chlef, LCEMSM, Algeria P29EA Pressure distribution analysis of plain journal bearing under hydrodynamic lubrication A. GHALEM, M. TAHAR ABBES, A.SAHLI University Hassiba Benbouali, Chlef, Algeria P30EA Study of the performance of the hydrodynamic bearing Mayas Saeed Abdullah ABDELWAHAB, Miloud TAHAR ABBES, Bassam Gamal Nasser MUTHANNA University Hassiba Benbouali, Chlef, Algeria P31EA Study of Synthetic Jet flow fields using Numerical Simulation Z. ELKHALDI, L. ADJLOUT, O. IMINE, P. DANČOVÁ ,AND T.VÍT University of Sciences and Technology, M.B. Oran, Algeria

38 Hassiba Benbouali University of Chlef http://www.univ-chlef.dz/fract4/

Final Programme FRACT'4. Variational Approach of two component BOSS-EINSTAIN CONDENSATE P32EA A. MEHEDI and M. BENAROUS University Hassiba Benbouali, Chlef, Algeria P33EA Piston skirt profile and tribological performance analysis of piston-cylinder in elastohydrodynamic lubrication M. BENBRIK, M. TAHARABBÈS, P. MASPEYROT, M.AMARA, A. DEKKICHE University Hassiba Benbouali, Chlef, Algeria P34EA Numerical simulation of fluid-structure interaction of a wind blade turbine M.S. BELGHOULA, A. BENHAMOU, Z. MADAOUI, A.BELAHCENE University Hassiba Benbouali, Chlef, Algeria P35EA Complementarity Algorithm For Solving Cavitation In Hydrodynamic Lubrication Of Piston Skirt Of Internal Combustion Engine M. S. ABDELKADER, B. ABDSOUFI, T. A. MILOUD University Hassiba Benbouali, Chlef, Algeria P36EA BEC dark matter halos in the effect of local condensate depletion A.LABADI, M.BENAROUS University Hassiba Benbouali, Chlef, Algeria P37EA Solitonic solutions of Coupled nonlinear Schrodinger equation and Rogue wave structures H. BELKROUKRA, H. CHAACHOUA-SAMEUT AND M. BENAROUS University Hassiba Benbouali, Chlef, Algeria P38EA EXPERIMENTAL THERMAL STUDY OF A FREE LOBED JET WITH FIVE LOBES A. BENNIA, H. FELLOUAH, A. KHELIL, S. Nechad, L. LOUKARFI University Hassiba Benbouali, LCEMSM, Chlef, Algeria P39EA NUMERICAL THERMAL STUDY OF A FREE LOBED JET WITH FIVE LOBES A. BENNIA, L. LOUKARFI, A. KHELIL, S.NECHAD and H. FELLOUAH University Hassiba Benbouali, LCEMSM, Chlef, Algeria P40EA Optimize fouling time during pretreatment process for seawater desalination A. ADDA, S.HANINI, M.ABBAS Unit of Solar Equipments Development-UDES/EPST CDER, Tipaza, Algeria P41EA Effect of Rushton blade number and his spacing on the hydrodynamic and the Agitation Power Y. KAMLA, H. ABEDESSALAM, M.CHACHI ET H. AMEUR , A. BELALIA University Hassiba Benbouali, Chlef, Algeria P42EA Comparison of conventional and hydromechanical deep drawing process M. ABBADENI , I. Zidane, H. Zahloul, Z. MADAOUI University Hassiba Benbouali, Chlef, Algeria P43EA Analysis of convective heat transfer rate in internal combustion engine using Hohenberg's correlation B. MENACER, M. BOUCHETARA University of Sciences and the Technology of Oran, Algeria P44 EA Numerical prediction of sheet cavitation around a hydrofoil SAADIA ADJALI, MUSTAPHA BELKADI Laboratory of Aero-Hydrodynamics Naval, P.O. 1505 El-Mnaouar Oran, Algeria P45 EA Solar Hydrogen Production by Mg-Cl Thermocemical Cycle in the Algerian Desert MALIKA OUAGUED University of Chlef, LPTPM, Esalem City, 02000, Chlef, Algeria. P46 EA Impact of the leachates of the old uncontrolled dump on the immediate environment: Case of the old rubbish dump of Tiaret commune (Ain Guesma road) B. KHATEMI, Y LAIDANI , G. HENINI, A. FIKAOUNI , K. DJELLOULI DELLA University of Ibn Khaldoun, Tiaret, 14000, Tiaret, Algeria. Pomegranate Skin and Date Pedicels as a new biosorbents to remove of textile dye (Yellow bemacid) from aqueous solutions: Equilibrium, kinetics, modeling and thermodynamics P47 EA G. HENINI , Y. LAIDANI , A. FEKAOUNI, K. DJELLOULI DELLA , M. AMARA University of Chlef, LVCWE, P.O. Box.151, Esalem City, 02000, Chlef, Algeria P48 EA Characterization and study of chemical deposits of Nickel-phosphorus on ordinary steel A33 KARIMA CHOUCHANE, ATHMANI DJAMILA,RAZIKA MEHDAOUI, A KHADRAOUI, NADIR MESRATI 39 Hassiba Benbouali University of Chlef http://www.univ-chlef.dz/fract4/

Final Programme FRACT'4. Djilali Bounaama University,SNV-ST Faculty , Khemis--ALGERIA

P49EA Adsorption of proteins at solid surfaces. A. BOUHEKKA University of Chlef, Department of Physics, 02000, Chlef, Algeria. P50EA Binary mixture of dipolar gases AHMED HOCINE, MOHAMED BENAROUS, MADANI MOHAMED LTPMP, Faculty of Exact Sciences and Informatics, Hassiba Benbouali University of Chlef, Algeria. P51EA Coupling adsorption onto Hranfa's marl and microfiltration with ceramic membranes for elimination of industrial dye (Red bemacid “ETL”) BEKHTA MAIMOUN, ABDERRAHMANE DJAFER, LAHCENE DJAFER, ANDRE AYRAL University of Chlef , Water and Environment Laboratory, Chlef, Algeria

P52EA Soliton in quasi one dimensionanl dipolar Bose Einstein condensate A.TOUZENE University of Chlef, LPTPM, Esalem City, 02000, Chlef, Algeria.

15: 00–15:30 Closing Plenary 5: Fatigue crack propagation modelling in Thin walled structures

Prof. dr. sc. Željko Božić UNIVERSITY OF ZAGREB E-mail: [email protected]

15:30–16 :00 Closing Plenary 6 : ’Design and maintenance of pipe network transporting hydrogen pure orblending with natural gas’’

Prof.Guy PLUVINAGE Author, Professor in the Mechanical Engineering University of Metz, France Tel: +33 619891590 E-mail:[email protected]

Second Day Closing

19:00 – 22:00 Closing Ceremony ( LaVallée Hotel)

Represented of the Organizing Committee, Represented of the Scientific Committee, Dean of the Faculty of Technology, Dean of the Faculty of Sciences, Vice Rector of the exterior relations and animations, Rector of the Hassiba Benbouali university of Chlef,

Thursday, November 29th, 2018 09:00 – 18:00Touristique Tour and Social Diner

40 Hassiba Benbouali University of Chlef http://www.univ-chlef.dz/fract4/

Final Programme FRACT'4.

Abstracts Oral and Poster presentations

41 Hassiba Benbouali University of Chlef http://www.univ-chlef.dz/fract4/

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

NDT BUSINESS IN ALGERIA Training, Services, and R&D

Ahmed Yamani YAMANI Institute of Technology, Villa no. 123, Extension est, Zeralda, Alger, Algeria

Abstract: In this contribution, we will explore the nondestructive testing (NDT) discipline from its multi- disciplinary nature. We will outline its presence in the Algerian market place in term of training and certification, service providers, and nature of NDT techniques used. We will lay down some NDT challenges found in the industry, and propose some research and development topics that may be the themes of some Master and PhD thesis. Finally, we will discuss the importance of industrial based research topics that can be the interface between academia and the Algerian industries.

Rheology of complex fluids

Madjid Meriem-Benziane

LRM, Mechanical Engineering Department, University of Chlef, P.B.151,Chlef02000,Algeria E-mail: [email protected] Abstract: The objective of this work is to present the relationship between the rheology field and le domain of materials which represents the interaction between liquid and solid for example crude oil -internal wall of pipeline. The rheology domain allows to study the behavior of simple or complex fluids during the flow in the pipeline taking into account more factors such as the viscosity, the flow pat- terns (laminar, transition or turbulent), the geometry of pipeline, the nature of material (ordinary, composite) of pipeline, pressure and temperature. In addition, there are three types of complex liq- uids such as Emulsions (mix two liquids), suspensions( mix liquid with small solids) and foams. Indeed, the experimental results can't prove directly classify the nature of liquids because the rhe- ometer (instrument of measure) isn't able to give the initial value of stress at the initial value of the shear rate. For this reasons, the Least Square Method is one of the among best method to determi- nate the critical stress( the initial value of stress) depending the general formula of power law and Herschel–Bulkley model. It can divide the complex liquids into two kinds of liquids: Non- Newtonian liquid without critical stress and Non-Newtonian liquid with critical stress. The know- ing of the nature of liquid helpful to avoid many problems such as the corrosion phenomenon in the critical zones as the elbow which is formed by many welding operations. In addition, the liq- uids behavior proved that the rheological aspect is important in predicting the behavior of the ma- terials. The results indicated that the nature of pipeline is significantly influenced by rheological properties of all kinds of liquids . Keywords: Rheology, Viscosity, Shear Stress, Shear rate, Non-Newtonian, Crude oil, Pipeline, Least Square Method.

Thermal Analysis of Friction Stir Welding (Fsw) --Application in Aerospace Industry-

N. Chekroun1,*, A. Noureddine2, F. Saidi3, O. Mimouni4,T. Nateche3 1Ecole nationale polytechnique d'Oran, ALGERIA 2Ecole nationale polytechnique d'Oran (La RTFM), ALGERIA 3Laboratoire d'aérohydrodynamique Naval, LAHN-USTO, ALGERIA 4Université de Blida 1, ALGERIA

Abstract: The friction welding process (F.S.W.) investigation has shown to be particularly well suited to the aluminum alloys assembly in aeronautics. A thermo-mechanical analysis of aluminum 7075- T651 during the transient and stationary phases of the process is carried out using the ANSYS finite element code. The numerical results of the temperature field inside the smooth weld plate shows a heat genera- tion during the second and third load stages due to the friction between the tool shoulder and the plate to be welded. This study aims to provide a long-term predictive tool for determining the welding pa- rameters to be used in the implementation of the method. Keywords: constraint, T -stress, Friction Stir Welding (F.S.W.), modeling, finite element analysis.

A Crack in the Residual Stress Field under Fatigue Loading

Yu.G. Matvienko Mechanical Engineering Research Institute of the Russian Academy of Sciences, 4 M. Kharitonievsky Per., 101990 Moscow, Russia

Abstract: The paper deals with determination of crack mouth opening displacements (CMOD), stress intensity factors and T-stresses for cracks emanating from cold expanded holes after low-cycle fatigue. Exper- imental results are obtained for uniaxial tension-compression fatigue loading of specimens with the force direction is perpendicular to the crack line. Experimental data provide constructing the depend- encies of fracture mechanics parameters for cracks of fixed lengths against a fatigue cycle number, which are of great interest to estimate residual stress effect on fatigue damage. The effect of welding residual stresses on surface fatigue crack propagation and fracture mechanics parameters is also discussed. To describe the mutual effect of the externally applied stress and residual stresses on the crack-tip stress field, the well-known superposition method of the principle of linear elastic fracture mechanics is used. Additionally, the crack propagation law is written in the modified form taking into account the non-singular T-stress by means of the correction function. The effect of welding residual stresses on propagation of the internal surface semicircular crack is analyzed in the case of welded joint of the pipeline.

Keywords: residual stress, constraint, fatigue surface crack, T-stress, finite element simulation.

Influence of microstructure on fatigue crack propagation in a low carbon steel. Data presenta- tion and modeling

Donka Angelova University of Chemical Technology and Metallurgy, Materials Science Center, St. Kliment Ohridski Blvd. 8, 1756 Sofia, Bul- garia [email protected]

Abstract: Fatigue in a low-carbon steel with ferrite and pearlite microstructure has been investigated at different loading condition through three groups of tests. Two of the groups include tension-tension (T-T) and rotation-bending (R-B) fatigue tests using cylindrical specimens; in both those groups microstructurally- short surface-crack propagation is monitored by acetate-foil replica technique. The third group of pure bending (P-B) fatigue tests includes flat specimens preliminary notched by Focused Ion Beam, FIB, technique. Four notches are made on a single specimen; a group of three central parallel notches located closely to each other, and one edge notch aligned with the top notch of the group of the three notches.

University governance and territorial development

Abdelkader HOCINE University of Chlef, L.E.M.S.N., Esalem City, 02000, Chlef, Algeria Email: [email protected]

Abstract: This paper focuses on the role of higher education and scientific research in the implementation of an appropriate economic development model on the one hand and on the other hand it positions its direct participation in achieving the objectives set by the National Plan of Development Territories SNAT 2030. However, for academic institutions to be efficient, it is essential to review their organizational and management mode, to ensure quality training, develop a useful research and take a dimension of so- cial responsibility. In order to achieve these objectives, the establishment of good governance has be- come one of the missions of the countries of the MENA region, where our country is a part. The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

This contribution ressence governance models adopted by several countries and the challenges of the tripartite: Government, Business and University to ensure self-sufficiency and the needs of the com- pany first, before going to competition and competitiveness at the Maghreb and Mediterranean scale. The present paper contribution provides more insight into higher education governance processes and the multi-scale recommendations to be made in order to compete on an international scale.

Keywords : Gouvernance ; Territoy ; University ; SNAT ; Developpement.

FATIGUE CRACK PROPAGATION MODELLING IN THIN WALLED STRUCTURES

Željko Božić

UNIVERSITY OF ZAGREB, Faculty of Mechanical Engineering and Naval Architecture, Department of Aeronautical Engineering, Ivana Lucica 5, 10000 Zagreb, Croatia

Abstract: Models for fatigue crack propagation simulation in thin-walled structures under cyclic loading are presented. A numerical simulation procedure for fatigue crack growth prediction based on integration of the differential equation will be explained in details. The Mode I stress intensity factor values, KI, are calculated by a FEM program (ANSYS) using extrapolation method of singular elements nodal displacement. In FEM modelling eight node quadratic isoparametric elements are used, where the re- gion surrounding a crack tip is meshed by singular elements. By using power laws such as the Paris, Elber and Schieve model, fatigue life is simulated for plate specimens damaged with a central crack and subjected to cyclic loading with a constant tensile stress range.

EXPERIMENTAL AND NUMERICAL INVESTIGATION OF UIC 54 RAIL DEGRADATION

A. BELALIA1,*, Y. KAMLA1, M. AMARA1, A. EL AZIZI2, Z. AZARI3 1Hassiba Benbouali University, LME, Esalem City, 02000, Chlef, Algeria 2Mohamed Boudiaf University, LPTPM, Esalem City, 02000, Chlef, Algeria 3National Engineering School of Metz (ENIM), LEM3, 1 route d’Ars Laquenexy BP 65820 57078 Metz cedex 3, France

Abstract: Obviously, railways are important for the economic and social development. However, the simplicity of the concept hides tribological phenomena that could be complex by the density of traffic, the weather, the instability of the ground and multiple other factors. This lead, usually, to the appearance and development of defects and damage of the rail, which is the most important elements of railway construction. In terms of quality and reliability, surface defects as squats and studs are at high risk, as they can cause derailments, breakdowns, failures of components, etc. by growing under rolling contact fatigue (RCF). Therefore, it is very important to understand these phenomena to enable appropriate strategies for the operation and maintenance of the tracks. This paper is based on a field survey of UIC 54 rail degradation supported by a numerical analysis in order to aid in the decision as to the type of maintenance that are appropriate for the operation of the railway Algiers-Oran 15 Km East of the city of Chlef

Keywords: UIC 54, rail, wheel, tribology, fatigue, RCF, wear, squat, studs, ultrasonic, aluminothermy welding.

Damage of the Bone-Cement Interface T. Bousnane, S. Benbarek,A. Sahli Department of Mechanical Engineering, University of Sidi Bel Abbes, BP 89, Cite' Ben M'hidi, Sidi Bel Abbes, 22000, Algeria Abstract:In orthopedic surgery and particularly in total hip arthroplasty, fixation of femoral implant is generally made by the surgical cement. The main purpose of this study is to investigate the effect of cement penetration into the bone on damage scenario at the interface. In this work, bone–cement interface in- tegrity has been studied for different mechanical properties. A lower strength of the bone–cement in- terface due to a lower mechanical property results in faster interface damage. So we advise surgeons to well perpetrate the bone for long-term durability of cemented THA.

Keywords: total hip replacement, finite element analysis, bone-cement interface. Experimental and numerical analysis of a stress field in the vicinity of a crack and determina- tion of the stress intensity factor in mode I M. Beldi, A. Bilek, S. Djebali, K. Bouguerouma, T. Cherfi 1 L.M.S.E Laboratory, Mechanical Engineering Department, Mouloud Mammeri University Algeria Abstract: The double refraction phenomenon of light is used to analyze a stress field developed in the vicinity of a crack tip in mode I. The isoclinic fringes and the isochromatic fringes obtained on the analyzer of a regular polariscope allowed us to determine the principal stresses directions and the stress values. The maximum shear stress along a line of the model is determined both experimentally and numerically. A simulation conducted with CASTEM allowed us to determine the stress field in the whole model. Two isochromatic loops are used to determine the stress intensity factor in the vicinity of the crack tip. Good agreements are obtained between the experimental and the numerical solution.

Keywords: birefringence, stress, isochromatic, isoclinic, stress intensity factor.

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

A mechanical response of functionally graded nanoscale beam with porosities for Critical buck- ling Abdelillah BENAHMED1,*, Bouazza FAHSI1 , Abdelouahed TOUNSI2, Abdelnour Benzair1, Mohamed ZIDOUR3.

1 Laboratory de Modélisation et simulation Multi-échaelle,Département de physique, Faculté des Science Exactes Univer- sité de sidi Bel Abbés, algeria . 2 Laboratory of Matérials et Hydrology, University of Sidi Bel Abbés, BP 89 Cité Ben M’hidi, 22000 Sidi Bel Abbés, Faculty of Technology, Civil Engineering Department, Algeria. 3Université Ibn Khaldoun, BP 78 Zaaroura, 14000 Tiaret, Civil Engineering Department, Algeria.

Abstract: This paper presents an efficient higher-order nonlocal beam theory for the Critical buckling, of func- tionally graded (FG) nanobeams with porosities that may possibly occur inside the functionally graded materials (FG) during their fabrication, the nonlocal elastic behavior is described by the differential constitutive model of Eringen. The material properties of (FG) nanobeams with porosities are assumed to vary through the thickness according to a power law. The governing equations of the functionally graded nanobeams with porosities are derived by employing Hamilton`s principle. Analytical solu- tions are presented for a simply supported FG nanobeam with porosities. The validity of this theory is studied by comparing some of the present results with other higher-order theories reported in the liter- ature, Illustrative examples are given also to show the effects of porosity volume fraction, aspect rati- os, and thickness to length ratios on the Critical buckling of the FG beams.

Keywords: nanobeam; nonlocal; higher-order; buckling; functionally graded; porosity.

Optimization Parameters for Circumferentially Welded Pipes

A. Mahdjour1,, A. El-azzizi1, M.Hadj Meliani2,Tahar Nateche1 1 University of Sciences and Technology of Oran Mohamed Boudiaf (USTO-MB), Mechanical Engineering De- partment,, El Mnaouar BP 1505, Bir El Djir 31000, Oran, Algeria. 2University of Chlef, LPTPM, Esalem City, 02000, Chlef, Algeria.

Abstract:High strength and low alloy steels are commonly used in the manufacture of tubes, which are standard- ized by the API standard for oil and gas transport systems. The high yielding limits, high tenacity at low temperatures and the smaller thicknesses, allow the use of ducts with larger diameters and sub- jected to higher internal pressures, thus increasing their efficiency in the transport of fluids. This paper deals with the identification of the best temperatures applicable to stress relief and quenching and tempering treatments that optimize mechanical properties in circumferential welded joints, through Vickers traction and Charpy impact tests with V-notch ". In addition, the specimens will be character- ized metallographically to correlate the mechanical and microstructural properties found in the differ- ent regions of the welded joint.

Keywords:welded joint, pipes, heat treatment, microhardness, metallographic.

Elasto-Plastic Analysis for Notched Plates repaired by Stop Drilled-hole using the Volumetric Approach WN. BOUZITOUNA1, W. OUDAD1. 1Belhadj Bouchaib University Center, Sidi Bel Abess road N101, Ain Temouchent, Algeria

Abstract: Three-dimensional static non linear finite analyses are conducted to estimate the performances of pan- els containing semi-circular notch reinforced with drill repairs. A volumetric approach is developed to obtain the notch stress intensity factor in mode-I condition and the plastic zone on the notch-tip. The effect of the stop-drilled hole position, the angle and the radius are taken in consideration. The re- sults show that the efficiency of the drilling repair is about 20% effective of the notch length with 51% of the notch-tip position.

Keywords: notch, drilling, plastic zone, Kρ

Numerical modelling in friction lap joining of aluminium alloy and carbon-fiber-reinforced- plastic sheets N. Mahmoudi1 and M Medbeur2 1Faculté de Technonologie Université Dr. Moulay Taher, Saida, 20.000 Algérie Email : [email protected] 2 Faculté de Technonlogie Université Mustapha Stanbouli Mascara Abstract: Multi-material combinations of aluminium alloy and carbon-fiber-reinforced-plastics (CFRP) have gained attention in automotive and aerospace industries to enhance fuel efficiency and strength-to-weight ratio of components. Various limitations of laser beam welding, adhesive bonding and mechanical fasteners make these processes inefficient to join metal and CFRP sheets. Friction lap joining is an alternative choice for the same. Comprehensive studies in friction lap joining of aluminium to CFRP sheets are essential and scare in the literature. The present work reports a combined theoretical and experimental study in joining of AA5052 and CFRP sheets using friction lap joining process. A three-dimensional finite element based heat transfer model is developed to compute the temperature fields and thermal cycles. The computed results are validated extensively with the corresponding experimentally measured results. Keywords: Friction stir welding, Aluminum alloy, CFRP, Numerical modelling

Deformation analysis of the tensile test sample using digital image correlation (DIC) A. Maati1, S. Belaid1, P. Balland2, L. Tabourot

1Mechanical Laboratory, Amar Telidji University, Laghouat 03000, Algeria 2 Univ. Savoie Mont Blanc, SYMME, FR-74000 Annecy, France Abstract: The objective of this work is to use the image analysis technique to measure strain during tensile test. A MATLAB program has been developed to obtain the true stress-strain curve for materials from DIC using the 7D software. This method also allowed us to identify other very useful parameters for the numerical simulation of sheet metal forming processes such as the isotropic hardening curve and Lankford coefficient. The test is filmed with a CCD camera whose images are acquired by Vision Stage software. This software proposes to configure the parameters of the acquisition such as the fre- quency and the number of images. Since the failure location is produced in the middle of the tensile test sample, a good agreement was observed between DIC and extensometer results.

Keywords: DIC, 7D Software, tensile test, true deformation.

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

Tribological study of Al-Si and Ti-W-N multilayer thin films deposited on stainless steel K. Chemaa1,*, S. Hassani2, M. Gaceb3 1University of Medea, LMP2M, University center, Medea, Algeria 2Centre for development of advanced technologies CDTA, MIL Division, Baba Hassen, Algiers, Algeria 3University of Boumerdes, faculty of hydrocarbons and chemistry, Independence Avenue, Boumerdes, Algeria

Abstract: Aluminum-Silicon thin film (85 at. % of Al and 15 at. % of Si) was deposited on 304 stainless steel substrate by PVD evaporation process and compared with piston skirt samples of Al-Si eutectic alloy (silicon composition varied from 11.7% to 14.5%). Another thin film of Ti-W-N (70 at. % of Ti and 30 at. % of W) was deposited on the first by PVD sputtering process. The first film showed a maxi- mum hardness value of about 8.3 GPa. The thickness of the film was about 1.2 μm. The second film showed a maximum hardness value of about 17.2 GPa with a columnar structure having elements with diameter between 50 and 400 nm. The thickness of the film was about 1 μm. XRD results showed that the two films had amorphous form, however Al and Si picks had been observed. Tungsten oxide WO3 (1 1 0) pick was also observed at the Ti-W-N film. Raman spectroscopy showed that Ti-W-N film is mainly composed of oxides (Tungsten oxide WO3, Titanium dioxide TiO2 and Aluminum oxide Al2O3) and Titanium nitride TiN. Tribological tests on the Ti-W-N film showed significant results compared to piston skirt samples made of Al-Si alloy. The friction coefficient values were approxi- mately 6 times lower (from μ≈0.52 for reference piston skirt samples to μ≈0.08 for coated sample). Wear rate of Ti-W-N film has a value of about 361 mm3.N-1.m-1. The reason of this height value of wear rate is the low hardness of the film compared with other hard films.

Keywords: Ti-W-N, Al-Si, thin films, PVD, tribology, coefficient of friction, pistons.

Optimization and reliability approaches of a cam mechanism H. Ferhat1, A. Hammoudi1,*, F. Djeddou1 1Institute of Optics and Precision Mechanics, Setif -1- University, 19000 Setif, Algeria

Abstract: The purpose of this study is to provide a synthesis of a cam-follower mechanism based on determinis- tic optimization approach and a reliability study. The first part performs a preliminary deterministic optimization in order to find an optimal size of the mechanism and to ensure good performances. The second part of this work is devoted to a reliability analysis where the system failure probability is evaluated by using approximated methods: FORM/SORM and Monte Carlo simulation method, using the Phimeca reliability engineer Software. Moreover, the inverse FORM method is carried out, bas- ing on the sensitivity measurements, to improve the design quality of the mechanism. The obtained results illustrated the effectiveness of the proposed synthesis by making the system more robust.

Keywords: cam mechanism, deterministic optimisation, reliability study, inverse FORM method.

Effect of the elastic-plastic behavior models on the GTN damage parameters identifications M.Hadj Miloud1,2, I. Zidane1,2, M. Mendas1,2, 1 University of Chlef, , Esalem City, 02000, Chlef, Algeria. 2, Laboratoire de Rhéologie et Mécanique LRM,, Esalem City, 02000, Chlef, Algeria.

Abstract: Gurson–Tvergaard–Needleman (GTN) model is widely used to describe the three stages of ductile tearing: nucleation, growth and the coalescence of micro-voids. In this work, we propose a new ap- proach of identification which consists of a simultaneous identify of the hardening law and GTN model using an inverse analysis. This method is proposed for the determination of FN and FC parame- ters. The results show a good agreement between the experimental curve and those obtained for GTN model coupled with hardening laws. In addition, the GTN parameters identified is validated by anoth- er reference. Keywords: Elastic-plastic law, GTN model, Identification,. Inverse analysis

Experimental and numerical study of bending behavior for honeycomb sandwich panel

A.Oubouzid*, B.Keskes, Y.Fizi 1Laboratory of Applied Precision Mechanics (LMPA). Institute of Optics and Precision Mechanics (IOMP). Ferhat Abbas University Setif-1- Algeria.

Abstract:Honeycomb sandwich structures are increasing being used to replace traditional materials in highly load applications. This study experimentally investigated the static behaviors of honeycomb- sandwich with Al skins and Al Honeycomb under three-point bending loads. The ASTM C393 standards were used as references to prepare test specimens and conduct experiments. In the pre- sent work experimental bending test have been reproduced numerically with a FE model. The fi- nite element simulation has been carried out with using of ABAQUS software and results were compared with experimental results. This comparison has not only been based on a load– displacement curve, but has been further exemplified by photographical images of local indenta- tion failure. The influence of friction between the puncher and the upper skin has been also evalu- ated numerically. Keywords:Finite element, Sandwich panel, Honeycomb, Three-point bending

Wear Behvior of steel coating obtained by thermal flame spraying Toufik. MANA 1, 1 Laboratory of Materials Technology and Process Engineering, Faculty of Technology, University of Bejaia, 06000 Bejaia, Algeria.

Abstract: The importance of the two-parameter approach in linear elastic fracture mechanics analysis is the great diversity of projectable materials, allows thermal spray to extend on a broad scope of application and in nomreuses industries. We can quote for example: recharging after wear, improvement of the mechanical properties, solutions for insulation and thermal conductibility, thus protection against cor- rosion. With each application, need the choice of adequate projectable materials. Materials for the me- chanical ingenery intended for the parts of contact must presented most suitable properties on the sur- faces for a better resistance to their degradation. Contrary to the corrosion which is deterioration relat- ed to an attack of the medium environment, wear is a deterioration resulting from a prolonged use of the part of machine. Indeed any action of mechanical movement or other deteriorates and weakened gradually the object. This state remains the paramount concern of the manufacturers. The had aim is to carry out coatings against wear by the thermal spray technique. The choice of the deposit is para- mount to give again a new technical life at piece-rates which one wants to protect. The hypereutectoid steel (100Cr6) coating worked out by thermal projection flame wire for different parameters of pro- jections present a wear behavior completely different, it is better for those which were worked out for a neutral flame comarativement to both other flame (reducing and) but at high speed the coating ob- tained by the oxidizing flame give a great wear resistance. The thermal flame sprayed steel hypereu- tectoid coatings has a more or less homogeneous lamellate morphology with the presence of some po- rosities and oxide particles. These coatings can offer the opportunity of renovating worn parts of crankshafts.

Keywords: Thermal flame spray, steel thermal spray coating, wear behavior, Weight Loss

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

Numerical Study of Artificial Periodontal Ligament Effect on Stresses Reduction in Bone-Dental Implant Interface

A. Merdji1,2,, A. Benaissa1, R. Hillstrom2, L. Aminallah1, N. Della1, S. O.M. Mukdadi3 1Faculty of Science and Technology, Mascara University, Algeria 2Medical Engineering Research Group, Faculty of Science & Technology, Anglia Ruskin University Bishop Hall Lane, Chelmsford, Essex, UK 3Department of Mechanical and Aerospace Engineering, West Virginia University, Morgantown, WV 26506, USA

Abstract: Finite element method (FEM) is an important tool used in our days even in medicine was the relation- ship between the human body and artificial structure can be predicted. This work presents a numerical study performed with FEM of new dental implant system. A conventional dental implant system was redesigned and an artificial periodontal ligament was interposed between the implant and the alveolar bone. The aim was to attenuate the stress in the bone surrounding the implant. The new system was assessed and the interface stresses compared with the ones provoked by the conventional implant. In general, the new dental implant provoked lower interface stresses due to the stress shielding effect of the artificial periodontal ligament.

Keywords: dental implant, periodontal ligament, stress, finite element method.

ANN Approach to Predict the Flow Stress of CMn (Nb-Ti-V) Micro Alloyed Steel Based on Compression Tests

H. Allaoui1, A. Guedri2,, L. Darsouni3, A. Darsouni3 1Doctorant au département de métallurgie et génie des matériaux, Université Badji Mokhtar, Annaba, Algérie 2 Laboratoire Infra-Res, Université de Souk Ahras, Souk Ahras, Algeria 3 Laboratoire de fonderie, Université Badji Mokhtar, Annaba, Algérie

Abstract:The flow behavior of CMn (Nb-Ti-V) micro alloyed steel was studied by hot compression tests in a wide range of temperatures (700 to 1050°C, Step 50 °C), strain rates (0.000794, 0.0029, and 0.01436 s-1) and true strain of 0 to 0.8. Based on the experimental true stress-plastic strain data, the artificial neural network (ANN) methods were employed to predict the flow stress of CMn (Nb-Ti-V). The ANN model was trained with Levenberg-Marquardt (LM) algorithm. The optimal LM neural network model with two hidden layer network with ten neurons in the first and ten neurons in the second gives the best predictions is developed. It is demonstrated that the LV neural network model has better per- formance in predicting the flow stress. The results can be further used in mathematical simulation of hot metal forming processes.

Keywords: Flow Stress, Micro Alloyed Steel, Artificial Neural Network, Hot Compression Tests.

Dynamic analysis of nonlinear pipeline resting on Winkler-Pasternack foundation via Monte Carlo method

M.Seguini1, D.Nedjar1 1University of Sciences and Technology of Oran Mohamed Boudiaf, Bp 1505 Elmenouar Oran, Alge- ria, Laboratory of Mechanic of Structures and Stability of Constructions LM2SC, Faculty of Architec- ture and Civil Engineering.

 Corresponding author E-mail address: [email protected]  Corresponding author E-mail address: [email protected] Abstract: In this study, a nonlinear dynamic probabilistic and deterministic analysis of pipeline resting on non- linear Winkler-Pasternack foundations has been done. A finite element model of soil-pipe interaction model has been developed, where the pipeline is modeled as a longue beam subjected to a distributed and seismic loads. Infact in order to analyze the large deflections of the pipeline, the Von Kàrmàn method combined to the theory of the local average of VanMarck has been used where the effect of shear deformation has been taken into account. The equation of movement has been resolved by using the Newmark theory combined to the Newthon Raphson method where the Monte Carlo simulations has been generated. The effect of the different random parameters of soil and the effect of the shear deformation on the behavior of the pipeline has been studied and which allows us to determine the re- al response of the pipeline.

Keywords: soil-pipe interaction, nonlinear dynamic analysis, finite element method, spatial variability, Monte Carlo simulations, Timoshenko and Euler Bernoulli theory.

The Interaction of Waves with a Double Perforated Walls Breakwater

Y. Boualia 1,N.Chioukh1,2,B.Hamoudi1,Z.Laffane1

1 Département de Genie Maritime, Université des Sciences et de laTechnology MB,Oran 31000

2 Département de Genie civile , Université de Djilali Liabes, Sidi Bél-Abbés 22000 [email protected]

Abstract: In the present investigation we examine the performance of an oscillating system consisting of two vertical surface piercing porous plates forced to move horizontally under the action of regular waves. Each plate is treated as a single-degree-of-freedom spring-mass-damper oscil- lator .With this disposition a single wave chamber unit is created, moving horizontally and does not allowing for wave overtopping. In the current study a semi-analytical solution is de- veloped by means of the eigen-function expansion method coupled to the dynamics of the two degrees of freedom system and the method of the least squares. The porosity of the walls is taken into account by using an effective expression that stems from Darcy’s law. The re- sults of the present method are presented and discussed in terms of several parameters of in- terest including the wave reflection and transmission coefficients, hydrodynamic forces on the plates, motion amplitudes of the plates, and power generated by the movements of the plates.

Keywords: Eigen-function expansion method, oscillations, power generation, regular waves, vertical po- rous plates.

Variation of Residual Stresses of Thermal Origin in Ceram-Metallic Copper -Alumina

(Cu / Al2O3) BENKRAMA Nasreddine , MILOUDI Abdelkader 1.Lab, University Mustapha STAMBOULI Mascara BP 305, Mamounia-Mascara road, Algeria [email protected] 2. lab, University Djillali LIABES Sidi-Bel-Abbes BP 89 22000 Sidi-Bel-Abbes - Algeria [email protected]

Abstract: Residual stresses are internal stresses that exist for an isolated system not subject to external forces and in mechanical and thermal equilibrium; they are present in all materials, components and in any structure of technological importance. The evaluation techniques of these stresses invariably measure deformations rather than stresses and the residual stresses are then deduced from the appropriate pa- rameters of the materials such as the coefficient of thermal expansion, the Young's modulus and the Poisson's ratio. Often, a single value of the stress is measured and it is implicitly assumed that the stresses are constant in the volume, on the outer surface and at depth. The measurement of residual The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

stresses is an important issue in compound systems and especially when the thermal expansion coeffi- cients of the constitutive phases are very different, because this can lead to the development of large residual stresses which can have a significant effect on the mechanical properties and the perfor- mance. Our work focuses on the determination of residual stresses of thermal origin in metal-ceramic type Copper -Alumina (Cu / Al2O3)

Keywords: Residual stress, Bimaterial ceramic-metal, Coefficient of thermal expansion, Finite elements

Electrochemical preparation of a conducting polymer thin layer on a quartz crystal microbal- ance surface in an ionic liquid

Boualem Mettai1,2,,Ahmed Mekki2, SoumiaKouadri Moustefai1, Wissam Kermouche2, Hanen Lagha2, Fateh Merdj2, Abderrezak Abdi2, 1Laboratoire eau-environnement, Université Hassiba Ben Bouali, Chlef, Algérie 2Ecole Militaire Polytechnique BP 17, Bordj-El-Bahri, 16111 Alger, Algérie

Abstract:The complex nature of chemical toxics justifies studies linked to high-performance technol-ogy and optimized procedures, applicable in a strategic and topical field, in this case chemi-cal detection. The purpose of our contribution is the use of sensitive materials based on pol-ymers in order to carry out and test a device for the detection of toxic gases. In this context, our work is focused on the electro- polymerization and the structural and morphological characterization of thin layers of poylyrrole /carbon nanotube nanocomposite synthesized in ionic liquids type deep eutectic solvent deposited on QCMs. Following the results obtained by the various tests to determine the performance parameters of our sensor and the effect of temperature, this latter showed better performance than those found in previous studies.

Keywords:detection, chemical sensors, toxic gas, conducting polymers, CNT, QCM, DES.

EFFECT OF WELDING PARAMETERS ON CORROSION BY USING GAS TUNGSTEN ARC WELDING (GTAW) FOR AUSTENITIC STAINLESS STEEL (304L) WELDMENT

Belkacem Amine KESSAL1, Chahinez FARES1, 1Laboratory for Theoretical Physics and Material Physics; Hassiba Ben Bouali University of Chlef, B.P. 151, 02000 Chlef, Algeria.

*Author mail: [email protected]

AbstractThe corrosion behavior and mechanism of AISI 304L welded joint by filer metal AISI 308L were in- vestigated using the imput parameter of welding process while the electrochemical impedance meas- urements were used as the output parameters. This paper presents an experimental design approach to study the welding process parameters effects on the corrosion statement at the Heat Affected Zone (HAZ). Three welding parameters are selected as input variables: Number of pass, gas flow (argon flow) and welding current.The various microstructures of the welded joint were characterized and their electrochemical properties were measured by conventional and localized electrochemical imped- ance spectroscopyEIS.The intercritical heat affected zone in the welded joint was the most vulnerable location to corrosion because this zone has less strength, more negative potential, and higher corrosion current density. The main and interaction effects of the welding parameters are studied. The result showed that the passes number and welding current are the most significant parameters which control the welding process.

Keywords Gas Tungsten Arc Welding (GTAW); EIS; corrosion; welding parameters.

Impact of green inhibitor compared with synthetic inhibitors for pipe corrosion in 1 M HCl me- dia

M. Soudani1, A. Mostefaoui1, B.G.N.Muthanna2, K. El-Miloudi1, M.H. Melian1,2,

1University of Chlef,LPTPM, Esalem City, 02000, Chlef, Algeria. 2University of Chlef, LRM, Esalem City, 02000, Chlef, Algeria. 3LE3M, University of Lorraine, Îlea of Saulcy, 57045 Metz, France

Abstract:The impact of the environment can cause many types of degradations such as pitting corrosion, stress corrosion cracking and sulphide stress cracking of metal structures, and one of serious prob- lems in the oil extracting industry is the corrosion process. Recently, a number of assets fail- ures caused by internal corrosion is recorded in the oil and gas industry. Reports have con- firmed that failures are due from the effect of HCl traces. Our objectives are to use the plant extracts, such as organic corrosion inhibitors. Indeed, these natural extracts contain many families of natural organic compounds – ‘green’, readily available and renewable. The mechanics tests carried out on a study of anti-corrosive properties of natural products - plant origin have so far given promising results of fracture mechanics properties. The importance in this area of research is mainly related to the fact that natural products can replace present toxic organic molecules, condemned by world directives as environmentally unacceptable.

Keywords:Three points pending, green inhibitor concentration, API 5L Steel.

Effects of the parameters of corrosive environment on the reliability of an AISI 304 structure

R.Boutelidja1, A. Guedri1,, M.A. Belyamna1, B. Merzoug2

1 Laboratoire Infra-Res, Université de Souk Ahras, Souk Ahras, Algeria 2 Département de genie mécanique, Université Badji Mokhtar, Annaba, Algérie

Abstract: In this paper the work is based on the application of probabilistic rupture mechanics (MRP) models to predict the reliability of pressure pipelines in nuclear power reactors. The simulation of cracking of stainless steel piping under the conditions of intergranular stress corrosion cracking (CSC-IG) is based on the general methodology recommended by the pipe reliability analysis program including seismic events (PRAISE). The CSC-IG is characterized by a unique damage parameter that depends on resid- ual stresses, environmental conditions, and degree of awareness. This parameter can be used to assess structural reliability and identify most effective approaches to improve pipe reliability. The effect of the corrosive environment on reliability is analyzed in the present work . Keywords: Probabilistic Fracture Mechanics; Stress Corrosion Cracking Environment; Structural Reliability.

Interpretation of the effect of the hydrostatic test in gas and oil pipeline A. Guedri1,, M.A. Belyamna1 1Laboratoire Infra-Res, Université de Souk Ahras, Souk Ahras, Algeria

Abstract: After construction and installation, the natural gas and oil transport structures must undergo hydrostat- ic tests before their location and periodically during commissioning. These hydrostatic tests can be classified into two categories: resistance test and leak proof test. The application of an overload is a spectacular phenomenon can be exploited for example during test tests of components working under pressure. This destructive control method involves overloading the structure. If a critical fault with re- spect to the proof test exists in the pipeline, the pipeline is destroyed. Otherwise, it is not broken and defects under critical will see their subsequent propagation by fatigue slowed down or even eliminated thanks to the effect of overload.

Keywords: hydrostatic test; simulation; gas and oil pipeline; Abacus standard; Overload.

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

Experimental analysis of internal pipe elbow steel erosion-corrosion Bassam Gamal Nasser Muthanna1,*, Madjid Meriem-Benziane1,Mohammed Hadj Meliani2,3, Boualem Mettai4 1University of Chlef, LRM, Esalem City, 02000, Chlef, Algeria 2University of Chlef,LPTPM, Esalem City, 02000, Chlef, Algeria. 3University of Lorraine,LE3M,Îlea of Saulcy, 57045 Metz,France 4Ecole Militaire Polytechnique BP 17, Bordj-El-Bahri, 16111 Alger, Algérie * [email protected], [email protected]

Abstract:Due to the decrease the quantity of the potable water in the last decade on the worldwide, the desalina- tion station is one among of the most important ways of Seawater desalination to supply the dry re- gions, regions and the regions close of the sea with water treated. During the steps of desalina- tion appeared many problems such as the corrosion problems due to the materials of piping systems and theirs geometrical shapes, and the chemical composition of water taking into account the condi- tions of transporting. Pipe elbow is one of the necessary parts to build of integrated piping system where it is considered link point between different parts of transport systems. Due to its effective role and its complex forms that it based on welding processes. All these reasons make it vulnerable the corrosion problems taking into on considerations the liquid nature, the pressure and the temperature. Depending on the mechanical characterizations tests such as metallurgical examinations using optical microscopy, the scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray fluores- cence (XRF) allowed to analyze the main causes of this defect. The obtained results showed that there are technical solutions to prevent and reduce the internal corrosion in the pipe elbow which helps in- creasing the energy development.

Keywords: Corrosion, Erosion, Desalination, pipe elbow, SEM, XRF, XRD

Instability effect of AuSi liquid metal alloy source-focused ion beam LMAIS-FIB on SiO2/Si na- nopatterns

F.Benyettou1*, A.Aissat1 1University of Blida, LASICOM, Route de Soumaa, 09000, Blida, Algeria.

Abstract: In this latter, we present an experimental work that addresses the effect of instability of AuSi liquid metal alloy source-focused ion beam (LMAIS-FIB) on the morphology and milling parameters of sets of nanopatterns with different widths fabricated by 30 KeV Au+ ions LMAIS-FIB. We have investi- gated this impact by calculation of sputtering yield using the extracted sputtered volume from AFM line profiles. The obtained results are compared with theoretical results using Yamamura model for validation.

Keywords: Nanopatterns, Sputtering yield, LMAIS-FIB, Milling.

Multiscale failure analysis of composite materials by the boundary element method

A. Sahli*, S. Yamani, M. Rida Seba,O. Benouis

1Laboratoire de recherche des technologies industrielles, Université Ibn Khaldoun de Tiaret, Algeria BP 78, Route de Zaroura, 14000 Tiaret, Algérie, E_Mail : [email protected]

Abstract:The so-called multiscale methods generally employ a process of homogenization of mechanical prop- erties, to develop methods to predict the responses of solids that have developmental failures in the microstructure, which is represented by small volumetric elements called representative volume ele- ments (RVE), which are of sufficient length to capture all the average details of the microstructure. This article aims to develop a numerical in unidirectional laminates, based on multi-scale modeling of heterogeneous materials, and using failure criteria, Tsai-Hill and maximum deformation, to detect any failure of the matrix and fiber, respectively. One way out is what is commonly known as multi-scale modeling, where macroscopic and microscopic models are coupled to take advantage of the efficien- cy of macroscopic models and the accuracy of microscopic models. The goal of this multi-scale mod- eling is to design combined macroscopic-microscopic computation methods that are more efficient than solving the complete microscopic model and at the same time to provide the information we need at the desired precision. In the macroscale (global scale), the Boundary Element Method (BEM) for anisotropic plane elasticity was used to evaluate strain and stress fields in the domain of the lami- na. These fields represent the macroscopic tensor of the structure, which is used to evaluate the boundary conditions in the microscale (local scale). Computer implementation of BEM and multi- scale approaches, to perform defect analyzes on composite laminates; Discussion of the results ob- tained from the multi-scale analysis and the failure are compared with the results obtained by other analyzes.

Keywords:Composite Materials, Multiscale Modelling, Boundary Element Method, Representative Volume El- ement, Mean Fields Theory, Failure Criteria.

Obtaining elastic-plastic and cohesive fracture parameters using a combined experimental, nu- merical simulation and optimization method Y. Fizi, L. Kerdja, Laboratoire de Mécanique de Précision Appliquée, Institut d'Optique et de Mécanique de Précision IOMP Université Ferhat Abbas UFAS1, Sétif, Algeriay

Abstract:The aim of this paper is to present an experimental–numerical methodology for identification of me- chanical behavior under static loading. Several mechanical tests were performed to examine the me- chanical behavior of nonlinear structural. Identification of elastic–plastic and cohesive fracture param- eters using optimization approach is considered in the present study. In the first step, an experimental– numerical methodology for the identification of elastoplastic material by means of inverse analysis and indentation tests is presented. Identification of elastic-plastic parameter using optimization is based on a calculation of a difference between experimentally measured and numerically obtained da- ta. The standard tensile test are also carried out for comparison and validation. The stress-strain results extracted from the inverse analysis are utilized to simulate the compact tension. Thus, a mechanistic approach was proposed for extracting the cohesive fracture parameters material. The approach was based on the combination of compact tension test, finite element and inverse analysis techniques. The inversion process is based on the use of artificial neural networks ANN.

Keywords:Compact tension, inverse analysis, element finis, cohesive fracture, ANN Optimization

Numerical-Experimental Characterization of honeycomb sandwich panel for determining the modal parameters of the damaged structure A. Bendada, A. Chouiter, D. Boutchicha, M.Miri LMA, Université des Sciences et de la Technologie d’Oran Mohamed Boudiaf, USTO-MB, BP 1055 El Menaour, Oran 31000, Algerie.

Abstract: In this paper, we present new application to investigate the modal parameters of damaged honeycomb sandwich panel. Firstly, we have identified the constants properties (, , , , , , , , ) of the core using numerical technique and experimental vali- dation, the numerical method consist of determining the elastics properties from series of simulations (extension and shear) on Volume Element Representative, the elastic properties are obtained and will be used for a 3-D Finite element model for evaluating the modal parameters (natural frequencies and modes shape) of a honeycomb composite sandwich panel. In order to validate the numerical achieve- The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

ments, Experimental Modal Analysis of a free-free edge rectangular aluminum honeycomb sandwich plate is proposed and tested. Comparative investigations between the numerical and experimental frequencies and also correspond- ing mode shapes show a good agreement and illustrate that the characterization of pure core gives the accurate elastic properties and allow us to creating a best finite element model for a new mechanical analysis which is for show the influence of delamination in honeycomb sandwich structure.

Keywords: Characterization; Honeycomb sandwich, Homogenization, Modal analysis, delamination

Contribution to the modelling and homogenization of 3D structures in the presence of cracks by XFEM Benkhechiba Abdelfattah elhadj 1,,Guesmia Mohammed1,Hachi Brahim Elkhalil1, ,Hachi Dah- mane1,Moussaoui Moustapha1 1 Laboratoire de Développement en Mécanique et Matériaux, University of Djelfa, PB 3117, Djelfa, Algeria.

Abstract: This work is consisted to model the behavior of three-dimensional structures, containing heterogenei- ties (inclusions, voids and cracks), using the extended finite element method (XFEM), in order to quantify the displacement fields and the effective parameters in a linear-homogenization context. To reach this aim, we have combined different spatial-set functions that we have developed at first. Many validations were made with the result obtained using available commercial software to ensure the developed code efficiency and accuracy. Keywords: Inclusion, voids, cracks, XFEM, 3D Homogenization, Level-Set functions.

Impact of the leachates of the old uncontrolled dump on the immediate environment: Case of the old rubbish dump of Tiaret commune (Ain Guesma road)

B. Khatemi 1,, Y Laidani 2,a, G. Henini 2,b, A. Fikaouni 2,a, K. Djellouli della 3,b 1,University of Ibn Khaldoun, Tiaret, 14000, Tiaret, Algeria. 2, a University of Chlef, LVCWE, P.O. Box.151, Esalem City, 02000, Chlef, Algeria. 2, b University of Chlef, LEW, P.O. Box.151, Esalem City, 02000, Chlef, Algeria. 3University center of Tindouf, 37000, Tindouf, Algeria.

Abstract: The importance of the The random disposal of municipal waste has long been the most economical and most used means of waste by the emanation of foul odors mainly due to the permanent production of biogas and leachates. Leachate, with a high pollutant load, seeps into the subsoil, causing de facto severe degradation of the environment located near the landfill. This work, which is the subject of our research, is part of the study of the direct impact of leachates on groundwater tables and on the population located near the wild dump of the commune of Tiaret. The various analyzes carried out on leachate from the landfill were carried out in specialized laboratories in Algeria. These leachates are in the form of a percolate, with a high mineral, organic and metallic pollutant load (chlorides, sulphates, chromium, cadmium, iron and copper and others). Ecotoxicological ap- proach.

Keywords: landfill, pollution, leachates, environment.

Numerical simulation of a low turbulent flow around square cylinder with a modified V2F turbulence model A. Mokhtar Didouche1, A. Benarous 2 1 University of Chlef, LCEMSM, Esalem City, 02000, Chlef, Algeria. 2University of Blida, SOUMÂA road PB 270 BLIDA, 09000, Blida, Algeria.

Abstract: In the present work, a numerical investigation of an unsteady two-dimensional flow around a square cylinder at low turbulence are presented. The modified V2F turbulence model has been tested and im- plemented in FLUENT using User Defined functions (UDFs) to predict a structure flow as well as the reattachment length and Strouhal number against experimental results. The results agree closely well with the data from experimental for the present model, in the terms of the length of the recirculation region and the vortex shedding frequency, whereas, the in-built FLUENT V2F model gave a consider- able errors for these quantities. In addition, the UDF is used to demonstrate that the model predictions are very sensitive to the interpretation of the model formulation. Consequently, it is concluded that whereas the V2F model is not sensitive to numerical method or method of coding, it is sensitive to changes in the interpretation of the formulation of the model.

Keywords: V2F model, Bluff-body, Low-Reynolds number, UDFs.

The Choice of the Appropriate Solar Radiation Model for the Site of Laghouat

D. Bensahal2,, A. Yousfi2, F. Chabane1, M. Rahmani2, 1Laboratory of mechanics, University of Mohamed Khieder, Biskra, Algeria. 2LGM Laboratory, University of Amar Telidji, Laghouat, Algeria

Abstract:Our study aims to find the appropriate model of solar radiation at the Laghouat site. To do that, we have chosen four models of literature for the prediction of solar radiation such as the model of: Capderou, Kasten, Liu jordan and Brichambaut. The experimental study which consists in determin- ing the solar radiation of the two days: November 20, 2017, February 25, 2018 and the establishment of a comparison later between the results obtained experimentally and the results obtained by the models. By calculating the coefficients of determination (R2), we observed that the model of Kasten and Liu Jordan are the suitable for the Laghouat site with R2 value between the range [0.92, 0.99] for the day 20-11-2017 with angle of inclination equal 10o but for the day 28-02-2018, the Kasten model is more accurate than the others with R2 value between the range 0.82 and 0.75% for 10 ° and 20 °.

Keywords:solar radiation, coefficient of determination, angle of inclination, model.

Interaction of Surface Radiation with Free Convection in a Vertical Cylindrical Annular Cavity

Mohamed Amine MEDEBBER #1,2, Belkacem OULD SAID 1, Noureddine RETIEL 1, abderrahmane Aissa 2 1 Laboratory Numerical and Experimental Modeling of Mechanical phenomena, Mechanical Engineering De- partment, Abdelhamid Ibn Badis University, Mostaganem, Algeria 2 Mechanical Engineering Department, Mascara University, Algeria

Abstract: The interaction of natural convection with thermal radiation of gray surfaces in a cylindrical enclosure filled with air has been numerically investigated. The effect of radiation on the flow field, temperature distribution, and heat transfer is predicted. The result shows that surface radiation significantly altered the temperature distribution and the flow patterns, especially at higher Rayleigh numbers. The average convection Nusselt number increases with the increase of Ra. The presence of surface radiation can change the value of average convection Nusselt number, but only little variation can be observed with the increase of emissivity. The average radiation Nusselt number rises quickly with the increase of

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

emissivity, and radiation heat transfer plays an important part in overall heat flux at larger emissivity. The average Nusselt number has also been discussed for valuating heat transfer through the enclosure.

1Keywords: Computational fluid mechanics; Natural convection; Surface radiation; Finite Volume Method; Par- tially Annular cavity; Total Nusselt Number, Radiave Nusselt Number, Convective Nusselt Number.

Thermal Analysis of enhanced Receiver Tube of Parabolic Trough Collector Using Ring Inserts

M.R. Haddouche1, A. Benazza2, 1University of DjillaliLiabes, SidiBel-Abbes, 22000, SidiBal-Abbes, Algeria. 2University of DjillaliLiabes, SidiBel-Abbes, 22000, SidiBal-Abbes, Algeria.

Abstract:Absorber tube is the major component of a Parabolic Trough Collector (PTC).The aim of this study is to investigate numerically the impact of the introduction of inserts (Ring inserts) inside the tube wher- ethe Heat Transfer Fluid (HTF)circulates and we were analysed the thermo-hydraulic performance of this tube. Therminol®VP1 is used as an intermediate heat transfer fluid with working temperature of 573K.The geometry of the inserts was varied for Reynolds number range from 4.73x104 to 2.36x105.The numerical results are presented in form of Nusselt number and friction factor as a func- tion of Reynolds number.

Keywords:Nusselt number, Parabolic through collector, Heat transfer fluid, Finite Volume Method, Heat trans- fer.

A comparative study of fluid flow past cylindrical and cubic staggered tube bundle

M. Bedrouni 1, A. Khelil 1 1University of Chlef, Laboratory of control, Testing, Measurement and Mechanical Simulation, B. P. 151, 2000 Chlef, Algeria

Abstract: This paper aims to study numerically the fluid flow past in two different configurations: staggered cylindrical tubes and cubic tubes. To validate the model, a numerical simulation of fluid flow past in staggered tube bundles for Re=12 858 is performed based on the experiments of Balabani, 1996 and the obtained results showed that The LES model produced a good agreement with the experimental data compared to other models. The streamwise and transverse velocities, vorticity have been calculated with each configuration then compared.

Keywords: LES, tube bundles.

Transient Numerical Analysis of Free Convection in Cylindrical Enclosure Mohamed Amine MEDEBBER #1,2, Sofien MAHMOUDI3, Belkacem OULD SAID 1, Noureddine RETIEL 1 1 Laboratory Numerical and Experimental Modeling of Mechanical phenomena, Mechanical Engineering De- partment, Abdelhamid Ibn Badis University, Mostaganem, Algeria 2 Mechanical Engineering Department, Mascara University, Algeria 3Science Technique Faculty, Saida University, Algeria

Abstract: A transient two dimensional study of free convection in a vertical cylinder partially annulus is con- ducted numerically. Uniform temperature is imposed cross a vertical wall, while the top and bottom walls are adiabatic. The governing equations are solved numerically by using a finite volume method. The coupling between the continuity and momentum equations is effected using the SIMPLER algo- rithm. Solutions have been obtained for Prandtl numbers equal to 7.0, Rayleigh numbers of 103 to 106 and height ratios 0.5. The influence of physical and geometrical parameters on the isotherms, velocity fields, average Nusselt has been numerically investigated.

Keywords: Computational fluid mechanics; Natural convection; Surface radiation; Finite Volume Method; Par- tially Annular cavity; Total Nusselt Number, Radiave Nusselt Number, Convective Nusselt Number.

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

Regulation of the Water Jet for a Pelton Turbine Injector

N. Hamdi1, S.Benmansour2,, J.L.Kueny 1Laghouat University, Route De Ghardaia Bp 37G 03000 Laghouat, Algeria 2USTHB, BP 32 El Alia 16111 Bab Ezzouar Alger, Algeria 3Laboratoire LEGI, Grenoble, 1209 Rue de la Piscine, 38610 Gières, France

Abstract: Bent pipe geometry such as that found in the manifold of a Pelton turbine can have a harmful influ- ence on the jets. The jets are neither uniform, coaxial, nor cylindrical, and the jet can strike on the wrong place in the buckets of the Pelton turbine wheel. Peaks of velocity and the total pressure may not be located exactly on the centerline of the injector. The aim of this work is to regulate the water jet for a Pelton turbine injector by changing the design of the nozzle injector. Helical grooves are added to the inner wall of the nozzle. Numerical simulation shows that the helical grooves yield a sharper and much more uniform jet, which is confirmed by the velocity and the total pressure profiles on the cross-section of the jet, and the peaks of these curves are located on the axis of symmetry of the injec- tor. The velocity vectors are affected similarly, which leads to the concentration of the jet striking force on the right place on the center of the bucket; consequently, this contribution could be exploited to increase the efficiency of these machines.

Keywords: Pelton turbine, jet, bucket, grooves, uniform

Estimation of Herschel-Bulkley Rheological Parameters of eco-friendly Drilling Fluid using Ge- netic Algorithm

H. Ouaer1,, M. Gareche2 1, 2University of M’HamedBougara of Boumerdes FHC, Independence Avenue 35000 Boumerdes, Algeria.

Abstract:In the petroleum industry, information on the rheological behavior of drilling fluids formulated based on polymers and bentonite is of paramount importance to ensure the success of drilling operations. The combination of rheological models with practical experience is required to have a near-optimum rheological characterization and a better insight into the overall fluid performance. In this paper, the Hershel-Bulkley rheological parameters of an environmentally friendly drilling fluid formulated based on an Algerian bentonite and two polymers –Hydroxyethyl cellulose and Polyethylene glycol– have been optimized using a genetic algorithm. The effect of temperature and sodium chloride (NaCl) on the three-parameter Herschel-Bulkley model was also studied. The genetic algorithm technique pro- vided improved rheological parameter characterization compared to the nonlinear regression, especial- ly in the case of drilling fluids formulated with sodium chloride making it a better choice. Further- more, the oscillatory test offered more reliable yield stress values. The rheological parameters were found to be very sensitive to different conditions. Yield stress and consistency index reaching a max- imum at a temperature of 65°C and decreased when adding sodium chloride to the drilling fluid. The flow index changed inversely to yield stress and consistency index. The physical origins of these changes in rheological parameters were discussed and correlation between variation in rheological pa- rameters and the bentonite suspensions properties were concluded. Based on these results, it is rec- ommended to use the proposed formulation of drilling fluid with the adequate concentration of poly- mers at high temperature due to the gelation mechanism, and to select the optimum concentration of NaCl to avoid degradation of the rheological parameters.

Keywords:eco-friendly drilling fluids, polymers, temperature, salt, genetic algorithm, Herschel-Bulkley.

Thermal study of a beam and grille exchanger E 102

M A.Amraoui.2,, 2University Djillali LIABES Sidi-Bel-Abbès Algeria

Abstract: The high cost and energy demand continue to be a major concern for humans in addition to the envi- ronmental problems that threaten life on the planet. In this brief, we studied the thermal energy per- formance of a heat exchanger grille and tube which is very used petroleum and air conditioners The objective of this study adds roughness to the grille to increase the area the heat exchanger be- tween the tubes. We do a numerical study using the calculation code '' fluent '' to study dynamic be- havior and temperature for flow of the fluid in the level the grille without roughness and with rough- ness.

Keywords: Heat exchanger, roughness, the grille, fluent.

Hydrogen Production by inductively Coupled Plasma in Methane Abdelatif Gadoum*1, Djilali Benyoucef1, and Rachid Taleb1 1Laboratoire Génie Électrique et Énergies Renouvelables, Chlef University, Algeria.

Abstract: Hydrogen occurs naturally in the form of chemical compounds, most often in water and hydrocarbons. The main objective of this study is 2D modeling of hydrogen production in inductively coupled plas- ma in methane at low pressure. In the present model, we include the motions and the collisions of both neutral and charged particles by considering 24 species (i.e in total; neutrals, radicals, ions, and elec- trons), and more than 40 reactions (electron impact with methane, neutral-neutral, neutral-ions and surface reactions). The results show that the rate conversion of methane to hydrogen is about 27%, and the total conversion rate of methane to different species is 85%.

Keywords: Boltzmann equation, Navier-Stokes equation, inductively coupled plasma, Hydrogen production, methane plasma.

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

Effects of shear deformation on buckling of laminated composite beams M. Sahla1, H.Youzra2,, H.Saidi3 1 University of Sidi Bel abess, LMH, Rue Kadi Ben Kadi SBA, Sidi Bel abess, Algeria 2 University of Mascara, Faculty of technology, PB305 Mamounia Mascara Road, Mascara, Algeria 3 University of Sidi Bel abess, LMH, Rue Kadi Ben Kadi SBA, Sidi Bel abess, Algeria

Abstract: The nonlinear response of composite beams modeled according to higher-order shear deformation theories in post-buckling is investigated. The beam ends are restrained from axial movement, and as a result the contribution of the mid-plane stretching is considered. The equations of motion and the boundary conditions are derived using Hamilton’s principle. The shear deformation effect on the criti- cal buckling load and static post-buckling response is introduced using classical, first-order, and high- er-order shear deformation theories. This paper presents an exact solution for the static post-buckling response of a symmetrically laminated simply supported shear-deformable composite beam. The shear effect is shown to have a significant contribution to both the buckling and post-buckling behaviors. Results of this analysis show that classical and first-order theories underestimate the amplitude of buckling while all higher order theories, considered in this study, yield very close results for the static post-buckling response.

Keywords: Composite beams, Shear deformation, Post-buckling.

Reliability model of laminated composite plate with finite element method A. maizia 1, H. Abdelkader1,H. Dehmous 2 1 Laboratoire Contrôles, Essais, Mesures et Simulations Mécaniques - Hassiba Benbouali University of Chlef. BP151, Chlef 02000, Algérie, Email : [email protected] , [email protected]. 2 Département de Génie Civil, Université Mouloud Mammeri, Campus Hasnaoua, Tizi-Ouzou CP 15 000, Algérie. Email: [email protected], [email protected].

Abstract:In this paper, a reliability model of laminated composite plate structure is implanted, biased in axial tension. This model has been executed using finite element analyses with Ansys APDL, for defining the field of displacement and stress. The results of the finite element model, is compared with an analytic model. In the second part, the reliability model is used to define the lami- nate parameters, which can influence the reliability of stacking sequence [±55]5, by sensitivity analy- sis. Finally, a study of probability of failure of orthotropic materials has been put in place. This me- chanic-reliability model was carried out based on the Tsai-Wu failure criterion. The results obtained, clearly shows that the use of the fiabilist approach is essential to make reliable and economical com- posite laminates sizing. It can also be seen that the most influential parameters are the thickness, the angle of orientation and the applied load.

Keywords:Reliability, laminate plate, Tsai-Wu, Finite element, Monte Carlo method.

Fatigue Crack Propagation in repaired composite Patch

H. Benzaama1,*,Hamadouche Fella, A. Benchiha2,,M. Bentoumi3 and A. Benzaama4

1Ecole Nationale Polytechnique d'Oran, Maurice Audin, LABAB, Oran, Algerie 2Ecole Nationale Polytechnique d'Oran, Maurice Audin, LaRTFM, Oran, Algerie 2 LAO, Institute of Optics and Precision Mechanics, Dpt. of civil Engineering, University of BordjBouArreridj, Algeria 4UNiversite de Science et Technologie USTOMB, Dpt. Génie Maritime, Oran Algérie

Abstract:Fatigue damage is always applied to aircraft during navigation. Adhesively bonded composite patch repair technique has been successfully applied to military aircraft repair and expanded its application to commercial aircraft industry recently. In this paper, effect of composite patch repair (Boron/Epoxy) on fatigue crack propagation was investigated on 2024-T3 aluminum. Effects of double patch repair in

notched aluminum panels on FCP were studied and compared to single patch repair. Results show beneficial effect of patch repair on fatigue life and fatigue crack propagation in comparison with the un-patched specimen. In addition, effect of mean stress characterized by stress ratio was highlighted. The fatigue life was then estimated with the NASGRO equation.

Key woerd: MEF, Fatigue life; crack propagation; composite patch; repaired aluminum plate.

Analysis of the presence of bonding defects on the fracture behavior of a damaged plate repaired by composite patch. N.Kaddouri1, K. Madani 1 ,M.A.Bellali 1,S. Djabbar 1. Laboratoire Mécanique Physique des Matériaux (LMPM), Université de Sidi Bel Abbes, Sidi Bel Abbes, Algérie1

Abstract: The repair technique has presented its effectiveness in the mitigation of the constraints at the level of the areas of concentration of constraints. The search for a patch and suitable adhesive for a good trans- fer of load has pushed researchers to develop ideas which relate, the form, the nature, the sequence of the stacking type of adhesive to give a better combination of the patch and the adhesive. Our work fits in this context, the objective is to analyze by the method of finite elements the behavior in the rupture of a damaged plate in the presence of a default of bonding. The analysis of the J-Integral in the plate and stresses in the adhesive and patch shows clearly that their values depends strongly on the position of the default by report to the free edge of the adhesive and the crack.

Keywords:J- Integral, bonding defect , peel stress, shear stress. Evaluation of impact damage in glass/epoxy composite tube laminate A. Ghouaoula, A.Hocine1,, A.Maizia.1,Z.Azari ,M.Hadj meliani

Abstract:This papers aims to presente the influence of damge in to the elastique bihavior of composite tube un- der cyclic tensile .Monotonic and cyclic tensile tests and free vibration characterization are carried out. Results show that the composites tube, when exposed to cycle loding the nenre of the number of cycles is shown to induce a significant change in the shape of the tensile stress-strain curve, a de- crease in the elastic modulus . In addition, the tests were also repeat with two different tensile loading 15 KN and 20KN. The results indicate that the damage of the pipes significantly increases with in- crease with the increase of number of cycle, they are also found to increase as the tensile loading in- crease.

Keywords:Tubular structure, Multilayer composite, Viscoelastic, Damage, Pressure loading, , storage vessel , composite reinforcement.

Evaluation of pipeline elbow steels deformation at critical zones Madjid Meriem-Benziane1, Bassam Gamal Nasser Muthanna1, Ibrahim GADI1, Khelifa Belhadj-Mokhtar1 1 LRM, Mechanical Engineering Department, University of Chlef Po Box151, Chlef 02000, Algeria E-mail: [email protected], [email protected]

Abstract: This project presents numerical study on the deformation of elbow at critical zone to different stresses during the hydrocarbons transport in the pipeline. The finite element method (3D) is used to investi- gate the deformation in two kinds of materials API X65 and API X100 under the internal pressure due to the fluid-solid interaction (FSI). This phenomenon is based on the Tresca and the Von-Mises stress- es which allow to predict the behavior of elbow for 90° and 180° in the critical zones. This study al- lowed to compare the performance and efficiency of each material for different positions of the elbow path such as extrados, intrados, and the elbow center taking into account the thickness and the radius. Depending on the fluid behavior, the results showed that the accurate prediction for internal pressure for two materials helpful to improve an elbow design and to increase the safety of hydrocarbons transport. The obtained results indicated that the API X100 is the fittest than the API X65 to energy transport. Keywords: Elbow, API X65, API X100, Tresca, Von-Mises, Finite Element Method, Fluid-solid interaction (FSI).

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

Structural Damage Zones Detection by Finite Elements

M.L. Moussaoui* Department of Mechanical construction and Production, Faculty of Mechanical Engineering and Chemical Engineering, Uni- versity of Sciences and Technology Houari Boumediene, B.P 32 El-Alia, Bab Ezzouar, Algiers 16111, Algeria

Abstract: In this study, a potential damaged structure has been analyzed using Ansys finite element Software which reads in batch mode programming a detailed mesh data file, computes the transient dynamic structural response and displays the results for each time step iteration for a selected analysis time range. The material properties matrix of an existing reinforced con- crete specimen is considered in this analysis. This research work Introduces the reinforced concrete strength for the specific case of an analyzed bridge structure. The developed formu- la is a function of the composite volumes fractions. Ideal Von-Mises failure criterion ellip- soid envelope has been applied to detect overstepped computed stresses values correspond- ing to damage cracks zones.

Keywords: Damage zones, Dynamic detection, Finite element method, Mixture of materials, Reinforcedconcrete properties

The femur fracture with a different cemented total hip prosthesis

M.S. Zagane1-2, A. Benouis, A. Sahli3, S. Benbarek4 1UUniversity of IbnKhaldouneTiaret, City Zaaroura BP 78 14000 Tiaret, Algeria 2 LMPM, Department of Mechanical Engineering, University of DjillaliLiabesSidiBel Abbes, City Ben M’hidi BP 89, 22000, Algeria

Abstract: Total hip prosthesis was used for the patients who has the hip fracture and unable to recover naturally. To design highly durable prostheses one has to take into account the natural processes occurring in the bone. In this paper, the static load analysis is based, by selecting the peak load during the stumbling activity. Two different implant materials have been selected to study appropriate material. The results showed the difference of maximum von Misses stress and detected the fracture of the femur shaft for different model (Charnley and Osteal) implant with the extended finite element method (X-FEM), and after the results of the numerical simulation of X-FEM for different was used in determining the stress intensity factors (SIF) to identify the crack behavior implant materials for different crack length. It has been shown that the maximum stress intensity factors were observed in the model of Charnley.

Keywords: Total hip prosthesis, extended finite element method, Fracture, Femur, Stress intensity factor.

Diagnosis of rotating machines by vibratory signal

A. Deliou1, 2,*, B. Bouchouicha 2, S. Boulkroune1, G. Slimani1, M. Chaour1, B. Hamadi1 1Research Center in Industrial Technologies CRTI, P.O.Box 64, Cheraga 16014, Algiers, Algeria. 2University of Sidi Belabbes,LMSR, Sidi Belabbes City, 22000, Algeria.

Abstract:The vibratory analysis makes it possible to detect practically all the defects likely to appear in the ro- tating machines, an unbalance, a game, a misalignment, a worn or damaged bearing ..., result in a var- iation of the internal forces that undergoes the machine, and thus to a modification of its vibratory be- havior. Many of the problems associated with the detection of machine organ defects can be solved by conventional Fourier analysis techniques.In this work we seek to accommodate a reasonably detailed study on the diagnosis and detection of several defects in rotating machines and above all the bearing defects of our URMA /CRTI vibration test bench. Keywords:Vibration analysis, different defects, bearings, geometric fault.

Study of resistance to fatigue of pipeline steel weldments X70

A. Deliou1, 2,*, B. Bouchouicha 2, S. Boulkroune1, G. Slimani1, M. Chaour1, B. Hamadi1 1Research Center in Industrial Technologies CRTI, P.O.Box 64, Cheraga 16014, Algiers, Algeria. 2University of Sidi Belabbes,LMSR, Sidi Belabbes City, 22000, Algeria.

Abstract:The objective of our work is to study the propagation of the fatigue crack in the different zones of the API 5L X70 steel welded joint used for the manufacturing of the pipelines, the welding process is with the arc under flow, in this study we characterize our material by destructive mechanical control tests. Tensile tests, analysis of the microstructure and hardness in the different areas of the welded joint. For a better understanding of the processes leads to the ductile tear of welded materials, we checked the evolution of the integral J and the displacement of the opening at the crack tip as a function of ad- vance of the crack by finite element method using an Abaqus calculation code in welded metal and in base metal.

Keywords:X70 welded joint, Integral J, CTOD, Ductile tear.

Evolution of SIFs in Elliptical Cracks emanating from interface in Orthopedic Cement-implant THP

A. Benouis1,2,, N. Djebbar2, A. Sahli2, B. Benali2, M. E.S. Zagane2, M. Cherfi2 1 University of Saida, Bp 138 saida, 20000, Algeria 2 LMPM, Djillali Liabes University of Sidi Bel-Abbes, Algeria

Abstract: In this study, the finite element method is used to analyse the crack behaviour in the orthopedic ce- ment of the total hip replacement by computing the stress intensity factors (SIFs) around the crack-tip. In this work, two loads are studied: static and dynamics loads, for an elliptical crack emanating from an interface cement-bone. The stress intensity factors under mixed mode at the crack-tip are calculated for different types of loading (from three activities: - Normal walking, - climbing up stairs, - down stairs). The obtained results shows that the crack initiated from a micro-interface by an intense type of loading can damage the cement, causes thus the loosening of the prosthesis.

Keywords: cement; implant; elliptical crack; stress intensity factors; interface; dynamic. Free vibration analysis of chiral double-walled carbon nanotube embedded in an elastic medium using non-local elasticity theory

K.Rakrak1, M.Zidour1, A.Chemi2, H.Ayat3

1Université Ibn Khaldoun, BP 78 Zaaroura, 14000 Tiaret, Algerie. 2Laboratoire de Modélisation et Simulation Multi-échelle, Université de Sidi Bel Abbés, Algerie 3University of Chlef, LPTPM, Esalem City, 02000, Chlef, Algeria.

Abstract: The transverse free vibration of chiral double-walled carbon nanotube (DWCNTs) embedded in elas- tic medium is modelled by the non-local elasticity theory and Euler Bernoulli beam model. The gov- erning equations are derived and the solutions of frequency are obtained. According to this study, the vibrational mode number, the small-scale coefficient, the Winkler parameter and chirality of double- walled carbon nanotube on the frequency ratio (χN) of the (DWCNTs) are studied and discussed. The new features of the vibration behaviour of (DWCNTs) embedded in an elastic medium and the present solutions can be used for the static and dynamic analyses of double-walled carbon nanotubes.

Keywords: Vibration, Nanotube, Zigzag, Armchair, Chirality, Non-local

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

The Study of Structural, Electronic ,Mechanical Properties and Transition Phases of Rutheni- um Oxide 1,* 2 N. Mehtougui , D. Rached

1University of Djillali Liabes, LMM Faculty of Sciences Sidi Bel-Abbes 22000, Algeria. 2University of Djillali Liabes ,LMM Faculty of Sciences, Sidi Bel-Abbes 22000, Algeria

Abstract: we theoretically study the structural stabilities, elastic electronic and mechanical properties of dioxide material by using the full-potential linear muffin-tin FP-LMTO meth- od, in the framework of the density functional (LDA) for the exchange correlation func- tional the ground state properties including lattice parameter, bulk modulus are in good agreement with the available data. This compound is found to undergo a series of structural phase transitions under high pressure. the sequence of the structural phase transi- tion is : rutille → marc site → pyrite → fluorite that occurs at around 4.92, 22.9 and 100..6 GPa ,respectively. the elastic constants Cij for RuO2 in its different structure are calculat- ed using the energy variation with strain technique band structure calculations show that this compound is a narrow band gap semiconductor with 0.47eV in fluorite structure while for other structure this compound present a metallic character. Key words: full-potential linear muffin, Ruthenium oxide, LDA, phase transition.

Reliability of simulator driving tool for evaluation of sleepiness, fatigue and driving Performance

B. Soulmana2,, S. Boukebbab2,, M.S. Boulahlib3 Z. Dahia4 1, 2, 3, 4Laboratoire Ingénierie des Transports et Environnement, Faculté Science de la Technologie, Université des Frères Mentouri Constantine 1, Campus Universitaire Zarzara 25017 Constantine, Algerie

Abstract:The Study objective: To compare the impact of extended wakefulness (i.e., sleepiness) and prolonged driving (i.e., fatigue) at the wheel in time of driving in highway conditions and Sub roads. Design: Participants drove on a simulator in a research laboratory or an open French highway during 4 hours for driving sessions. (9–13 AM), Participants: 31 drivers (20 for males 11 females; mean age ± SD = 22.3 ± 1.6 years), free of sleep disorders. Measurements: reaction time ResultsCompared to highway and Sub roads sessions under sleepiness , driving performance were affected by driving in highway thus increased self-perceived fatigue . Extension of driving duration affected highway performance nonlinearly and more severely than that of sub-roads Conclusions: In healthy subjects, the highway appropriately measures driving impairment in terms of reaction time related to extended wakefulness.

Keywords:sleepiness, simulator, reaction time, Sub-roads.

Optimization of the Preventive Maintenance of a Repairable System A Case Study

A. Zakaria DAHIA1, Ahmed BELLAOUAR 2,, Billel SOULEMAN3 1University Constantine1, Constantine, Algeria 2University of Constantine1,Constantine, Algeria. 3University Constantine Constantine, Algeria

Abstract: The mastery of the maintenance of industrial facilities, particularly the cost and reliability of imple- menting preventive maintenance strategies, is very interesting because of the growing importance of this service in production lines. This paper addresses the problem of determining optimal intervals of preventive maintenance for pro- duction systems. The maintenance planning gas turbine ms5002 uses in SONATRACH electrical sta- tion is considered a case study. The document proposes a new optimization model that incorporates several criteria. For our case study, two criteria, the availability and the expected costs, are taken into account, the objective is to minimize the cost function of the preventive maintenance of the system with respect a availability constraint and to propose a plan of action concerning the moments of maintenance. The results obtained have considerably improved the preventive maintenance plan of this system and, in the framework of anticipation they constitute a tool for decision support.

Keywords: Maintenance Costs, Reliability, Preventive Maintenance, Optimization, Maintenance Plan

Detection and control of surface defects by the gradient approach

S.Taleb 1, W.Lebbou 1 1Research Center in Industrial Technologies CRTI P.O.Box 64, cheraga 16014 Algiers, Algeria

Abstract: The quality of flat rolled products is today one of the major stakes of the iron and steel industry. In this work, we address the detection of surface defects of hot-rolled sheet by artificial vision. We are particularly interested to straw defects. Our method is based on the edge detection by the gradient ap- proach. We used two convolution masks, the Prewit mask and the Sobel mask. A comparative study allowed us to choose the most appropriate mask to highlight the contours of straws. Keywords: Artificial vision, contour, gradient, defect, straw.

Numerical Analysis of the Biomechanical Behavior for Both Kinds of Dental Structures

K.Bouzouina1 ,N. Djebbar 2., R. Hadj Boulenouar 3 and B. Boutabout 4 2University of Hassiba Benbouali, Esalem City, 02000, Chlef, Algeria 1,3,4University of Sidi Bel Abbes, LMPM, BP 89, Ben M’hidi City, Sidi Bel Abbes, 22000, Algeria.

Abstract: This study presents a three-dimensional analysis by finites elements method (FEM), the mechanical behavior of a dental bridge supported by implants. A comparative study was made between the biomechanical behavior of a dental prosthesis composed of three implants replacing successively the premolar and two molar and a dental bridge located between two implants. These two dental structures are subjected to the same masticatory loading (Corono-apical, Linguo-buccal and Disto- mesial). Our study aims to analyze numerically the stress distribution and level in two models developed with and without the presence of the dental bridge. The equivalent stress has been determined in the implant - abutment . Keywords: Dental prosthesis; Dental bridge; Implant-abutment; Von Mises stress and FEM.

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

Numerical modeling on the effect of loads on the behavior of total hip prosthesis

M. BENIDRIS1*, O. AKEL2, M. BEKADDOUR BENATIA 3, D. CHENINE 1, S. CHERID1 1Laboratory of technology and solid’s properties Faculty of Sciences and Technology, Abdelhamid Ibn Badis Univer- sity. 2Modeling and Simulation in Materials Science Laboratory, Djillali Liabès University, 22000 Sidi Bel-Abbes, Algeria. 3Electrostatics and High Voltage Research Unites IRECOM, Djillali Liabès University, 22000 Sidi Bel-Abbes, Alge- ria.

*Corresponding author: BENIDRIS MANSOUR

ABSTRACT The total hip arthroplastie remains one of the most current operations and it brings an undeniable relief for the patient who suffers from osteoarthritis of hip. If, for the specialist, the indication and the realization of such a gesture are current, for the doctor of first recourse, it is sometimes difficult to determine when to address the patient to the qualified center, if the preserving treatment has a place and until which stage of the evolution. The progress of technologies in tribological terms and design of the prostheses is in constant evolution, and the council to be given the increasingly pointed patient, the more so as this last has access to a crowd of in- formation of not proven quality. Nevertheless, the deformation and the wear of the components acetabulum es- pecially polyethylene, remains an inevitable mechanism, and unsealing appears long-term. The prevention of the unsealing of the prosthesis thus passes by a better optimization of the loads applied to the implant. This study relates to the analysis by the finite element method of the mechanical behaviours and frac- ture of cement of a total hip prosthesis. This one is articulated around two parts. The first phase consists in ana- lyzing the stress distribution in cement fixing the femoral implant at the bone. The results obtained showed that the normal and tangential stress distribution and their level depend on the nature of cement used for the fixing of the implant to the bone. In the second phase of this study we analyze the crack displacement in cement and the interfaces im- plant-cement. Our results showed that a crack initiated in cement of the distal zone is propagated in mixed mode, contrary with that initiated in the zone proximal which can be propagated only in mode II. Key words Total hip prosthesis, Implant, Cement, Finite elements method, Stress, Modes of fractures.

Properties Electronic, Structural and Magnetic of the Intermetallic RMgSn (R: Er, Nd) ternary CeScSi-type

O. AKELa, B. ABBARa, M. BEKADDOUR BENATIA b, S.CHERID c, M. BENIDRIS c a Modelling and Simulation in Materials Science Laboratory, Djillali Liabès University of Sidi Bel-Abbès, 22000 Sidi Bel- Abbes, Algeria. b Laboratoire de structure, Elaboration et applications des matériaux Moléculaires, Faculty of Sciences and Technology, Abdelhamid Ibn Badis University, BP 227, Mostaganem 27000, Algeria. cLaboratory of Technology and Solid Properties Faculty of Sciences and Technology, BP227 University of Mostaganem, (27000) Algeria

Abstract: Numerical Simulation using the full potential linear augmented plane wave (FPLAPW) method based on density functional theory (DFT) is applied to study intermetallic RTX. The structural, electronic and magnetic properties of the CeScSi-type ErMgSn and NdMgSn compounds have been investigated. A self-consistent calcu- lation of the electronic structure of these compounds was performed using the LSDA and LSDA+U method, where U is the on-site Coulomb interaction correction. The structural parameters have been analysed, total and partial densities of states. The results show a metallic ferromagnetic ground state for ErMgSn and NdMgSn in LSDA+U due to the strong hybridization between f-states of the Er and Nd, the results obtained are in a good agreement with experimental and theoretical values.

Keywords: Rare-earth compounds; Structural, Electronic structure, Magnetic properties, FP-LAPW.

Numerical modelling in friction lap joining of aluminium alloy and carbon-fiber-reinforced-plastic sheets N. Mahmoudi1 and M Medbeur2 1Faculté de Technonologie Université Dr. Moulay Taher, Saida, 20.000 Algérie Email : [email protected] 2 Faculté de Technonlogie Université Mustapha Stanbouli Mascara

Abstract: Multi-material combinations of aluminium alloy and carbon-fiber-reinforced-plastics (CFRP) have gained attention in automotive and aerospace industries to enhance fuel efficiency and strength-to-weight ratio of components. Various limitations of laser beam welding, adhesive bonding and mechanical fasteners make these processes inefficient to join metal and CFRP sheets. Friction lap joining is an alternative choice for the same. Comprehensive studies in friction lap joining of aluminium to CFRP sheets are essential and scare in the literature. The present work reports a combined theoretical and experimental study in joining of AA5052 and CFRP sheets using friction lap joining process. A three-dimensional finite element based heat transfer model is developed to compute the temperature fields and thermal cycles. The computed results are validated extensively with the corresponding experimentally measured results. Keywords: Friction stir welding, Aluminum alloy, CFRP, Numerical modelling

Forecast of Crack Propagation BehaviorIn The Total Hip Prosthesis

D. Charef1, B. Serier1,B. Mechab1 and R. Amri1

1 Department of Mechanical Engineering, Mechanics and Physics of Materials Laboratory University Djillali LIABES of SidiBel Abbes PB 89, Cité Ben M’hidi, SidiBelAbbès 22000, Algeria. [email protected] Abstract:The major inconvenient of Poly Methyl Methacrylate (PMMA) is the crack formation, this phenome- non takes place during the polymerization process which is the result of an exothermic chemical reac- tion. In this context, this study aims to predict the behavior of macro-cracks situated in the most heavi- ly loaded sites in newly used bone cement. In fact, the prediction of crack propagation directions in bone cement during exercising the most practiced activity by patients allows determination of the most favorable cracking directions and subsequently provides orientations for the studies aiming to fight against this phenomenon.

Keywords:Surgical cement, Biomechanics, Stress intensity factor, Dynamic loading, Finite elements.

A new model for monitoring the behavior of non-linear elasticity of concrete by damage mechanics

Rebiha Smahi 1, YoucefBouafia 1 1 University MouloudMammeri of Tizi-Ouzou, 15000, Algeria

Abstract:We propose in this work a newmodeltopredictthenonlinearbehavioroftheconcreteuntilthebreak. This model is determined by applying the principles of damage mechanics and fracture using the actual laws of non- linear behavior in unidirectionalofconcrete usually admitted in the continuous mechanics of materials (Sargin relations for compression [1] and relationship Grelat for the tension [2]). Byintroducingtwo variables ofdamage- The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria. applied in unidirectionalrespectively in tension (Y. Bouafia , R. Smahi, et al., (2014)) [3]. Theircombination- withthelawsofthecontinuummechanicsofmaterials (Hooke’sgeneralizedlow) [4], andthetheoryofthemechanics- damage (theoryoftheisotropyofthedamage, andprincipleoftheequivalentdeformation), bringsusto a lawofvaria- tionofthedamage in three-directionalapplied in bidirectionalandunidirectional(R. Smahi,Y. Bouafia , et al., (2015)) [5]. Allowedtodescribeandto follow the real behavioroftheconcrete, thevariationofthePois- son’sratioisnecesseryimposedbyintroducingtheeffectofhydrostaticconcretematerial,indicate a change in modulu- sofcompressibility. Whereas in the modulus is related to the change in volume and is independent of the variable which affects the Young's modulus. Applying relations changes adopted (evolution of Poisson's ratio, the damage evolution in unidirectional and bidirectional) and the confrontationsofthecalculationswith experimental results (behavior of the concrete inbiaxi- al compression and tension) allowed to describe and to follow the real behavior of the concrete and up to rupture.

Keywords:Concrete, damage, Nonlinear calculation, Rupture, Static, Poisson’s ratio, Hooke’s low généralized, finite element, Isotropy, volumetric damage, Deviatoric damage, unidirectional, Biaxial.

Electronic Properties of Two-Dimensional Nanostructures Systems Based on Layered Materials. Oualid Cheref1,3, Salah Eddine Benalia1,2, Djamel Rached1 1Laboratory of Magnetic Materials, Faculty of Exact Sciences, DjillaliLiabès University of SidiBel-Abbes, SidiBel-Abbès 22000, Algeria 2, AlgérieDepartment of Physics, Institute of Science and Technology, El-Wancharissi University Center of Tissemsilt, Tissemsilt 38100, Algeria

Abstract:This work focused on the study of quantum well superlattices based on III-V semiconductor materials. These heterostructures have interesting properties of a perspective structural and electronic. Quantum well superlattices are extremely interesting because of their new properties, which are radically differ- ent from both isolated atoms and conventional materials. In this paper we report first-principles study of the structural and electronic properties of bulk GaSb, AlSb and their (GaSb)n/(AlSb)m superlattic- es (where n and m are numbers of monolayers; n = 1, 2 ; m = 1, 2) in the zinc-blende phase (B3), by using the full-potential linear muffin-tin orbital (FP-LMTO) method in the framework of density functional theory (DFT) within the local density approximation (LDA) for the exchange correlation functional. We seek to more carefully and accurately assess the effects of different superlattices con- figurations on electronic properties and, in particular, to observe the dependence of band gap behavior on the layers used.

Keywords:FP- LMTO, Superlattices, Structural Properties, Electronic Properties.

First-Principles Investigation of Half-metallic Ferromagnetism Properties of DMSs Materials Oualid Cheref1,4, Salah Eddine Benalia1,2, Djamel Rached1 1Laboratory of Magnetic Materials, Faculty of Exact Sciences, DjillaliLiabès University of SidiBel-Abbes, SidiBel-Abbès 22000, Algeria 2, AlgérieDepartment of Physics, Institute of Science and Technology, El-Wancharissi University Center of Tissemsilt, Tissemsilt 38100, Algeria

Abstract:Using the first-principles calculations with the full potential linear muffin–tin orbital (FP-LMTO) method, we investigated the structural, electronic, and magnetic properties of Zn1−xCrxS-diluted magnetic semiconductors (DMSs) in wurtzite structures with varying concentrations (x = 0.0625, x = 0.125) of Cr. The electronic properties indicated that Zn1−xCrxS, in all concentrations, exhibited half- metallic ferromagnetic (HMF) behavior with spin polarization of 100%. The density of states showed a hybridization between the p(S) and 3d(Cr) states, which created an antibonding state in the gap that stabilized the ferromagnetic ground state linked to the double-exchange mechanism. Therefore, these compounds are highly likely candidates for spintronic applications.

Keywords:DMS, Electronic properties, Magnetic properties, Spintronics

Finite Element Modelling of Reinforced Concrete Frame using ANSYS by Discrete Reinforce- ment Modelling Approach

M. A. Bouarroudj *, Z. Boudaoud University of Larbi Ben M’hidi, University Pole Ain Beida, 04200, Oum El Bouaghi, Algeria

Abstract:The last generation of computers make the modelling aspect faster and cheaper than the experimental studies. The finite element analysis is widely used to study the different phenomena of materials and structures. This paper represents the modelling aspect used to model the concrete material using the finite element software ANSYS Workbench. This paper also represents a comparison of the experi- mental study of a bare frame experimented by Mehrabi (1996) and the numerical results obtained from the modelling of the same reinforced concrete frame that subjected to the monotonic loads. The results are compared in term of force-displacement curve and in term of crack patterns. The failure criteria used by ANSYS is also presented. The results show the capability of ANSYS software to pre- dict the behavior and the crack patterns of the reinforced concrete frame.

Keywords: Finite Element Analysis, Failure surface criteria, Concrete, Crack, Frame, ANSYS Workbench.

Quantum Well laser’s characteristics under stress

B. Bouabdallah1,,Z.Nabi1, A. Oumsalem2, B. Benichou3 1Condensed Matter and Sustainable Development Laboratory, Materials and Sustainable Development Department,UniversityDjillali LIABES of Sidi Bel Abbés, Algeria. 2Laboratory of Theoretical Physics and material physics, Chlef University, Algeria. 3Department of Electronics, Faculty of Technology, HassibaBenbouali University, Chlef 02000, Algeria.

Abstract:Nowadays, many studies focus on reduced sizes heterostructures as quantum well lasers managing their characteristics in optoelectronics. In addition to what they promise, nitride materials promise best feature compared to silicon. However, this one is not always suitable; in particular in the realization of optical sources because of its indirect band gap. Materials based on Nitride as GaN, InN, AlN, and their alloys are best alternatives and operate from infrared to ultraviolet and so achieve their operation in blue especially. Quantum well lasers have been developed extensively since they have many advantages, such as very low threshold current density, large modulation band-width, narrow static and dynamic line width, high output power and high lasing temperature. The quantum well laser's morphology is exposed to compression and tensile strain which occur be- tween its thin films. It’s certain that stress pose problems and difficulties in technology Industry but can performed the QW laser’s characteristics as enhancing its optical gain, reducing the transparency point and threshold current density too as it’s found in this study. Keywords:compressive stress, tensile stress, optical gain, Nitride materials, confinement factor.

Study of the elastoplastic behavior of an HDPE pipe

S. LIAMANI1 1University of Sidi Bel Abbes,UDL, BP 89, Cité Ben M’hidi, Sidi Bel Abbes, Algeria. [email protected]

Abstract: High density polyethylene (HDPE) has been widely used for many years for the pipelines of industrial installations. The range of these uses has extended to the building and public works: transport of gas, water, evacuation of waste water ... The objective of this study is to analyze by finite element method the breaking behavior of a high den- sity polyethylene pipe under internal pressure for different thickness using the ABAQUS calculation code. A criterion has been used to describe the crack behavior that is represented by the integral J. The results obtained show that the behavior of a horizontal crack is more dangerous and has a very important effect than a vertical crack. It can be concluded that the final rupture of the material there-

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

fore depends on the length of the crack, the thickness of the pipe and the internal pressure exerted on the polymer.

Keywords: HDPE; Rupture; Cracking; Integral J; Pressure; ABAQUS.

Numerical analysis of the prediction of the lifetime of bi-materials: type ceramic/métal B. Zaoui1, B. Mechab1, B. Serier1, M. Belhouari1 1 University of Djillali Liabes, kadi ben kadi city, sidi bel abbes, Algeria

Abstract: The elaboration of ceramo-metallic compound materials is carried out at relatively high temperatures, resulting in residual stresses in the vicinity of the interface. Added to commissioning constraints, these constraints can lead to premature damage to these materials. In this work, the finite element method is used for the analysis of the prediction of the lifetime of these materials. We show, in terms of the vari- ation of the rupture energies, that the cracks, initiated in the interface zones in the ceramic, are more unstable in mode I, II and III. The kinetics of propagation of the crack fall away from the interface. The elastic-plastic behaviour of the metal is considered in this study. The effect of several parameters: size, orientation, location of the crack, the elaboration temperature is highlighted. We show a reduc- tion in the lifetime of these materials in terms of increased breaking energies. Keywords: Finite element methods, crack, Interface Interaction, stress intensity factor, J-integral.

Flexural analysis of sandwich plates using a new quasi 3D plate theory Tarek Houari 1, Habib Khellafi 2, Mohammed Sid Ahmed Houari3, Mohamed Benguediab4, Mustapha Bendouba,5

1,4Département de Génie Mécanique, Faculté de Technologie, Université Sidi Bel Abbes, Algérie 3 University Mustapha Stambouli of Mascara, Department of Civil Engineering, Mascara, Algeria. 2,5 University Mustapha Stambouli of Mascara, Department de Génie Mécanique, Faculté de Technologie, Mascara, Algeria.

Abstract: In this paper, a refined higher-order shear deformation theory including the stretching effect is devel- oped for the analysis of bending analysis of the simply supported functionally graded sandwich plates resting on elastic foundation. This theory has only five unknowns, which is even less than the other shear and normal deformation theories. The theory presented is variationally consistent, without the shear correction factor. The present one has a new displacement field which introduces undetermined integral variables. Equations of motion are obtained by utilizing the Hamilton's principles and solved via Navier's procedure. The convergence and the validation of the proposed theoretical numerical model are performed to demonstrate the efficacy of the model. Keywords: FG Sandwich plates; new plate theory; bending; stretching effect; analytical modeling

Porosity effect on the mechanical behavior of Functionally Graded Plates Resting on Winkler- Pasternak Foundations

R. Benferhat*1,2, Hassaine Daouadji1,2, A. Rabahi1,2, M.E. Zagane1 1University Ibn Khaldoun, , Tiaret, Algeria 2Laboratory of Geomatic and Sustainable Development, Tiaret, Algeria

Abstract:The effect of porosity on bending and free vibration behavior of simply supported functionally graded plate reposed on the Winkler-Pasternak foundation is investigated analytically in the pre- sent paper. The modified rule of mixture covering porosity phases is used to describe and approx- imate material properties of the FGM plates with porosity phases. The effect due to transverse shear is included by using a new refined shear deformation theory. The number of unknown functions involved in the present theory is only four as against five or more in case of other shear deformation theories. The Poisson ratio is held constant. Based on the sinusoidal shear defor- mation theory, the position of neutral surface is determined and the equation of motion for FG rectangular plates resting on elastic foundation based on neutral surface is obtained through the minimum total potential energy and Hamilton’s principle. The convergence of the method is demonstrated and to validate the results, comparisons are made with the available solutions for both isotropic and functionally graded material (FGM). The effect of porosity volume fraction on Al/Al2O3 and Ti-6Al-4V/Aluminum oxide plates are presented in graphical forms. The roles played by the constituent volume fraction index, the foundation stiffness parameters and the ge- ometry of the plate is also studied..

Keywords:porosity, FGM plate, elastic foundation, bending and free vibration behavior. Hydrogenation of Benzaldehyde on MCM-41 Supported Copper-Based M.SADOU1,2*, A.SAADI and M.HADJ MELIANI2 1 Laboratory of Natural Gas Chemistry, Faculty of Chemistry, University of Sciences and Technology Houari-Boumediene, P.O.Box 32, El-Alia, Bab-Ezzouar, Algiers, Algeria. 2LPTPM, Hassiba Benbouali University of Chlef, B.O.Box 151, Chlef 02000. Algeria

ABSTRACT. We are reporting in this study the preparation of copper-based catalysts sup- ported on MCM-41 mesoporous molecular sieves with different Si/Cu ratios (10 and 50) via two steps: firstly, the synthesis of the mesoporous material MCM-41 by the hydrothermal method and secondly, the preparation of the supported catalysts by a wet impregnation meth- od. The structural and textural properties of the supported catalysts were determined using the atomic absorption spectroscopy (AAS), Fourier transform infrared spectroscopy (FTIR), X- ray diffraction (XRD), N2-physical adsorption and scanning electron microscopy (SEM) tech- niques. The catalytic properties of the supported materials have been evaluated on the reduc- tion reaction of benzaldehyde at atmospheric pressure and in the gas phase. The yields of the obtained hydrogenation and hydrogenolysis products (benzylalcohol, toluene and benzene) were highly dependent on the copper content and reaction temperature, and preferentially formed in the whole range of reaction temperatures 160-250°C.The observed selectivity of the hydrogenation and hydrogenolysis reactions towards the production of various products sug- gests the existence catalytic active species of different particle sizes in the two catalyzed reac- tions.

Keywords: MCM-41; Mesoporous material; Hydrogenation; Benzaldehyde; Copper.

Friction Welding of AISI 316steel : Mechanical Properties and Microstructure evolution

F. Arzour1, M. Hadj Meliani1, R. Suleiman2,A.A.Sorour2, T. Boukharouba3 1LPTPM, University of Chlef, LPTPM, Esalem City, 02000, Chlef, Algeria. 2Center of Research Excellence in Corrosion (CoRE-C), King Fahd University of Petroleum & Minerals (KFUPM), Dhahran 31261, Saudi Arabia 3Laboratoire de MécaniqueAvancée “LMA”, University of Science and Technology of HouariBoumrdine “USTHB”, BP., 32, El-Alia 16111 Bab-Ezzoaur, Algiers, Algéria

Abstract: In the first time, optimization of welding conditions to obtain a microstructure closest to that of the base metal. This optimization was made for a single parameter; the temperature must remain below the phase transformation line that is 926°C for AISI 316 [Nishio et al., 1971] and [Castro et al., 1974]. The results show that the microstructure of welded joint is built in the last three steps of the process. During the first step of friction phase, the application of friction pressure causes a cold deformation creates a mechanical deformation zone (MDZ_1). At the second step of friction phase, MDZ_1 leaves place for softening zone because of heat diffusion, with still remaining of friction pressure. Thermo- mechanically affected zone (TMAZ) creates at final this step of friction phase. The forging pressure application during the third step defined the microstructure of welded joint; the TMAZ is replaced by the second mechanical deformation zone (MDZ_2). Additionally, forging pressure application creates inside a new MDZ_2 a hard eccentric core around the welding center, precisely along the rotation ax- is. The micro-hardness of MDZ_2 is higher than TMAZ and less than MDZ_1. Post weld analysis The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

were investigated by micro-hardness measurements, SEM and tensile test, those illustrate the im- portant role of heat flux on the microstructure of joint through the welding process.

Keywords: Austenitic Stainless Steel, Heat Flow; Microstructure, Steps and Phases of Welding.

Structural and optical properties of a glass-ceramic in a ZAS system containing W2O5

A. Grabsi1,, A. Chorfa1 1University of Setif 1, The Institute of Optics and Precision Mechanics, Setif, Algeria. Abstract:Different pieces of a ZnO-Al2O3-SiO2 glass containing W2O5 was heat treated at 1090°C for 2, 8 and 4 hours as holding time, the glass ceramics obtained were characterized by colorimetric analysis and scanning electron mi- croscopy in order to identify the crystallin phases. in this work it was possible to identify the phase changes of the glass according to different temperatures, which allowed to draw the crystallization temperature of this glass. Al- so, the effect of the duration of heat treatment, and that of W2O5 have been studied from the phases that appear in the glasses.

Keywords:Crystallization, Glass, ZAS system, W2O5

Effect of Parameter of Confinement for Specimens DCB with U-notches D. Neggaz1,2 ,* , A. El-azzizi1,2, , M. Hadj Meliani 2, T. Nateche1,2, 1 Université de Sciences & Technologie Mohamed Boudiaf d’Oran 31000. Algérie 2University of Chlef, LPTPM, Esalem City, 02000, Chlef, Algeria.

Abstract: The research work outlined in this paper deals with the importance of the global approach with two parameters (K-T) or (K-A3) in the analysis of the linear elastic fracture mechanics, based on the effect of confinement according to the work of williams, in the field of structures under tension, for a U- shaped notch in the case of normalised specimens DCB. Its objective is to propose a numerical study, defining the stress intensity factor K and the transversal T-stress, applying the finite element method, in 2D, using the software ANSYS 12.1. We have proposed the method of line, inspired from the vol- umetric approach developed by Pluvinage. This method is based on the determination of effective stress Teff over an effective distance Xeff ahead of the notch tip. To cover a practical range, The defect depth ratio to the thickness was varied : a/w = 0.1 to 0.7. The notch acuteness radius was varied 0.25 This approach was used with success to quantitatively evaluate field of confinement at notch tip for different geometries and conditions of charging.

Keywords: Fracture Mechanic, API X52, Global Approach, Gaz Pipeline, T-Stress, notch stress intensity factor.

Numerical Study Stress Intensity Factors for CTS Specimens with U-notches Of Mixed-Mode L. Fodil1,2 ,D. Neggaz1,2, A. El azzizi1,2, M. Hadj Meliani2 1, Mechanics Department, USTOran, 31000, Algeria 2. LPTPM, FS, Hassiba Benbouali University of Chlef 02000-Algeria

Abstract: A failure criterion is proposed for ductile fracture in U-notched components under mixed mode static loading. The Compact Tension Shear (CTS) is the preferred test specimen used to determine stress in- tensity factor in the mode I, mode II and the mixed-mode fracture. In this work, the mode I and mode II stress intensity factors were computed for different notch ratio lengths 0.1

Keywords: : Constraint parameters, Mixed Mode, CTS specimen, Stress intensity factor.

Biomechanical Analysis of the Impact Effect on the Stress Level in the Elements of Dental Prosthesis N. Djebbar 1,*, A. Benouis2, K. Bouzouina3, R. HadjBoulenouar 4 and B. Boutabout5 1University of HassibaBenbouali, Esalem City, 02000, Chlef, Algeria 2University of MoulayTahar, Ennasr City, Saida, 20000, Algeria. 3,4,5University of SidiBel Abbes, LMPM, BP 89, Ben M’hidi City, SidiBel Abbes, 22000, Algeria.

Abstract:The study of impact velocity is relevant to the biomechanics of dental implants. The goal of this work was to determine the intensity and analyze the stress distribution in the component of the dental pros- thesis (crown, implant, and supporting bone), by rapid mechanical shock (impact), using a three- dimensional finite element model, each model was constructed with a mandibular segment of bone block, including an implant supporting a screwed metal–ceramic crown. The 3D models were built by SolidWorks computer aided design program, which is capable of input geometric features such as length, diameter, and profile to make drawings of the sample parts and assemblies.

Keywords:dental implant, bone, impact velocity, finite element method.

Arid environment impact on automotive paints adherence in scratch test: Influence of tiptype Z. Madaoui, M. Mendas,H.Zahloul, M. Abbadeni Laboratory of Rheology and Mechanics(LRM),HassibaBenboualiUniversity of Chlef, Algeria.

Abstract:In this work, the influence of indenter geometryon scratchingbehavior of automotive paints affected under Saharan arid environments is presented. Two different types of indenters used in microscratch test: a conical-shaped and a modified indenter using carbide blade. Samples used have 3, 5, 8 and 10 years of use. Both the tangential force and the frictional coefficient in the case of carbide blade are higher than those obtainedwith conical indenter.This is attributed to the displacement of larger volume of material which leads to a cutting mode than a ploughing mode.

Keywords:Scratch test, automotive paints, arid environments, tip type.

Experimental characterization of the metal sheet DC06EK used for sheet metal forming of sani- tary products in the EIMS. A. Belguebli15, I. Zidane2, A. Benhamou1, F.Cherchel 1University of Chlef, LME Esalem City, 02000, Chlef, Algeria 2University of Chlef, LRM, Esalem City, 02000, Chlef, Algeria Abstract:Deep drawing is a sheet metal forming processes widely used in EIMS Company. In this last, many losses concerning times and costs of sheet metal forming of sanitary products took place be-cause the rupture and the wrinkling defects especially with the aging of deep drawing tools. To reduce time and cost losses, it is necessary to carry out studies on the deep drawing operation on the DC06EK steel grade. In this context, we propose a metallographic analysis and an experimental characterization of the elasto-plastic behavior of the used sheet metal. The analysis performed on the microstructure and the experimental results obtained are globally acceptable. The results from these experiments can give an idea to the EIMS production unit on the material used in the sanitary products. Also, this experi- mental work contributes to the characterization of the sheet metal DC06EK. This is certainly the most used sheet metal category in all industries.

Keywords: Deep drawing process, DC06EK steel grade, experimental study.

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

Analytical investigation of a three-pad hydrostatic squeeze film damper compensated with elec- trorheological valve restrictors M. Benadda Mohamed1, M. Ahmed Bouzidane 1, Mlle. Asma Abed1,M. Aboubakeur Benariba1 1University of Tiaret, Laboratory of Industrial Technologies, zaâroura City,14000, Tiaret, Algeria

Abstract:Hydrostatic squeeze film dampers have shown their efficiency in supporting high load capacity with high stiffness and damping that are suitable to avoid rotor vibrations. However, the need of real-time control in recent rotating machinery has led to using semi-active control, by using smart lubricants, in order to obtain favorable static and dynamic characteristics without crossing dangerous vibrations val- ues. In this paper, a three-pad electrorheological valve hydrostatic squeeze film damper lubricated by a smart fluid is studied. The smart fluid used is a negative electrorheological fluidwhich has its viscos- ity decreases when applying an electric field. The lubricant is supplied to the hydrostatic bearing through three electrorheological valve restrictors. A static and dynamic study is done to understand the behavior of the electrorheological valve hydrostatic squeeze film damper according to the squeeze film and the applied electric field. The method used is the analytical method in the case of an infinite- ly long journal bearing. The results are discussed in the paper.

Keywords:Squeeze film damper, smart fluid, electrorheological fluid, analytical method, hydrostatic bearings.

Effect of crack shape factor on structural reliability of cracked pipeline-parametric study

A. Guillal1,*, N. Abdelbaki2, M.E.A.Bensghier1, M. Betayeb1 1Université M’hamed Bougara de Boumerdes,LFEP, 35000 Avenue de l’indépendence, Boumerdès, Algérie 2Université AkliMohanedOulhadj, Rue DRISSI Yahia - Bouira 10000, Bouira, Algérie.

Abstract:The variation of crackshape factor (a / c) during propagation plays a key role in the calculation of the stress intensity factor, where a poor estimate of the latter can lead us to an inaccurate estimate of the probability of failure. For the case of external cracked surface in oil and gas pipeline, such estimation can results undesired fault decisions like excessive repairs action or inspection planning. In this paper, the structural integrity analysis of pipeline with semi elliptical crack on the external surface is evaluat- ed. Reliability calculation is based on Monte Carlo simulation and First Order reliability Method (FORM). Results are expressed in term of reliability index β. Crack shape factors are varied to cover varieties of geometries from shallow to deep cracks while crack growth is assumed in depth direction. Two points are considered in SIF analysis, which are surface and deep point. Results of the analysis indicate that for a consrant crack depth a/t, the reliability index is strongly affected by a/c ratio and the trend is not similar in deep and surface point for different crack shapes.

Keywords:cracks, pipeline, reliability, failure index, stress intensity factor.

Study of contact parameters in 3D fretting-fatigue

F. Hamadouche*,H. Benzaama2,,M.Tahar Abbas 1 national polytechnic school,enpo, StreetD, EsSénia, Oran, Algeria. 2national polytechnic school,enpo , Street D, EsSénia , Oran, Algeria. 3 University of Chlef, LPTPM, Esalem City, 02000, Chlef, Algeria

Abstract:This paper presents a study of the contact parameters, form and materials with the finite element method FEM three-dimensions in a fretting-fatigue case. A parametric mesh composed of two bod- ies, a specimen including a crack and an indenter is studied by analyzing the contact problem in fret- ting fatigue. The stress intensity factors are calculated by varying the different parameters such as: the material, the friction, the size of the mesh as well as the form and dimensions of the crack. Intensity factor results for the three modes : K1 K2, K3 are obtained using Abaqus 6.14 .

Keywords:fretting fatigue, Finite Element Methode , Three dimension , crack, the stress intensity factors .

Critically Evaluating Mechanics of Structure Genome-Based Micromechanics Approach

M. Hamdi1, R. Zenasni1*, M. A. Khiat 1**2, 1University of Mostaganem, Laboratory [LMPC], Department of Mechanics, Mostaganem, Algeria Abstract: The objective of this paper is to critically evaluate the accuracy and efficiency of a general-purpose mi- cromechanics approach based on the Mechanics of Structure Genome (MSG), when it is applied to the constitutive modeling of 3D structures. The Generalized Method of Cell (GMC) is chosen as a reference method during efficiency evaluation. The predictions by Three-Dimensional Finite Ele- ment Analysis (3D FEA) are chosen as benchmarks during accuracy evaluation. Composites such as a continuous fiber-reinforced composite, a particle-reinforced composite, two discontinuous fiber- reinforced composites, and a woven composite are analyzed using MSG, GMC, and 3D FEA. During homogenization, MSG is found to be as accurate but much more efficient than 3D FEA, and despite high efficiency, GMC is found to sacrifice accuracy for efficiency. During dehomogenization, MSG is found to be as accurate as 3D FEA, but GMC is found not to be so accurate. The fidelity of MSG, when it is applied to the modeling of other structures (e.g., beams, plates, and shells), can be similarly evaluated. Keywords: Homogenization, Dehomogenization, Effective properties, Local fields, Efficiency.

Performance Analysis of the electrical characteristic in the short channel n- MOSFET transistor

N. Bourahla1, B. Hadri2,, A. Bourahla 3 1,3 University of Abd Elhamid Ibn Badis, ECP3M, Site II, 27000 Mostaganem. Algeria 2University of Abdelhamid Ibn badis, LEOG, BP227, 27000, Mostaganem. Algeria.

Abstract: The reduction in the dimensions of the MOSFETs devices results the appearance of short channel ef- fects [1.2], in this work we present by simulation the manufacturing technology [3] of this device and the short channel effects due to this reduction of this geometry using the two dimensional TCAD- SILVACO simulators by their two modules ATHENA and ATLAS [4.5]. We are interested on the variation of the channel length Lc, but we keep the same dimensions of transistor. Then we will mini- mize this length Lc. The values obtained from the analysis of the effects of short channel for the n- MOSFET transistor with a channel length Lc = (0.5, 0.15 and 0.025) μm are studied. The results is ob- tain an excellent value of the variation of the threshold voltage Vth=0.15 V for the shorter length Lc=0.025 m also for the subthreshold slope (SS) which remains permissible SS = 70 mV / decade. This length can represent a better value for DIBL (Drain barrier Lowering), and then the current ION increase considerably with the narrowing of the channel to 25 nm whereas the off current Ioff is dete- riorate, so this electrical characteristic improved the increasing of performance (speeder and reliabil- ity) of device.

Keywords: MOSFET, Modeling, SCE, TCAD-SILVACO.

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

Study and development of an expert system based on neural networks for the diagnosis of bearing defects S.DjABALLAH 1 , M.TEDJINI 2 K.KHALIL3

1University of Chlef, Esalem City, 02000, Chlef, Algeria 2 , Algeria 3 Universty of souk ahras, Algeria Abstract :Bearings, considered a crucial component in rotating machinery, are widely used in the industry. Bearing status monitoring has become an essential step in the deployment of a preventive maintenance policy. This work is part of the diagnosis and classification of bearing defects by vibration analysis of signals from defective bearings using time domain and frequency analysis and Artificial Neural Net- works (ANN). Based on the hypothesis of the presence of a single localized defect, the aim of this research is to de- scribe an expert system, which, from the temporal and frequency descriptors resulting from a vibrato- ry signal measured on a damaged bearing, is able to trace the source of the defect to predict its severi- ty and location. The originality of this research is not only to report the presence of a defect, but also to locate its location and assign a criticality in determining its diameter. The accuracy of the expert system developed in the selected configurations is of the order of 92.67% when determining the diam- eter of the defect, and 97.21% when determining its location. Keywords : Conditional maintenance, Diagnosis, vibratory, bearing, neural networks

Size effect of alumina abrasives on surface roughness of optical glass during mechanical pol- ishing process Farouq Abbas 1, Nabil Belkhir1

1Laboratory of Applied optics, Institute of Optics and Precision Mechanics, University Ferhat Abbas, Setif 1, Algeria. Abstract:Chemical mechanical polishing (CMP) is a process of smoothingand planarizing wafer and glass sur- faces by using a combination of chemicalreactions and mechanical forces. Numerous parameters are involved inthe material removal process, such as the type and size of abrasive, pressure on the surface, relative velocity between the polishing pad and the bulk, slurry chemistry, polishing pad, and substrate characteristics.This work focuses onthe mechanical part of the (CMP) process by studying the effect of alumina particles with different sizes (80 to1) μmdiameteron the surface roughness of soda lime glass, the findings of this study suggest thatlarger particles have better material removal rate however smaller abrasives gives better surface quality .

Keywords:alumina abrasives, mechanical polishing, surface roughness.

Relationship between ceria particles aggregation and sub-surface damage of optical glass during the CMP polishing process.

Farouq Abbas 1, Nabil Belkhir1

1 Laboratory of Applied optics, Institute of Optics and Precision Mechanics, University Ferhat Abbas, Setif 1, Algeria.

1. Introduction Polishing is a critical path to achieve optical surface during cold processing of optical glasses, the purpose of which is to shape the optical components to the desired form, to eliminate the damage, including surface and subsurface damage introduced by grinding, and to reduce the surface roughness which usually strongly influences the succeeding processes. Sub-surface mechanical damage (SSD) consists of surface micro-cracks created during grinding and/or polishing of brittle materials surfaces, such as glass. These surface cracks, typically identified macro- scopically as scratches and digs, are often hidden below an index-matched Bielby layer; hence they are all not detectable by visual inspection or standard optical microscopy until exposed by chemical etch- ing.

In the present work we study the behavior of solutions containing micro and Nano particles of (ceria1 and ceria2) by studying the aggregation of particles and the formation of colloids which are considered as rogue particles causing the sub-surface fractures or damage (SSD) the findings of this study suggest that particles with zeta potentials greater than +30 mV or less than−30 mV are considered strongly cationic and anionic, respectively , in other terms particles with high zeta values are considered stable and tends not to form colloids and aggregates.

Keywords: surface polishing, sub-surface damage, colloidal effect.

Verification of Fractal Distribution of Granular Grain Mixtures for Self-Compacting Concrete

A.Naimi1,,K. Chouicha1 1University of USTOMB, Oran 31000, Algeria Abstract:Self-compacting concrete has a more complex mix design compared to vibrated concrete. When look- ing into literature regarding self-compacting concrete, a wide range of materials can be noticed as well as a lot of different mix design approaches. This work aims investigate the different formulation of self-compacting concrete (SCC) using the fractal ap- proach. Precisely, prove that the studied granular mixtures for each concrete followed a fractal distri- bution by tracing fractals lines (Ncфi=f (фi) in logarithmic coordinates) and deduction of fractal di- mensions DF (The slopes of the adjusted straight lines).

Keywords:self-compacting concrete, fractal model, granular mixtures, fractal dimension.

First principles study of structural,electronic and magnetic properties of New Heusler Alloys Rh2MnZ(Z=Al, In) R. Nourine1, A. Benamara1 1*University of Chlef, LPTPM, Esalem City, 02000, Chlef, Algeria. E-mail address:[email protected]

Abstract: Recently, spintronic materials have attracted much attention due to their unique merits in data storage, transportation and processing. Half metals (HMs) are an important class of spintronic materials which have complete (100%) spin polarization at the Fermi level. Heusler alloys are defined as the ternary intermetallic compounds. At the stoichiometric composition, full Heusler alloys (X2YZ) crystallize in L21 structure with space group Fm3 m . The unit cell consists of four interpenetrating fcc sublattices with the positions (000) and (1/2, 1/2, 1/2) for X, (1/4, 1/4, 1/4) for Y and (3/4, 3/4, 3/4) for Z atom. The site (1/2, 1/2, 1/2) is vacant in semi Heu- sler compounds. In this paper we investigate theoretically the structural, electronic and magnetic properties of ternary Heusler compound Rh2MnZ(Z=Al, In) using the full-potential linearized augmented plane wave (FPLAPW) method in framework of the density functional theory (DFT).

Keywords: half-metal, FP-LAPW, spintronic, magnetic, Heusler.

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

PROPOSITION OF A METHOD FOR CALCULATING THE EQUIVALENT STRESS INTENSITY FACTOR FOR INCLINED DEFECT

M.A. MOUTASSEM1, A. A. ELAZIZI 1,, M. Hadj Meliani 2 1 Oran University of Science and Technology - Mohamed Boudiaf , El Mnaouar, Mail Box 1505, Bir El Djir 31000, Oran, Algeria. 2University of Chlef, LPTPM, Esalem City, 02000, Chlef, Algeria.

Abstract: For the purpose to propose a method for calculating the equivalent stress intensity factor for different crack orientations (bifurcation criterion in mixed mode including containment T). We chose a type of test specimen allowing to realize loading conditions in mixed mode I + II (opening + shear) and to simulate the shape of the crack. This is a specimen of the type “Brazilian disk” (indirect tensile test), this specimen proved to be perfectly adapted to our research in order to simulate numerically this phenomenon. From where we proceeded numerical modeling of the specimen "Brazilian disk" with two types of fragile bio-ceramic materials (AL2O3 alumina and Zirconia ZrO3) which are used in or- thopedic prostheses since 1965 and serve mainly in hip arthroplasty for the realization of the friction couples (head-cup). Alumina and Zirconia and their composites are considered "bio-inert" ceramics because they do not bond directly with the bone. Indeed, after implantation of a bio-inert ceramic, a fibrous capsule is formed and isolates the implant from the bone, thus limiting its integration [1].To show the influence of geometry notches on the fracture, three popular notch bottom shapes (circular U, triangular V and right ⊔) are proposed. this work is based on modeling and numerical simulation in three dimension 3D using the ANSYS software, The numerical simulation include two part : the first : concerns the crack bifurcation based on the criterion of maximum tangential stress (MTS) and the second : devoted to crack propagation applying the volumetric method to determine the Equiva- lent Notch Stress Intensity Factor and the containment parameter T which is introduced to model the field of elastic stress at the tip of a notch and to know the effect of the confinement of the structure and the load at the tip of the crack to enrich the Equivalent Notch Stress Intensity Factor K , for dif- ferent notch angle of inclination from 0 ° to 80 ° in a step of 10 ° (taking into account 45 °), where the latter can play an important role on security and design based on the fracture mechanic.

Keywords : mixed mode - crack, brazilian test, bifurcation angle, volumetrique aproche , T-stress.

NUMERICAL ANALYSIS OF MIXED BEAMS STEEL-CONCRETE SIMPLY SUPPORTED: STUDY OF THE SLAB-PROFILE INTERFACE M.A. MOUTASSEM1, A. SAHLI 2,, L. NOURINE 3 1 University of Science and Technology - Mohamed Boudiaf , El Mnaouar, Mail Box 1505, Bir El Djir 31000, Oran, Algeria. 2 UNIVERSITY IBNKHALDOUN OF TIARET , Mail Box 78 zaâroura 14000, Tiaret, Algeria.. 3 Preparatory School In Science And Technology Mail Box 64 CH2 ACHABA HANIFI - USTO - ORAN Algeria. Abstract:In the design of metal framework steel beams are dimensioned only to support all loads. But since the 50s, the use of mechanical connectors to connect the concrete slabs with steel beams became common, it made it possible to eliminate or reduce the slip at the steel- concrete interface so that the slab and the steel beam acts as a single element called “compo- site beam”. This work aims, to conduct a numerical study and optimization of design of steel-concrete composite beams connected by “headed studs” mechanical connectors or other connectors that are welded to the top of the steel beam flange. This design has several advantages compared to the traditional beam steel. For example transfer of efforts between the concrete and steel and the concrete-steel bond. This design has become increasingly rec- ommended in construction of bridges, multistage parking and in various industrial construc- tions. The main objective of this work was to develop three-dimensional finite element mod- els to make vérificatifs and comparatives studies between composite and non-composite beams for both types of slabs. That is to say, between solid slabs without profiled steel sheet and those with sheet steel profile ; On the one hand, on the other hand on composite beams

with different kinds of shear connectors (made of steel) of different shape either headed studs , stoppers made from various sections (sections T, U, V), disks or perforated plates (perfobond) . The finite element package “ANSYSS” was used for this study. Fifteen models of beams fixed in both ends were charged at mid-span from 100KN to KN with an increment of 100KN.

Keywords: Composite beam, modeling, finite elements, shear connectors, deflexion.

First-principles study on the Structural, Elastic and Electronic, Properties of BaThO3 Cubic Perovskite S. Mokrane*, 1, H. Bouafia2, B. Abidri 1, H. Moussa 2

1- Laboratoire de Génie Physique, Université ibn khaldoun .tiaret, 14000, Algérie. 2- Labroioire des Matériaux Magnétiques, Université Djillali Liabés, Sidi Bel-Abbes 22000, Algérie.

Abstract: First-principle calculations based on full-potential linearized-augmented-plane-wave method (FLAPW), as implemented into WIEN2k code were performed to study Structural, Elastic and Elec- tronic, properties of BaThO3 Cubic Perovskite. In this approach, solid and surface version “GGA- PBEsol” of the generalized gradient approximation (GGA-PBE) was chosen to treat the exchange- correlation potential. Structural results such as the equilibrium lattice parameter, bulk modulus as well as the elastic results such as elastic constants and their related parameters especially Poisson's ratio; Young modulus, shear modulus have been calculated. We note that there is a good agreement of our calculation results with experimental and theoretical available results.

Keywords: FP-LAPW, DFT, Perovskite, Elastic constants, WIEN2k.

The static analysis of the masonry walls under lateral and compressive loads Laib salaheddine 1, Atailia sara 1,, ,Meftah sid ahmed1

1University of Sidi-Bel-Abbes LSMAGCTP, Sidi-Bel-Abbes, Algeria Abstract: The present paper treats the static analysis of the masonry walls under lateral and compressive loads. For this goal a homogenization approach has been proposed for the determination of the anisotropic material properties of the masonry composites. The proposed model is based on the analysis of the periodic unit cells by mean of the micro modelling principle.

The main object of this model is to achieve satisfactory results for static analysis by the use of detailed micro-modeling techniques while keeping a reasonable computational cost. The proposed analytical model is compared with experimental data from the existing relevant litera- ture and the numerical results obtained via the finite element modelization of the masonry repetitive unit cell

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

The effect of plastic deformation of the metal joint on crack propagation in bi-materials Mourad Chama*1 andBelaïd Mechab1

1Laboratory of Mechanical and Physical of Materials (LMPM), University DjillaliLiabes of Sidi Bel Abbes, BP 89, Street Ben M’Hidi, Sidi Bel Abbes, Algeria

*Corresponding author, Dr., E-mail: [email protected]

Abstract. This paper presents a finite element based numerical model to solve three dimen- sional bi-material problems. A bi-material beam consisting of two-phase materials ceramic and metal modelled by finite element method. The beam is subjected simultaneously to mechanical and thermal loadings. The main objective of this study is the analysis of crack deviation located in the brittle material near the interface. The effect of temperature gradient, the residual stresses and applied loads on crack initiation, propagation and deviationare exam- ined and highlighted. Keywords:elasto-plastic; finite elements method (FEM); fracture mechanics; interface prob- lems; numerical methods; crack/ damage detection/identification.

Structural and Electronic properties of BaTiO3: DFT Investigation. H. Moussa*,1 , A. Bouazza3 ,H. Bouafia 1,B. Sahli1, S.Mokrane 2. 1- Laboratoire de Génie Physique, Université ibn khaldoun .tiaret, 14000, Algérie. 2- Labroioire des Matériaux Magnétiques, Université Djillali Liabés, Sidi Bel-Abbes 22000, Algérie. 3- Département de génie électrique, Université ibn khaldoun .tiaret, 14000, Algérie. Abstract: In this work, we studied structural and electronic properties of BaTiO3-cubic perovskite. Our calculations were carried out within the framework of the Density Functional Theory (DFT) using the generalized gradient approximation (GGA-PBE) for the treatment of exchange- correlation potential. We first optimized the perovskite structure by varying its volume around the equilibrium value. The obtained results are in good agreement with those found experimentally and for the cell parameter; the obtained value by GGA-PBE is the closest to the experimental one in comparison with that obtained by GGA-PBEsol. Band structures have shown that BaTiO3 is a semiconductor with a band-gap of 1.891 eV.

Keywords: FP-LAPW, DFT, Perovskite, WIEN2k. * Corresponding author. E-mail address: [email protected] (H. Moussa).

The Design of the Machines by the Flow Lines Method

M. BEKADDOUR BENATIAa, F. BEKKOUCHEa, O. AKELb, S.CHERID c, M. BENIDRIS c aElectrostatics and High Voltage Research Unit IRECOM, University Djillali Liabès of Sidi Bel Abbès 22000, Algeria b Modelling and Simulation in Materials Science Laboratory, Djillali Liabès University of Sidi Bel-Abbès, 22000 Sidi Bel- Abbes, Algeria. c Laboratoire de structure, Elaboration et applications des matériaux Moléculaires, Faculty of Sciences and Technology, Abdelhamid Ibn Badis University, BP 227, Mostaganem 27000, Algeria. cLaboratory of Technology and Solid Properties Faculty of Sciences and Technology, BP227 University of Mostaganem, (27000) Algeria

Abstract: The method of the lines of flow remains always a design method which could be applied by a very broad population of manufacturers for the design of the electric machines. It is an easy method to implement, founded on basic electromagnetism principles. Our article present in general a procedure of calculation of the reluctances of variable reluctance machines (6/4) starting from the use of the analytical relations which generate the electromagnetic principles of the machine. A new method based on the simple geometry and the trigonomet- rically one was used for the calculation of the reluctances of the lines which through the air-gap of the machine. The results of the design obtained by the flow lines method with the application of this new approach were checked by the finite elements method. Analyzes and the comparison of the margins of error remain acceptable.

Keywords: Method of Flow Lines, Machine with Variable Reluctance, reluctance of the air-gap, new approach,.

First-principles investigation of Structural, Elastic, Electronic and Magnetic Properties

of full-Heusler Alloys Cu2MnZ (Z=Si, Al, Sn)

H. Bouchenafa1,*, B. Benichou2 , B. Bouabdallah3, Z. Nabi3, A. Oumsalem2 1University of Chlef, Faculty of Sciences Exact and Informatics, Department of Physics, , Chlef, Algeria. 2University of Chlef, Faculty of Technologie, Department of Electronics, 02000, Chlef, Algeria. 3University of Sidi Bel Abbès, Faculty of Sciences Exact, Department of Physics, 22000, Sidi Bel Abbès, Algeria

Abstract: In this work, we have investigated extensively the structural, elastic and mechanic, electronic and magnetic properties of Cu2MnZ (Z = Si, Al and Sn) ternary Heusler alloys using the full-potential lin- earized augmented plane-wave method (FP-LAPW) based on the spin density functional theory (DFT) implemented in WIEN2k code within the genaralized gradient approximation of Perdew-Burke- Ernzerhof (GGA-PBE) for exchange-correlation functions. The spin-polarized band structure and den- sity of states reveal that the full Heusler alloys under study are ferromagnet metallic compounds. Elas- tic constants and various combinations of elastic moduli label Cu2MnAl and Cu2MnSn alloys as duc- tile and anisotropic in nature, whereas Cu2MnSi is not mechanically stable.

Keywords: ab-initio, Electronic and magnetic properties, Heusler alloys, FP-LAPW method, DFT.

Optimal operating characteristics of a GaN/Al0.8Ga0.2N quantum dot laser

H. Bouchenafa1,*, B. Benichou2, B. Bouabdallah3, A.OumSalem2 1University Hassiba Ben Bouali of Chlef, Department of Physics, 02000, Chlef, Algeria 2University Hassiba Ben Bouali of Chlef, Department of Electronics, 02000, Chlef, Algeria 3University Djillali Liabès of Sidi Bel Abbès, Condensed Matter and sustainable Development Laboratory, 22000, Sidi Bel Abbès, Algeria

Abstract: A calculation and optimization on the GaN/AlGaN three dimensional quantum box lasers parameters is given; based on the density matrix theory of semi conductor lasers with relaxation broadening cal- culation. It’s found a strong absorption and nonradiative recombination for 40A° which began to de- crease at 41A°. A significatif radiative interband recombination is noticed at 50A°. In order to optimize the parameters of the quantum dots lasers, a calculation of the gain spectrum, de- pending on well width of quantum box and carrier concentration is also shown.

Keywords: quantum dot, quantum-well lasers, optical gain.

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

Crack Path Predictions in Keyhole CT Specimen Using the MTS and MATS Approaches

O. Bouledroua1,2,, B. G. N. Muthanna3, M. Hassani4, D. Zelmati4, S. Khadraoui1 1Sonatrach/Division Technologies et Innovation, Avenue du 1er Novembre, Boumerdès, Algérie. 2University of Chlef,LPTPM, Esalem City, 02000, Chlef, Algeria. 3University of Chlef, LRM, Esalem City, 02000, Chlef, Algeria. 4Research Center in Industrial Technologies (CRTI), P. O. Box 64, Cheraga, Algiers, 16014, Algeria

Abstract:Crack path propagation is influenced by many parameters and can be irregular due to changes in stress distribution or in material properties as the crack progresses. This paper illustrates a comparison be- tween the classical maximum tangential stress (MTS) and the maximum average tangential stress (MATS) criterion, for predicting the crack path propagation of Plexiglas keyhole CT specimen in plan stress state. The use of the keyhole to make mixing mode crack path propagation. The maximum aver- age tangential stress (MATS) criterion in the fracture process zone ahead of the crack tip reaches its critical value and the crack growth direction coincides with the direction of the maximum average tangential stress along a constant radius around the crack tip. The tangential stress is described by the singular and non-singular (T-stress) terms in the Williams series solution. This approach was applied, using a finite element analysis (FEA) and comparing with the experimental result of a keyhole CT specimen, in order to estimate the importance of the non-singular (T-stress) terms on the crack path propagation.

Keywords:Keyhole CT, Crack propagation, MTS, MATS, T-stress, FEA.

Experimental investigation on pipe crack repaired by welding

Bassam Gamal Nasser Muthanna1*, Madjid Meriem-Benziane1,Ibrahim Gadi1, Walid Azzouz- Rached1 2University of Chlef, LRM, Esalem City, 02000, Chlef, Algeria. * [email protected], [email protected]

Abstract: Crude oil and gas transportation with much efficiency are very major feature for the global economi- cal field where they became the great challenge for the hydrocarbons companies. Despite of the seri- ous problems which occur during the transport such as the interaction fluid-solid, Pipelines have been used as the best solution to transport the energy safest in large volumes over great distance taking into consideration the nature of material, the quality of complex liquid ( with/without sulfur), geometry of pipeline and operating conditions such as the pressure and temperature. Due to the importance of me- chanical domain in this large industry, this work is examined by analyzing the defect problem of API X42 pipeline steel which was investigated by using the V-notch of Charpy shape with different crack depths. The obtained results showed that the effect the welding reinforced is still important operation as a solution for pipeline steels failure to repair the corrosion and erosion.

Keywords:API X42 pipeline steel,V-shape, Charpy,Crack, Fracture Mechanics, and welding

Numerical study of crack in the critical zones of the plug valve Ibrahim GADI1, Madjid Meriem-Benziane1, Bassam Gamal Nasser Muthana1 1 LRM, Mechanical Engineering Department, University of Chlef Po Box151, Chlef 02000, Algeria Corresponding author: * [email protected], [email protected]

Abstract:The aim of this subject is to predict the dangerous cracks of plug valve which are shown during the hydro- carbons transport under operating conditions such as the higher pressure and temperature. It is necessary to investigate about the causes of starting the cracks due to use the weld which became the major reason the defects during manufacturing. Three dimensional finite element method was used to predict the stress intensity factors taking into account the geometry of crack. The stress intensity factors for different posi- tions were determinated to study the crack behavior of plug valve. This study allows understanding the behavior of crack due to the energy of resulting from small cracks with internal pressure.

Keywords: Finite element method, plug, Stress intensity factor (SIF), Crack, Pressure

Theoretical study of halide perovskites CsAuI3

N. Mokhefi1, O. Sahnoun, N.Chelil , H. Riane1 1University of Mascara, LPQ3M, Mascara, Algeria.

Abstract: Discovery of new semiconductor candidates with suitable band gaps is a challenge for optoelectronic application .Solar cells based on halide perovskites have recently been attractive due to their excellent power conversion efficiency , lower cost and simple manufacture Structural,electronic and optical properties of tetragonal perov- skite CsAuI3 are calculated using the full-potential linearized augmented plane wave method in the density functional theory. The exchange-correlation potential is evalu- ated using the generalized gradient approximation.First-principles calculations demonstrate that CsAuI3 has an optimal band gap that is close to the Shockley– Queisser value.

Keywords: optoelectronic application , Solar cells, halide perovskites. STABILITY OF A TWO COMPONENT BOSE-EINSTEIN CONDENSATE IN QUASI-ONE DIMENSIONAL GEOMETRIES

S.MIRAOUI(1), A.HOCINE(1) and M.BENAROUS(1) (1)Laboratory for Theoretical Physics and Material Physics Faculty of Exact Sciences and Informatics Department of Physics HassibaBenbouali University of Chlef B.P.151, 02000 Chlef, Algeria E-mail :[email protected] ,Tél. : +213 0790454549 E-mail :[email protected] E-mail :[email protected],,Tél. : +213 559907262 ABSTRACT: We employ the Bogoliubov treatment to examine the effects of the dipole-dipole interactions (DDI) on the sta- bility of roton in the excitation spectrum of a homogeneous two-component dipolar Bose-Einstein condensate (BEC) in cigar shaped traps. We also discuss the immiscibility-miscibility transition of the mixture in terms of the orientations of the magnetic moments.

KEYWORDS: Bose-Einstein condensates, dipolargases, binarymixture, tilted dipole, the Bogoliubov treatment, coupled Grosse- Pitaiivski equation

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

Inverse Full Heussler‘s Alloy : Ag2LaB Properties.

Doctorant Chafia METAOUI Doctorant #1 , Professor Mohammed AMERI*2 # Physics Department, Physico Chemical Advanced Materials Laboratory. Sidi Bel Abbes University, ALGERIA.1 [email protected] * Physics Department, director of Physico Chemical Advanced Materials Laboratory ,

Sidi Bel Abbes University, ALGERIA.2 [email protected] Abstract: Research makes it possible to study deeply three inverse Heussler‘s materials , among them : Ag2LaB, in order to determine its specific properties : thermo dynamical , elastic , mechanical, acoustic , mag- netic, dielectric, optical, electronic , electrical, nuclear , chemical....., using them in different many technologi- cal devices like artificial advanced .

Keywords: Solid State Physics , Inverse Full Heussler ‘s Materials , Anharmonic Eigen Modes ‘s Vibrations , Elastic Coefficients , Thermo Dynamical Parameters , Functional Density Theory , Material‘s Techniques Characterization ,Synthetic Quantum Matter , Transport Phenomena.,

Contribution to study the structural, elastic, mechanical and electronic properties of Strontium filled skutterudite SrOs4Sb12

M. AMARI 1,* M. AMERI 62,, Y. Al-Douri3 I. CHERAIR4 M. BOUCHAREF5 1University of Sidi Bel Abbès LPCMA,BP 89 22000, Sidi-Bel-Abbès, Algeria 2University of Sidi Bel Abbès LPCMA,BP 89 22000, Sidi-Bel-Abbès, Algeria 3University of Malaya Nanotechnology and Catalysis Research Center (NANOCAT), 50603 Kuala Lumpur, Ma- laysia

3University of Medea 26000,Medea, Algeria 4University of Medea 26000,Medea, Algeria

Abstract: For predicting the physical properties we study the structural, elastic and electronic properties of Strontium filled skutterudite component SrOs4Sb12 using the full potential-linear muffin-tin orbital (FP-LMTO) calculation using the local density approximation (LDA) and local spin density approximation (LSDA). By minimizing the total energy and maintaining the value of volume cell fixed the lattice parameter, the bulk modu- lus and its derivative pressure were deduced after fit in to the Murnaghan’s equation of state. Then we have calculated the elastic constants in order to check the mechanical stability of this alloy. And for the shear modulus G, the Young modulus E, the Poisson’s ratio,the anisotropic parameter A, the ratio B/G and the Debye temperature () are deduced from the elastic constants.

Keywords: Skutterudites; Structural; mechanic; elastic; electronic; First-principles calculations

INHOMOGENEOUS PLATE BASED ON NONLOCAL VISCOELASTICITY THEORY

S. Hamzi1, I. Mechab 2,, 1. University of Mustapha Stambouli, LSTE ,Mascara 29000, Algeria 2. University of Sidi Bel Abbes, LMPM, 22000, Algeria

Abstract: In this study, the dynamic response of inhomogeneous plate made of functionally graded material supported by viscoelastic foundation is investigated. Through Hamilton’s principle and the nonlocal viscoelasticity theory. The nonlocal governing equations are derived and they are solved ap- plying exact method. According to the numerical results, it is confirmed that the proposed modeling can provide accurate frequency results for FG nano-plate as compared to some cases in the literature. This approach can serve as a benchmark against which other semi analytical and numerical methods based on classical plate theories can be compared.

Keywords: FGM plate, Kirchhoff plate theory, Non local viscoelasticity.

Study of the reliability of a pipe on the basis of the approach PENT

L. Alimi1,2, K. Chaoui2, 1Research Center in Industrial Technologies CRTI P.O. Box 64, Cheraga, Algeria 2 Mechanics of Materials & Plant Maintenance Research Laboratory (LR3MI), Mechanical Eng. Dept., BadjiMokhtar University, PO Box 12, Annaba 23000, Algeria,

Abstract: Nowadays it is established that SCG is the most likely cause of failure in transport systems using HDPE pipes. According to the PPI, the PENT (Pennsylvania Notch Test - ASTM D 1473) is a laboratory test performed to measure the slow crack propagation resistance SCG. A sample is cut from a compression molded plate or directly extracted from the tube. It is precisely notched and then exposed to a constant tensile stress of 2.4 MPa (348 psi) at a temperature of 176 ° F (80 ° C). The break time is recorded, and then a correlation be- tween this time and the life of the pipe is established under the actual service conditions. The PENT test has proven to be a very good indicator of SCG in PE pipes, a laboratory PENT value of 10 to 20 hours, should corre- late to a service life of at least 100 years, with very little rupture. Breaks in pipes, tanks, and enclosures can lead to extremely serious consequences. Until the beginning of the 2000s, these events were protected by taking secu- rity factors into account, which combined all the influential parameters with a purely deterministic methodology. However, this approach does not allow knowing the risks taken. In the structural reliability analysis, the influ- encing parameters are considered as random variables and, from a failure equation whose variables are proba- bilized, the probability of failure is calculated. Feedback and knowledge of degradation kinetics are two of the essential conditions for the application of structural reliability analysis. In the present study, a probabilistic ap- proach based on the PENT test is adopted to study the reliability of a polyethylene pipe. The estimated lifetime is calculated on a reliability-model. Several parameters are used to establish parametric analysis such as crack length, pressure and service temperature. The aim is mainly to use probabilistic tools to estimate the HDPE pipe lifespan reliably i.e. operating safely service. The reliability index β is given as a function of the size of the crack. The PENT test was considered and the values obtained from β are limited (the majority not accepted) ac- cording to the length of the crack. We note that for values of 100 µm

Keywords: Pipe, Crack, PENT, PHIMECA, Reliability index.

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

Numerical analysis of the effect of the pore-crack interaction on stress intensity in spot welds.

WN. BENALA1 , WN. BOUAFIA1.

1Belhadj Bouchaib University Center, Sidi Bel Abess road N101, Ain Temouchent, Algeria

Abstract: In the present study, a numerical study based on the finite element method (FEM) was con- structed to analyze the fracture mechanics of two welded plates by resistance welding. The breaking behavior of the welded structure is considered with the assumption of a crack at the interface of welded plates. The study was treated as a problem of the mechanics of elastic linear rupture, under the conditions of plane stresses. The simulation of the interaction of the defaults can be explained by the probability of the presence of these defects in the weld bead. Calculations were made using ABAQUS commercial-grade software. Modeling results high- light the dependence of stress intensity factors (CIF) on crack size, and gap distance (pore- crack) .

Key words: MEF, fracture mechanics, FIC, spot welding, stress.

Characterization of joints HDPE welded by FSW

LATEF M1,2, ZAHLOUL H2 ,BADIDI BOUDA A1, MEBTOUCHE A1 , ABBASE A1 1 Research Center in Industrial Technologies CRTI, P.O.Box 64, Cheraga 16014, Algiers, Algeria 2 Hassiba Benbouali University of Chlef B.P 78C, Ouled Fares Chlef 02180 Algeria

Abstract: The aim of this work is the characterization of high density polyethylene (HDPE) joints welded by the Friction Stir Welding (FSW) technique. The characterization is done by destructive testing (mechani- cal tensile tests) for welded joints. To do this work, a series of experimental tests were made by taking into account of several parame- ters: - the geometry of the welding tool (pin), the axial force Fz applied to the tool along its axis of ro- tation, to compensate for the pressure formed in the weld zone, the speed of rotation of the tool, the speed of advance of the tool, In this work, we only take into account of the last two parameters. The obtained results were satisfactory and show the influence of these parameters on the quality of the joint.

Keywords: polymers, HDPE, welding, FSW.

Identification of Johnson-cook material model constants and numerical modelling of Charpy impact test

L. Kerdja, Y. Fizi Laboratoire de Mécanique de Précision Appliquée, Institut d'Optique et de Mécanique de Précision IOMP Université Ferhat Abbas UFAS1, Sétif, Algeriay

Abstract:In this work, the Johnson-Cook material model constants for structural steel C45 have been determined by a method which integrates experimental test and optimization approach. In the first step, a quasi- static tension test was performed on three specimens with different load contact displacement rate. Next, the material model constants were calculated for it by iterative approach based on the minimiza- tion of a defined squared error on the evolution of equivalent stress. The material model constants identificated is then used to simulate the Charpy impact test using finite element method. The finite element simulation 3D has been carried out with using of ABAQUS/Explicit software. The influence of pendulum velocities has been also evaluated from a numerical point of view.

Keywords:Johnson-Cook material model, Charpy test, optimization, impact velocity, fracture.

Critical buckling load of chiral double-walled carbon nanotube Embedded in an elastic medium

A.Chemi1, K.Rakrak2, M.Zidour2 1. Laboratoire de Modélisation et Simulation Multi-échelle, Université de Sidi Bel Abbés, Algerie. [email protected] 2. Université Ibn Khaldoun, BP 78 Zaaroura, 14000 Tiaret, Algerie. [email protected]

Abstract: The transverse free vibration of chiral double-walled carbon nanotube (DWCNTs) embedded in elas- tic. In order to discover the non-local critical buckling loads of chiral double- walled carbon nanotubes (DWCNTs) Embedded in an elastic medium. In the present studie, the non-local Timoshenko beam theory has been implemented. The analytical equations are derived and the solution for non-local crit- ical buckling loads is obtained according to the governing equations of non-local theory. Influence of elastic medium, the vibrational mode number, the chirality of carbon nanotube and aspect ratio on non-local critical buckling loads of the (DWCNTs) are studied and discussed. The results indicate the dependence of non-local critical buckling loads on the chirality of single-walled carbon nanotube with increase the vibrational mode number and aspect ratio of length to diameter with and without elastic medium for different chirality’s of double- walled carbon nanotubes.

Keywords: Elastic medium, nanotubes, chirality, Buckling, Non-local.

Inhibitive properties, thermodynamic and quantum chemical studies of pyrazoline derivatives on carbon steel corrosion in HCl solution.

OdayKhamaysa1, IlhemSelatnia1,2, Assia Sid1, MerzougBenahmed3 1Laboratory of Analytical Sciences, Matrials and Envirromental (LSAME). Material ScencesDepartement. Larbi Ben M’Hidi University. Oum El Bouaghi. 04000. Algeria 2Laboratory of Applied Chemistry and Material Technology (LCATM). Material Structure Departement. Larbi Ben M’Hidi University. Oum El Bouaghi. 04000. Algeria. 3 Laboratory of Bioactif Molecules and Applications. Tebessa University, Route de Constatine,12000Tebessa, Algeria.

Abstract:The inhibition of the corrosion of carbon steel in 1 M HCl solutions by pyrazoline derivatives has been investigated using weight loss, potentiodynamic polarization and electrochemical impedance spectros- copy (EIS) techniques. Inhibition was found to increase with increasing concentration of the hydra- zone derivative but decreased with rise in temperature. The adsorption of this compound on carbon steel surface obeys the Langmuir’s adsorption isotherm. Potentiodynamic polarization measurements showed that pyrazoline derivatives act as mixed-type inhibitors. Further, theoretical calculations were carried out and relations between computed parameters and experimental inhibition efficiency were discussed.

Keywords: Corrosion; pyrazoline derivatives; quantum chemical; EIS

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

Quantum chemical and molecular dynamic simulation studies on the inhibition efficiencies of three pyrazine derivatives against corrosion of steel

IlhemSelatnia1,2* , Oday Khamaysa1, Assia Sid1, Merzoug Benahmed3 1Laboratory of Analytical Sciences, Matrials and Envirromental (LSAME). Material Structure Departement. Larbi Ben M’Hidi University. Oum El Bouaghi. 04000. Algeria. [email protected] 2 Laboratory of Applied Chemistry and Material Technology (LCATM). Material Structure Departement. Larbi Ben M’Hidi University. Oum El Bouaghi. 04000. Algeria. [email protected] 3 Laboratory of Bioactif Molecules and Applications. TebessaUniversity, Route de Constantine, 12000 Tebessa, Algeria.

Abstract:The adsorption and corrosion inhibition properties of three pyrazine derivatives namely: 2- methylpyrazine (MP), 2-aminopyrazine (AP) and 2-amino-5-bromopyrazine (ABP) on the corrosion of iron were investigated by performing quantum chemical calculations and molecular dynamics simulations. Global reactivity parameters such as EHOMO, ELUMO, energy gap (ΔE), chemical hardness, softness, have been calculated and discussed. The adsorption behaviors of these pyrazine derivatives on Fe(110) surface were investigated using molecular dynamics simulation. The binding energies on metal surface of studied compounds followed the order: ABP> AP> MP and this ranking obtained is consistent with the experimental data.

Keywords:Corrosion inhibition, Pyrazine derivatives, Molecular dynamics simulation.

ANTI- CORROSION ACTIVITY OF BIOSURFACTANT PRODUCED BYBACILLUS LICHENIFORMIS K. Mokdad1, R. Mehdaoui1, F. Mesbaiah2, A. Badis1 1Laboratory of Natural Products Chemistry and Biomolecules (LNSCB), University of SaàdDahlab of Blida1, P.O. Box 270, 09000 Blida, Algeria 2National Centre for Research and Development of Fisheries and Aquaculture (CNRDPA), 11, Bd. Amirouche, P.O. Box 67, Bousmail, W. Tipaza, Algeria Abstract: Biosurfactant-producing bacteria were isolated from a crude-oil-contaminated soil in HassiMessaoud (southern Algeria). Biosurfactant production was tested with Olive oil mill effluent as carbon source us- ing the surface tension measurement.After extraction and purification (separation chromatographic col- umn C18), the biosurfactant from Bacillus licheniformis has an interesting surfactant properties: low value of the surface tension (32 mN / m),a critical micellar concentration of a value of 750 mg l-1, gly- colipid nature and it is very thermally stable in a wide temperature range [4-70 °C], it has very good re- sistance in acidic and basic media [pH 2-12 ], also, effective in very salty environments (up to 250 mg/l), and it has a good emulsifying and antibacterial activity.This biosurfactant is used as inhibitor agent on the corrosion of carbon steel in 1 M HCl and their inhibiting action has been investigated by chemical technique as weight loss measurements and electrochemical techniques as potentiodinamic po- larization and impedance spectroscopy. The results obtained from all the methods employed are in good agreement. It was found that these surfactants act predominately as cathodic inhibitors. The inhibition efficiency increases with rising of the inhibitor concentration. Effect of temperature on the corrosion of steel in 1 M HCl with and without inhibitors has been studied in the temperature range 298-318 K. Some thermodynamic data have also been calculated.

Keywords: Corrosion inhibitors; Mild steel; Temperature effect; biosurfactant; Olive oil mill effluent.

Experimental and DFT studies on the Corrosion Inhibition of Iron Metal: Application to

the protection of gas and oil pipeline

Izzeddine SAMEUT BOUHAIK E-mail:[email protected], Laboratory for Theoretical Physics and Material Physics (LPTPM) Department of Process Engineering Hassibabenbouali University of Chlef (UHBC) Hay Salam N 19 Chlef, Algeria Presentation preference: poster

Abstract:This study deals with the understanding of the mechanisms controlling inhibitor ad- sorption on Fe (110) surface in 1N HCl acid solution in the temperature range of 25-60 °C. Several potential inhibitors were preselected; Tetraacetylethylenediamine (TEAD), caffeine, methylene blue.theoretical calculations were performed using the density functional theory (DFT).Quantum chemical calculations and molecular dynamicssimulations demonstrate thatcaffeine- hashigh tendency for adsorption on Fe(110) surface. Molecule dynamic simulations were per- formed at different temperatures[25-60 °C] to understand the different processes controlling the adsorption of inhibitors on Fe(110) surface.

Keywords:Corrosion inhibitor, DFT theory, Caffeine, Chemisorption.

Uniaxial compression effect on corrosion behavior of aluminum wire (AA1370)

Youcef Hadj Ali 1, Nacer Zazi, Rabeh Slimani, Djamila Kasdi1, Belkacem Koraichi1, Mohammed El Amine Faid1, jean- Paul Chopart2 1 Laboratoire de Mécanique Structures et Énergétique (LMSE), Département du Génie Mécanique, Faculté du Génie de la construction Université Mouloud Mammeri, B.P.17 RP, 15000, Tizi-Ouzou Algérie 2 LISM EA 4695 UFR SEN, BP1039, Université de Reims Champagne Ardenne, Moulin de la Housse, 51687 Reims, Cedex, France.

Abstract: In this work, the effects of compression uniaxial deformation on the corrosion behavior of AA1370 aluminum wire were studied. Axial compression with a compression density of 12.5, 25, 37.5 kN / mm3 was applied for samples 1, 2, 3 respectively. The results obtained show that the uniaxial com- pression induces the formation of sliding bands and the elongation of the grains in the plane perpen- dicular to the direction of the compression. The corrosion morphology of all the samples, after seven days of corrosion, in a 0.3% NaCl solution, shows a mixture of generalized and localized corrosion throughout the surface of the samples. Graphs of the potential of free corrosion show a decrease in the value of the deformed samples at the beginning of the corrosion followed by alight increase.

Keywords: Uniaxial compression, aluminum, corrosion, slide bands, deformation

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

Impact of green inhibitor compared with synthetic inhibitors for pipe corrosion in 1 M HCl me- dia

M. Soudani1, A. Mostefaoui1, B.G.N.Muthanna2, K. El-Miloudi1, M.H. Melian1,2,

1University of Chlef,LPTPM, Esalem City, 02000, Chlef, Algeria. 2University of Chlef, LRM, Esalem City, 02000, Chlef, Algeria. 3LE3M, University of Lorraine, Îlea of Saulcy, 57045 Metz, France

Abstract:The impact of the environment can cause many types of degradations such as pitting corrosion, stress corrosion cracking and sulphide stress cracking of metal structures, and one of serious prob- lems in the oil extracting industry is the corrosion process. Recently, a number of assets fail- ures caused by internal corrosion is recorded in the oil and gas industry. Reports have con- firmed that failures are due from the effect of HCl traces. Our objectives are to use the plant extracts, such as organic corrosion inhibitors. Indeed, these natural extracts contain many families of natural organic compounds – ‘green’, readily available and renewable. The mechanics tests carried out on a study of anti-corrosive properties of natural products - plant origin have so far given promising results of fracture mechanics properties. The importance in this area of research is mainly related to the fact that natural products can replace present toxic organic molecules, condemned by world directives as environmentally unacceptable.

Keywords:Three points pending, green inhibitor concentration, API 5L Steel. IDENTIFICATION OF BACTERIA CAUSING BIOCORROSION OF THE OILFIELD OF HASSI MESSAOUED A.THABET1, 2, C.FARES2, M.DOUANI1, M. SEBAIHIA3

1Laboratory of Plant Chemistry, Water and Energy Department of Process Engineering, Faculty of Technology, Hassiba Ben Bouali University of Chlef, B.P. 151, 02000 Chlef, Algeria. 2Laboratory for Theoretical Physics and Material Physics; Department of Process Engineering, Faculty of Technology, Has- siba Ben Bouali University of Chlef, B.P. 151, 02000 Chlef, Algeria. 3Laboratoryof Molecular Biology, Genomics and Bioinformatics,Hassiba Ben Bouali University of Chlef, B.P. 151, 02000 Chlef, Algeria.

Abstract: The purpose of this study is to investigate the phenomenon of bio-corrosion by identifying the bacteria involved in the bio-corrosion in the oilfield produced water by selecting the field of HassiMessaoud, in the south of Algeria, as a sampling site. Microbiological tests performed on water samples from dif- ferent points of the oily water treatmentchain show the existence of bacteria of the genus Pseudomo- nas, in particular the following strains: Pseudomonas putida, Pseudomonas stutzeri, and Pseudomonas aeruginosawhich are aerobic bacteria that have to be highlighted for their influence on metal degrada- tion. These bacteria will be isolated using isolation techniques on appropriate culture media. Key words:Microbial corrosion, Bacteria, metal, oilfield produced water.

The effect of operating parameters on the electrode dissolution and the dye removal of dye (red bemacid) from the industrial waste water

k. MAAMAR1, 2, C. FARES2, L. MAHMOUDI1, A. DJAFER3 1University of Chlef, plant chemistry- wate- energy 2University of Chlef ,LPTPM, Esalem City, 02000, Chlef, Algeria. 3University of Chlef,Water – Environment, Esalem City, 02000, Chlef, Algeria

Abstract: This work presents the study of the concentration of the dissolved oxygen, agitation and the concentra- tion of Na2SO4 addition on the electrode dissolution and dye red bemacid removal during electo-fenton process. The tests were carried out in an electrolytic cell at pH value of three, an ambient temperature and an applied voltage of 5V. This cell contained a stainseel (13.95cm²) working electrode and plati- num electrode (12cm²). The Color removals was selected as performance criteria. The results show that the red bemacid dye removal reached higher 86.24%

Keywords: Advanced Oxidation Process; Electro-Fenton; Rouge Bemacid dye; Stainsteel electrode; Dye Degradation; Wastewater treatment.

Particle Impact of sand on Internal surface of steel elbow

M. Amara1,,M. HadjMeliani2,,B. G. N. Muthanna3,M. Tahar Abbes1 1University of Chlef,LM.E, Esalem City, 02000, Chlef, Algeria. 2University of Chlef,LPTPM, Esalem City, 02000, Chlef, Algeria. 3University of Chlef,LRM, Esalem City, 02000, Chlef, Algeria.

Abstract:Erosion combined with corrosion becomes the most problem in the seawater desalination plant due to the fast deterioration of the internal line pipe. Corrosion products were characterized for surface mor- phology, phase composition and element concentration. In this paper, the prediction of erosion of sol- id particles in geometry of the elbow is performed by means of a numerical simulation. Fluid Dynam- ics (CFD) simulations with FLUENT software are performed to study erosion prediction in 3-D, 90° elbow for phase (liquid and solid particles), For a range of particle sizes from 2 mm ,0.4mm and 4µm for different valve opening angles in order to obtain the real tool failure reasons of erosion.

Keywords:Erosion-corrosion, pipeline erosion, fluid flow, sea sand.

A new approach based on 3D-FEM Eddy Current measurements for charac- terization of surface cracks

1Harzallah Salaheddine &2Nabile Ben hadda

1Universite zian achour de djelfa ,Built Environmental Research Lab., Civil Engineering Faculty, Uni- versity of Sciences and Technology HouariBoumediene, B.P 32 El Alia Bab Ezzouar, Algiers 16111 Algeria 2Université Hadj Lakhdar de Batna

ABSTRACT

A new approach based on experimental measurements and testing related to 3-D Eddy currents is consid- ered. Coupled equations are derived theoretically and obtained results from relevant applications are checked with those given experimentally. Surface cracks and defects detection are studied through two crucial fracture mechanics parameters, A simulation by a numerical approach using Finite Element dis- cretization of 3-D governing equations is employed to detect damaged zones and cracks. This approach has been used in the aircraft industry to control cracks and has shown consistency in its application to measured results and agreed with results obtained from other researchers.

KEYWORDS.:3-D Eddy Current, Non-Destructive Testing, Surface Cracks. Potential Magnetic Vector.

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

INHIBITION EFFECT OF FLAVONOIDS EXTRACT OF RUTA CHALEPENSIS ON THE CORROSION OF API 5L X52 STEEL IN 1M HCL MEDIUM Meryem Amal Benghalia1,2*, Chahinez Fares2, Abdelkader Khadraoui3, Mohammed Hadj Meliani2,4, Rami K. Suleiman5, Ahmad A. Sorour5, Ihor M. Dmytrakh6, Zitouni Azari4 1Laboratory for Water & Environment, Faculty of Technology, Hassiba Benbouali University of Chlef, B.P. 151, 02000 Chlef, Algeria 2Laboratory for Theoretical Physics and Material Physics, Hassiba Benbouali University of Chlef, B.P. 151, 02000 Chlef, Algeria 3Laboratoire de la valorisation des substances naturelles, Université Djilali Bounaama, Khemis-miliana, Algérie 4Laboratory LEM3, UMR CNRS 7239, 1 road d'Ars Laquenexy, CS 65820, 57078 Metz, France 5Center of Research Excellence in Corrosion, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran 31261, Saudi Arabia 6Karpenko Physico-Mechanical Institute of National Academy of Sciences of Ukraine, 5 Naukova Street, 79060 Lviv, Ukraine. * [email protected]

Abstract : The purpose of this study was to find the appropriate class of flavonoids extract from Ruta chalepen- sis leaves regarding inhibition efficiency in 1M hydrochloric acid solution. After flavonoids extrac- tion, the main corrosion performance of extracts components was studied using potentiodynamic po- larization, and weight loss methods. The flavonoids extracts were characterised using Fourier trans- form infrared (FTIR) spectra. The scanning electron microcopy (SEM) was used for morphological studies of the corroded and inhibed surfaces. It could be concluded that the methanol and chloroform extracts sufficiently inhibited the corrosion of API 5L X52 steel. Keywords : Ruta chalepensis, API 5L X52 steel, polarization and flavonoid

Dust ion acoustic solitary waves in nonextensive complex plasma with nonthermal ions

Abderrezak Berbri¹,Smain Younsi2and KhadidjaBenttayeb3

1,3Department of Physics, HassibaBenbouali University of Chlef , UHBC,route nationale N°19, OuledFarés, Chlef02000, Algeria. 2Faculty of Sciences-Physics, Theoretical Physics Laboratory, University of Bab-Ezzouar,USTHB, B. P. 32,El Alia, Algiers 16111, Algeria Abstract:

The aim of this work is to study the formation of dust ion-acoustic solitary waves in four components complex plasma containing of inertial negative ions, nonextensive electrons, non-thermal ions and negatively charged static dust grains. The linear properties are analyzed by using the normal mode analysis and the reductive perturbation method is used to derive the nonlinear equations, namely, the Korteweg-de Vries (KdV) standard. It is found that the basic features of dust ion acoustic solitary waves are affected by different plasma parameters (non-thermal parameter- parameter which deter- mines the population of non-thermal ions in our plasma model- electron nonextensive parameter and electron to ion temperature ratio).

Key words: Complex plasma, Soliton, Korteweg de-Vries standard (KdV) equation.

Numerical Investigation of Droplet Breakup With Cross-Junction Mini-ChannelUsing VOF method

T. Chekifi1 1Research Center in Industrial Technologies CRTI, P.O. Box 64, Cheraga Algiers, Algeria2University of Chlef,

Abstract: Numerical simulation using Fluent code is performed, to investigate droplet generation in cross- junction with VOF method. Droplets of water are produced by the shear stress applied by oil. Working at low Capillary numbers (Ca < 0.1), two configurations of cross-junction are studied; the first is a simple model no modification is performed at the outer channel, while the second model is character- ized by a lateral obstacle (chicane at outer channel). The effect of velocity ratio, viscous parameter, in- terfacial tension, flow condition on droplet size and frequency, the effect of lateral obstacles on drop- lets generation are focused and analysed. The numerical simulations showed that the velocity ratio and interfacial tension play an important role in determining the droplet breakup and non-breakup. In- creasing of flow rate ratio can be effectively used to decrease the droplet size. In addition, droplets produced in cross-junction with lateral obstacles are generally found to be larger than that produced with the first model. Moreover, the frequency of droplet generation was increasing by increasing of flow rate ratio. The numerical results show very good agreements with previous numerical and exper- imental works for the growth of droplet breakup, size and frequency..

Keywords:Water droplet; cross-junction; CFD, VOF and microchannel.

NUMERICAL STUDY OF THE INFLUENCE OF THE IMPACT HEIGHT ON THE THERMAL AND DYNAMIC BEHAVIOR OF A SWIRLING JET IMPACTING A FLAT PLATE

Amar ZERROUT a,*, Ali KHELIL a, LarbiLOUKARFIa aControl Laboratory, Test, Measurement and Mechanical Simulation, University of Chlef, Algeria, BP 151, 02000 Chlef, Algeria, E-mail: [email protected]

Abstract:Impacts jets are widely used in industry whose purpose is the thermal transfer of industrial objects or thermal comfort of premises.This work is devoted to the numerical study of the influence of the varia- tion of the impact height on the thermal and dynamic behavior of a swirling jet impacting a plane plate. The variables treated are the reduced velocity Ur the reduced temperature Tr and the number of Nusselt Nu.In order to concretize our study, we made the numerical simulation based on the method of the finite volumes by means of the mathematical model with two equations of transport (k-ɛ) for the closure of the equations of NAVIER-STOCKES and this, by using the code of FLUENT calculation for the numerical resolution of such a flow.The results found clearly show the influence of this factor on the thermal and dynamic characteristics of the impact jet. The (k- ɛ) model gave acceptable and confrontational results with available experimental results..

Keywords: Swirling impacting jet, impact height, flat plate, (k-ε) model.

Dimensioning of an individual air conditioner using solar energy

M.T. Mohammedi1, N. Belkacem2,, R. Aouine1, L. Loukarfi2 1University Hassiba Benbouali of Chlef, Essalam city, 02000, Chlef, Algeria. 2University Hassiba Benbouali of Chlef, LCEMSM, Essalam city, 02000, Chlef, Algeria.

 Corresponding author E-mail address: [email protected] The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

Abstract: Solar energy can be very beneficial for home installations. The objective of this study is to expand the solar air-conditioner market to residential, which represents an important environmental issue. How- ever, these processes are not yet economically viable because of their investment cost. This economic aspect remains a major obstacle to their development. In fact, conventional air conditioning systems are cheap and their electrical performance coefficients are equivalent to or even higher than those of solar air conditioning processes. This work allowed to predict the behavior of the solar installation as a whole for an ordinary room of 25 m² in the city of Chlef (Algeria). Thanks to the simulation it was possible to estimate the solar air conditioning production, the electrical consumption and the perfor- mances of the installation according to the external demands (solar radiation, outside temperature ...). The economic study of the installation has shown that the investment cost is refundable for 24 years.

Keywords: solar air conditioning systems, sizing, PVsyst software, cost-analysis study.

Study of realization of an hybrid water pumping system (photovoltaic-wind)

R. Si ali1, N. Belkacem2,, R. Aouine1, L. Loukarfi2 1University Hassiba Benbouali of Chlef, Essalam city, 02000, Chlef, Algeria. 2University Hassiba Benbouali of Chlef, LCEMSM, Essalam city, 02000, Chlef, Algeria.

Abstract: Renewable energies, such as photovoltaic, wind or hydro-electric, are an alternative to conventional energies and are increasingly used today. This type of energy is not only free and inexhaustible, but also very clean for the environment since it completely avoids the pollution produced by traditional sources. The use of hybrid energy (photovoltaic-wind power) for water pumping is well suited for most arid and semi-arid regions because of the existence in these regions of a little underground hy- draulic potential. deep, it is within this framework that we will study the sizing of a hybrid water pumping system (photovoltaic-wind) fully autonomous for an isolated site in the region of CHLEF province (North West of Algeria). System sizing methods that include the mathematical equations for sizing the system with the HOMER software. In general, the problem raised during the design of a water pumping system, by hybrid energy (solar photovoltaic-wind), is the high cost of the cubic meter of water pumped. To produce water at an affordable cost, it has been proposed to improve solar and wind uplift by solar panels and wind turbines to recover as much energy as possible (solar photovolta- ic - wind). In the interests of simplification and minimization of costs, it has been found that it is more interesting to store electrical energy in batteries and to use a storage of water in hydraulic tanks. The system obtained is then with a natural operation, and therefore a priori very reliable and at minimum cost. A detailed comparative economic study between the two techniques of pumping water, hybrid pump- ing (solar photovoltaic-wind) and pumping by electro-trogenous group, has shown that the technique of pumping by generating sets seems to be the least expensive at the beginning of the exploitation, but the hybrid pumping (photovoltaic solar-wind power) after a few years of operation (more than 10 years) remains the most profitable and becomes completely free.

Keywords: HOMER software, hybrid water pumping system, comparative economic analysis

Sizing of an off-grid photovoltaic installation

O. Hadji1, N. Belkacem2,, R. Aouine1, L. Loukarfi2 1University Hassiba Benbouali of Chlef, Essalam city, 02000, Chlef, Algeria. 2University Hassiba Benbouali of Chlef, LCEMSM, Essalam city, 02000, Chlef, Algeria.

Abstract: The search for a more reliable renewable energy system in isolated rural zones has brought about the off-grid photovoltaic systems. The techno-economical efficiency of this type of system is mainly de- pendent on solar energy resources, which are highly variable in time and according to the chosen site. To succeed an off-grid photovoltaic installation, this study presents the sizing method of the PV sys- tem for a house in Chlef province (North West of Algeria), taking into account its estimated consump- tion from the energy needs of the simulated house. The undersized installation lack of reliability, while oversized installation will lead us to a higher cost. In general, control of the overall sizing is based on different technical characteristics of the constituent subsystems of Photovoltaic Installation. Off-grid photovoltaic system was simulated with PV system software, on the basis of hypotheses and appropriate formulations. Energy losses, the geographic location, the shading, ... etc. have been taken into account in the simulation system. This has allowed make a better estimate of losses that can affect the overall performance of the installation. An economical solution is proposed to generalize and prof- itability this type of installation in Algeria.

Keywords: sizing, PVsyst software, off-grid photovoltaic system, cost-analysis study.

Optimization of a hybrid photovoltaic-diesel micro-grid Application to an isolated residential site in Chlef

M. Arif1, N. Belkacem2,, R. Aouine1, L. Loukarfi2 1University Hassiba Benbouali of Chlef, Essalam city, 02000, Chlef, Algeria. 2University Hassiba Benbouali of Chlef, LCEMSM, Essalam city, 02000, Chlef, Algeria.

Abstract: For sustainable development, recourse to the use of energy systems with renewable energy sources has become essential for the production of electricity, but the intermittency of renewable energies pose supply problems. In this case, at least one energy storage element then becomes mandatory to en- sure the continuity of the supply of electricity. These renewable energy sources and the associated storage elements thus constitute a hybrid system. In this study a hybrid micro-grid that combines re- newable energies (solar) and generator, has been designed to meet the energy needs of 40 isolated dwellings in Chlef (Algeria). The results show that this system has many advantages over the conventional system, while ensuring the continuity and availability of electric power generation. The low greenhouse gas emissions of this system make it even more valuable. While the storage system and photovoltaic technology with their high costs pose the biggest constraint to this kind of systems.

Keywords: hybrid photovoltaic-diesel micro-grid, homer software, cost-analysis study, ecological impact study. Impact of wall temperatures on turbulence and wind in the vicinity of the canyon

B. Medjahed1,, A. Benlefki 2 1Laboratory of Numerical and Experimental Modeling of Mechanical phenomena, University of Abdelhamid Ibn Badis, Fac- ulty of Science and Technology , Mostaganem, Algeria. 2Département de Génie Mécanique, Université des Sciences et la Technologie d’Oran MB, 31000 Oran, Algérie

Abstract: Our main contribution focused on the influence of thermal effects around buildings and, in particular, on the thermal boundary layer on facades in low wind conditions:

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

This research has shown that the thermal wall law formulation conventionally used as a condition for solid limits cannot be used for numerical simulations at the scale of buildings. Indeed, the possible mesh refinements on this scale do not allow describing the thermal limit layers whose thickness has been shown to be of the order of a few cm. The proposed work consists in exploiting the data of the numerical simulations to synthesize and to test a formulation of parietal thermal condition which is satisfactory for the considered applications. Numerical simu- lations will be done for the heated cube configuration using the commercial code (Fluent). It will be possible to envisage comparative simulations with a commercial code (CFX). There are a number of user-friendly, high- performance three-dimensional codes for predicting fluid flow by solving Navier Stokes equations using finite volume. The purpose of the numerical simulation performed is to assess the presentation of the model by com- paring the numerical results obtained by the two calculation software (CFX and Fluent) according to the dynam- ic and thermal study around a building.

Keywords: Numerical simulations, k- turbulence models, thermal effects, , heated wall, Urban canyon.

Aerodynamic Shape Optimization of NACA0012 Profile using DesignXplorer Method

Abd Ellatif AMOR1,; Ramzi MDOUKI2; Laarbi LOUKARFI1; Ahmed BETTAHAR1. 1University of Chlef,LPTPM, Esalem City, 02000, Chlef, Algeria. 2University of Tebessa, Street of Constantine, 12000, Tebessa, Algeria.

Abstract: This paper presents the implementation of optimization technique that treats the design of airfoil configurations. Where the design variables are handled by the Design Xplorer (DX) that used as part of direct search methods for optimization. The DX method provides an ac- curate way and statistical technique for computing the objective functions (Maximum lift; Minimum drag; Maximize the lift-drag- ratio of an airfoil NACA0012) with respect to the design variables. The results demonstrate that the DX method can efficiently and significant- ly improve the aerodynamic performance of the design in a shape optimization problem. Key words: Aerodynamic shape optimization, NACA 0012, DX, lift, drag, Ratio lift/drag.

CFD investigation and experimental analysis of Small Scale Solar Chimney Installed in Ouargla region

A. Azizi1, T. Tahri2,*, M. H. Sellami3,R. Belakroum4, L. Segni 3

1Mechanical and Energetic laboratory, Mechanical Engineering Department, Faculty of Technology, Hassiba Benbouali University, Chlef, 02000, Algeria. 2Laboratory of Electrical Engineering and Renewable Energy LGEER, Electrical Engineering Department, Faculty of Tech- nology, Hassiba Benbouali University, Chlef, 02000, Algeria. 3Process Engineering Laboratory, Process Engineering Department, Faculty of Applied Sciences, Kasdi Merbah University, Ouargla, 30000, Algeria. 4Laboratory of Dynamics, Interactions and Reactivity of Systems, Faculty of applied Sciences Kasdi Merbah University, Ouargla, 30000, Algeria.

Abstract:The solar chimney power plant is the one of the technologies for production of electricity, through the CFD simulations with experimental studies are carried out to study the effect of different parameters on the performance of small scale solar chimney power plants that has been installed in University of Ouargla. The aim of this study is a contribution towards understanding solar chimney power plant per- formance and control and may be useful in the design of solar chimney turbines. And also the results found confirm that this technology is suitable for the south east of Algeria that contains very hot and arid zones.

Keywords: Solar chimney; experimental; CFD; electrical power; Ouargla.

Elaboration and thermal behaviour of transition metal-Doped zinc sodium phosphate glasses

Kharroubi Mohamed1,*, Kalai Chafiqa2, Maghni Cherif3, Belahcene Abdelhak4 1 Ziane Achour University, Faculty of Exact Sciences and Informatics, BP 3117, 17000 Djelfa, Algeria 2Mouloud Mammeri University , Algeria 3Université Mohammed chérif messaadia BP 1553 Souk Ahras 41000 4University of Chlef, Esalem City 02000, Chlef, Algeria

Abstract: Glass samples with chemical composition Na2NixZn1-xP2O7 (x = 0, 1, 2 and 5 mol %) were prepared by melt-quenching technique. The thermal behaviour of samples was studied by dif- ferential thermal analysis and values of glass stability parameters were calculated. Also, the samples structure as a function of transition-metals ions content was explored and discussed. Keywords: Zinc Sodium Phosphate glasses, Thermal Analysis, Transitional-metals, Melt quenching.

Synthesis and Infrared Characterization of Transition Metal-Doped Zinc Sodium Phosphate Glasses

Kharroubi Mohamed1,*, Kalai Chafiqa2, Maghni Cherif3, Belahcene Abdelhak4 1 Ziane Achour University, Faculty of Exact Sciences and Informatics, BP 3117, 17000 Djelfa, Algeria 2Mouloud Mammeri University Tizi Ouzou, Algeria 3Université Mohammed chérif messaadia BP 1553 Souk Ahras 41000 4University of Chlef, Esalem City, 02000, Chlef, Algeria.

Abstract: In this work, the influence of transition-metals ions doping on the zinc phosphate glass has been investigated. A series of glass doped with Cu2+, Ni2+ and Co2+ at different ratio (1, 2 and 5 mol %) was synthesized by melt-quenching method. Glass structure was measured by infrared adsorption spectrum in the region of 400-4000 cm-1. Spectra were analyzed to determine the relative intensity of the bands responsible for the different phosphates units. The results indicate that phosphate network is depolymerized with progressive substitu- tion of transition metal content and inform the characteristic vibrations of units.

Keywords: Phosphate glasses, Fourier Transformation Infrared Spectroscopy (FTIR), Transitional-metals.

Numerical simulation of wind loads on linear Fresnel concentrator

H. Bendjebbas, M. Abbas Unité de Développement des Equipements Solaires. UDES. /Centre de Développement des Energies Renouvelables .CDER. Bou-Ismail.42415.w.Tipaza.Algérie. [email protected]

Abstract: Among all the concentrated solar technologies (CSP), the Linear Fresnel Reflector (LFR) is consid- ered as a very promising solution, because of its simplicity and installation cost and attractive design. This is partly due to relatively low wind loads exposition compared to other types of solar concentrators (Heliostats, Dish Stirling,.etc..). The effect of wind loads on the stability of the reflectors used in a Fresnel Linear Concentra- tion Plant must be confined to achieve a better design and economic profitability. The present work is a numeri- cal simulation of the effect of wind on the primary reflectors of the system. Wind flow, recirculation regions and the pressures on the mirrors were simulated. The results showed that this type of concentrator has a better stability in presence of strong wind.

Keywords: CSP, Linear Fresnel Reflector, Wind loads.

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

Numerical investigation of the vortex generator effect on aerodynamic performances of profile NACA 63-215

Z. Laffane1,*, F. Saidi1, Y. Boualia1,A. Sedini1,H. Benameur1 1University ofOran 'M-B’,Faculty of Mechanical engineering, Naval Aero-Hydrodynamic Laboratory, Oran, Algeria.

Abstract:In this investigation, a numerical analysis was performed to study the influence of vortex generators on the aerodynamic characteristics of NACA 63-215, commonly used in the design of wind turbine blades. the numerical simulation was done to obtain forces, the distribution of the pressure on the pro- files in each situation, that is to say, with and without the vortex generators, with the Reynolds number of 320 000.Thus, two Different sizes of vortex generators were put into simulation, they were placed at 10% of the leading edge pattern chord (0.1 C), with their vertices in the same order of magnitude of the estimated layer height local limit. The results showed an improvement in the maximum lift coefficient for our NACA 63-215 profile, in addition, the lift / drag ratio was also increased at stall angles of approach.

Keywords:Aerodynamic, CFX, Numerical analysis, vortex generator.

Numerical optimization of the hydrodynamic coefficients of an autonomous underwater vehicle (AUV)

A. Sedini1,F. Saidi1,A. Mokhtari1 1Laboratory of Naval Aero-hydrodynamics, University of Sciences and Technology, M.B. Oran, U S T Oran, BP1505 El M'naour, Algeria

Abstract:In the context of fluid-structure interactions, this article consists to the hydrodynamic coefficients analysis of a flow around an Autonomous Underwater Vehicle (AUV). Primarily used for surveillance of the ocean floor. A several operating scenarios of different configuration of the vehicle were con- ducted to evaluate an optimal geometry with the aid of combined system CFX-ABAQUS models. To thoroughly investigate these simulations, a depth analysis was conducted on the hydrodynamics coefficients with CFX and a sheer stress and deformation with ABAQUS. The numerical results obtained within these simulations shows a good agreement with theories studies.

Keywords:AUV,hydrodynamic Coefficient, turbulence model,CFD (Computational Fluid Dynamics),ABAQUS.

Contribution to the study of fluid-structure interaction phenomena - case of a heat exchanger

Malki Faiza1*, Abdelbaki Noureddine2, Hadjadj Ahmed3 1Faculty of Science and Applied Sciences, University of Bouira,, Drissi Yahia Street, 10000 2Institute of Science and Applied Technology –ISTA of Bouira, Drissi Yahia Street, 10000 3Faculty of Hydrocarbons and Chemistry_FHC, University of Boumerdes, Independence Avenue, 3500

Abstract: The interaction of a fluid with a structure (IFS) is a fundamental case study, part of the most studied problems in fluid mechanics or in aerodynamics. Because of its practicality, it is found in many fields of mechanical engineering, as well as in several technological applications of interest such as pipe- lines, marine structures and heat exchangers. So the dynamic behavior of a structure in coupling with a fluid changes in a remarkable way, a very important frequency drop is observed, it is caused by the exchange of kinetic energy between the fluid and the structure. This work consists of studying numer- ically the structural behavior of a carbon steel heat exchanger tube (Young’s modulus of elasticity = 208 Gpa, Poisson’s Rasio = 0.3, mass density = 7770 kg/m3), interacting with a fluid, using the finite element method. The code used is therefore Ansys, is the commercial code CFD and the k-ε model is the ideal model for our study. The fluid problem is formulated in pressure / velocity: it is a question of solving the conservation equations of mass and momentum, and to determine the pressure and veloci- ty fields in the fluid domain. The structural problem is formulated in displacement: it is to solve the equations of motion and determine the displacement field, deformation and the stress field in the structure domain. The numerical results obtained in this study show that the cylindrical tube oscillates inside and around the fluid. Forces due to the flow of the fluid induced deformations in the tube be- come quite important.

Keywords: interaction fluid-structure, flow induced vibration, deformation, finite element analysis.

Study of piston thermo-elastic behavior under thermomechanical loads for a set of materials

M. MECHALIKH1, A. BENHAMOU2,I.ZIDANE1

1Laboratory of Rheology and Mechanics (LRM), Hassiba Benbouali University of Chlef, Algeria. 2Laboratory of Mechanics and Energy(LM E), Hassiba Benbouali University of Chlef, Algeria.

Abstract:The piston material choice is a major factorduring the design stages of an internal combustion engines, due to theperformance and reliability constraints.This study is aselection assessment of an alternative from a set of materials used in a diesel engine piston type Deutz - F8L413. Materials used are steel, aluminum and cast iron. This choicemust satisfy a criterion of minimizing distortions to predict the clearance between the piston and cylinder.A finite element approach is used for thedeformation evalu- ation in a 3D model of the piston by means of the computer code Abaqus.Due to the geometric sym- metry, a structured mesh is created by tetrahedral elements. A first calculation is performed purely thermal conduction-convection mode in order to determine the temperature distribution. Thereafter, it will be coupled with the pressure field due to the loads and combustion pressure of the oil film aver- aged for the calculation of deformation.The comparison between these strains for different materials allows us to choose a variant in which the structure of the piston has a minimum radial deformation and therefore more efficient

Keywords:Piston,FEM, strain,thermomechanical

Numerical prediction of the power performances of aheat pipe

S. Dahamni1,2, H. Guetarni1,A. Benhamou1,2, A. Benarous2,3 1UniversityHassibaBenbouali of Chlef, Esalem City, 02000, Chlef, Algeria. 2LCEMSM Laboratory, Esalem City, 02000, Chlef, Algeria. 3UniversitySaadDahlab, Soumaa Road, 09000,Blida, Algeria.

Abstract:The simplest way to achieve a higher cooling rate is to move from single-phase heat transfer to two-phase one using heat pipe. The present investigation focuses on the optimal design of heat pipe components using a Matlab® routine, under specific operating conditions. The wick type capil- lary structure is the most important material in a heat pipe. Calculations on various variants of the wick structure as well as several working fluids (water, ammonia and sodium) are presented and dis- cussed according to heat transport limitations for a given operating temperature. The effect of the thermal limitations on the cooling power of the heat pipe is also predicted. The results reveal that the decay trend noticed on viscous, entrainment, sonic and boiling limitations is significant and continu- ous for a decreasing number of meshes. In fact, the capillary limit shows an increasing tendency up to a specific mesh number. Regarding the groove wick structure, as the groove number is decreased, the capillary limit decreases too. This behavior seems valid for three working fluids.

Keywords:heat pipe, wire screen wick, grooved wick, cooling power, heat transfer limit.

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

Numerical study Coalescence of water droplets on simple fibers Hazourli. Hamza1, Mohamed.Abdelouahab2,H.Merabet, H.Aouaichia,K.Chettah, S.Ghanaia 1 Research Center in Industrial Technologies (CRTI), P.O. Box 64, Cheraga 16014 Algiers, Algeria. 2Modeling Laboratory of Industrial Systems; University of Science and Technology Mohammed Boudiaf BP 1505 - Oran – Algeria

[email protected]

Abstract:A numerical study was performed on the coalescence rates of water droplets on single fibers positioned perpedicular to a moving emulsified fuel jet stream containing 1000 mg water / liter. A flow rate of 3 to 4 ft/ min was used during most of the study. The initial efficiency of coalescence of the emulsion droplets with a droplet on the surface of the fiber was about 1.0%, which rapidly decreased to a relatively constant level of 0.4%. The drops seemed to grow by acquiring free water in the main stream rather than the surface of the fiber. The initial growth rates of the droplets were the fastest on fiberglass, followed by teflon, nylon and dacron.A considera- ble amount of chains formed on the nylon fiber. In addition, the maximum size droplets that could be retained by a single fiber were 400 to 500 t ~ diameter for glass fibers and less than 100diameter for plastic fibers.The addition of 5 rags / liter of sodium sulfonate to the fuel resulted in zero coalescence and release of all the droplets formed on the fibers.

Keywords:Drops, equivalent diameter, terminal velocity, Fluent.

Growth Behavior, Relative stability and Magnetic properties of (n = 1-8; q = 0, ±1) clusters.

M. Benaida1,*, K. E. Aiadi1, S. Mahtout2 1 Laboratoire de Développement des Energies Nouvelles et Renouvelables en Zones Aride, Université de Ouargla, 30000 Ouargla, Algeria 2 Laboratoire de Physique Théorique, Faculté des Sciences Exactes, Université de Bejaia, 06000 Begaia, Algeria

Abstract: We report present systematically study ab initio calculations of the structural and energetic properties of neutral and charged of AsGe (n=1-8; q= 0, ± 1) clusters using the first principles pseudopotential simulated annealing within the generalized gradient approximation (GGA) of density functional implemented in SIESTA method. By considering lots of structures for each cluster sizes were researched and determined the lowest- energy isomers. The growth pattern behaviors and relative stabilities are analyzed from the binding energies, second-order difference of energies. Doping with As atom not enhances the stability of the Gen clusters. The properties magnetic are also calculated and discussed.

Keywords: Density functional theory, As-Ge clusters, Relative stability, Magnetic properties, SIESTA.

Structure Prediction and optical properties of CsSnI3 for solar Cell Applications. N.Chelil1*, M.Sahnoun1, H.Bouhani-Benziane1 and H. Mokhfi1 . 1 Laboratoire de Physique Quantique de la Matière et Modélisation Mathématique (LPQ3M) University of Mustapha Stam- bouli, Mascara, Algeria *email: [email protected] Abstract: CsSnI3 is an unusual perovskite that undergoes complex displace and reconstructive phase transitions and exhibits near-infrared emission at room temperature. Its crystal belongs to an interesting class of semiconducting perovskite which is currently used in thin film field-effect transistor made of organ- ics-inorganics hybrid compounds. We study the structural, electronic and optical properties of CsSnI3 by first principles using density functional theory (DFT) within the generalized gradient approxima- tion (GGA). Our calculations of the electronic properties including band structure and density of states show that CsSnI3 has a semiconductor character with direct band gap of 1,3 eV which is in a good agreement with theoretical and experimental results. Furthermore, the optical properties investigations reveal that this compound has application in solar cells and other optoelectronic fields. Keywords: Perovskite material, DFT and Optoelectronic properties.

Numerical Simulation of Laminar Natural Convection from a Discrete Heat Source in Horizon- tal Cylindrical Cavity filled with GNL

B. Ould said1*, M.A. Medebber1,2, N. Retiel1 , M. Senouci1 1 Laboratoire de Modélisation numérique et expérimentale des phénomènes mécanique Département de génie mécanique, Université de Mostaganem Abdelhamid Ibn Badis, UMAB, BP300, Route Belhacel, Mostaganem (27000), Algerie;

2 Mechanical Engineering Department, Mascara University, Algeria

Abstract: In this paper the natural convection in horizontal cylindrical cavity filled with GNL fluid has been numerically investigated. The upper wall of present enclosure is located at a constant discrete heat source and bottom wall is cooled. The governing equations were discretized by finite volume method and solved with Simple algorithm. In this article, the effect of two parameters consist of the Rayleigh number in range of 103≤Ra≤106 and Aspect ratio changed from 0.1 to 0.5 on the fluid flow and heat transfer rate have been examined. The obtained results present the effect of physical and geometrical parameters on the isotherms, streamline and average Nusselt number.

Keywords: Natural convection, horizontal cylindrical cavity, GNL fluid, Average Nusselt number.

Large-Eddy Simulation of Turbulent Jet Issued From Lobed Diffuser

S. Nechad1,*, A. Khelil1, A. Bennia1, L. Loukarfi1. 1University Hassiba Benbouali, laboratory C.E.M.S.M. B.P. 151, 2000 Chlef, Algeria

Abstract:In this work, we study in three dimensional thelarge-eddy simulation (LES) of turbulent jet issued from lobed diffuser, with a need for the development the industrial sector in the areas of heating and ventilating air conditioning of warehouses. The improvement of the mixing process on the air occu- pancy zones and reactive flows are based to the transition of the turbulence and the geometry of the diffuser. The objective is to study the influence of the lobes diffusers inserts on homogenization, and the air flow recirculation zone. The diffuser of the present study having lobes with wider aperture and low height was also compared with other diffusers inclined lobe at different angles the aperture outlet to obtain swirl form of the jet. These allow obtaining a good mixture, and the homogenization of air flows. The numerical simulation uses FLUENT commercial software, based on the finite volume method.

Keywords:Lobed mixing, Swirl, LES, Fluent, jet turbulent.

Improvement of heat transfer by the interaction of a swirling jet impinging:

Y. Bouhamidi1, A. Khelil, M. BRAIKIA , S.Nechad1,L. Loukarfi1

1Université HassibaBenbouali, laboratoire de C.E.M.S.M. B.P. 121, 2000, CHLEF, ALGERIE

Abstract:The main objective of this study is to numerically evaluate the influence of the geometrical disposition of the swirling diffuser on the improvement of the heat transfer in the enclosures. The results found will be exploited to improve the efficiency of air conditioning systems of administrative premises. The turbulenceRNGkεmodel , the k-ε RealizableRNG and K-w The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

SST model were used in this study, Several flow parameters are tested such as the effect of the swirling jet on homogenization and thermal stability in the room and the effect of multi- ple vortex jets on heat transfer in the case where the room contains heat sources. The com- parison of the numerical results obtained with those available in the literature was presented. Most of these comparisons are in good agreement with the experimental data. In the second part of this work.

Keywords:vortex jets, impactant jets, air conditioning, Model k-ε RNG, Model, k-ε Realizable.

Thermal characterization of a multi jet diffuser with lobes imbalances in temperature M. BRAIKIA a*, A. KHELIL a, L. LOUKARFI a, W. MEDAOUAR, H NAJIb,

aUniversity Hassiba Benbouali, laboratory C.E.M.S.M. B.P. 151, 2000 Chlef, Algeria. bLaboratoire Génie Civi & géo-Environnement (LGCgE- EA 4515), Université d’Artois/Faculté des Sciences Appliquées, F-62400 Béthune, France. Université Lille Nord de France, F-59000, France

Abstract:In order to reduce the blast effect in the diffusers, it is sought to reduce the axial velocity of the air by using attenuator devices using means for deflecting the air streams, in order to transform the axial component of the air. These in radial component, In the context of a building, the objective is both to reduce the size of air treatment systems to achieve energy savings and improve the thermal comfort of users, by solving the problem of the bad distribution of temperatures and fresh air in the room. A poor diffusion of the cold air jet in the spaces to be treated linked to a lack of mixing of the cold air conditioning jet with the hot air of this space leads to com- plaints of cold sensation, current and headaches. In this context, a series of experimental studies have been con- ducted on multi-jet air systems with lobed diffusers, to determine the influence of various factors, such as the temperature imbalance between the central jet and the peripheral jets. The characteristics and the structure of the multiple lobed jets making it possible to obtain a good mixture and a clear homogenization ambience of atmos- phere in the rooms and even in the combustion chambers

Keywords: LOBED JET, MULTI-JETS, THERMAL AND DYNAMIC HOMOGENIZATION, VENTILATION.

An experimental investigation of interacting swirling multiple jets M. Braikia 1, A. Khelil 1, H. Naji2, 3, *, L. Loukarfi 1

(1) University of Chlef, C.T.M.S. Laboratory, B.P. 151, 2000 Chlef, Algeria (2) University of Artois, Civil Engineering and geo-Environment Laboratory (LGCgE- EA 4515), F-62400 Béthune, France. (3) Lille University Northern France, LGCgE, F-59000, France

Abstract:This article deals with the experimental investigation of multiple interacting jets, which may be inter- ested in many engineering applications such as design of a ventilation supply device. The main objec- tive of this study is to achieve the best configuration for use in ventilation applications. To achieve this, several parameters have been considered and discussed such as the imbalance in temperature and diffuser orifices position with relative imbalance in flow rate between central and peripheral jets. Flow rate has been adjusted at Reynolds numbers Re0, ranging from 104 to 3.104. The present study is car- ried out under uniform heat flux condition for each diffuser, and air is used as a working fluid. Experi- ences concerning the fusion of several jets show that the resulting jet is clearly more homogenized un- der the influence of the central swirling jet. Highlights of such an investigation show that, if the rela- tive position of the central jet is higher, the radial spreading of the resultant jet is more important when all jets are in the same plane. This spreading is also improved compared to the case where the relative position of the peripheral jets is higher, thereby allowing to process a large volume of air. In addition, it becomes attractive to operate, especially when we aim premises homogenization.

Keywords: Experimental investigation; swirling jets; flow interaction; ventilation; multiple jets.

Numerical simulation of a flow past a cubic and cylindrical tube by the large scale simulation method (LES)

A.Khelil 1, M. Badrouni 1, M. Braikia 1, I. Bachir 1 , A. Zerrout 1

1University of Chlef, Laboratory of control, Testing, Measurement and Mechanical Simulation, B. P. 151, 2000 Chlef, Algeria

Abstract:A numerical simulation in three dimensions has initiated the flow around an obstacle of a cylindrical or cubic geometrical shape in a laminar or turbulent regime. In this study, the large-scale numerical Sim- ulation (LES) method using the fluent computer code has been used. This work allowed us to study the dynamic field velocity, pressure field and vorticity field. The results obtained for the two square and cylindrical obstacles for the laminar and turbulent regime were presented as curves and contours. For geometric configurations (cubic and cylindrical) the vorticity is greater in the turbulent regime than the laminar regime noting that the circulation zone is justified by a large depression and wider in the turbulent regime than in the laminar regime. For the cubic configuration, the circulation zone is larger than that in the cylindrical shape, so it is noted that the flow is more delayed in the cubic form than in the cylindrical form.

Keywords:Numerical simulation, Obstacle, LES and incompressible flow.

FIRE PROTECTION DURABILITY OF INTUMESCENT COATINGS AFTER ACCELERATED AGING

R. Thabet1, A. Benarous*2,3, L. Mesquita4 1Mechanical Engineering department, Faculty of Technology, HassibaBenbouali University of Chlef (UHBC), Po Box 151, Chlef, Algeria, [email protected] 2LCEMSM Laboratory, UHB Chlef, Algeria, [email protected] 3Mechanical Engineering department, Faculty of Technology, SaadDahlab University of Blida (USDB), Soumaa, Algeria 4ISISE, Polytechnic Institute of Bragança, Campus Sta Apolónia Apartado 1134, 5300-857 Bragança, Portugal, [email protected]

Abstract:The most common method of achieve the required fire resistance of structures and structural elements is using passive fire protection systems, being the intumescent coatings the fire protection material frequently used. This work presents a research study about the effects of aging on the fire protection performance of intumescent coatings. A commercial water based coating is submitted to an accelerat- ed aging cycle, using a QUV accelerated weathering tester. These tests aim to simulate 10 years of the coating natural aging according to the European technical approval guideline (ETAG N° 018). The coating durability is tested comparing the fire protection efficiency of small steel samples submitted to a constant radiant heat flux exposure from a cone calorimeter as prescribed by the standard ISO 5660. In total, 28 tests were performed on intumescent coating protected steel specimens, in which 14 spec- imens were tested before the hydrothermal aging test and other 14 after accelerated aging. The exper- imental test results of the steel temperature evolution shows that increasing the intumescent dry film thickness, an increase of the fire resistance time is attained. After the accelerated aging cycles, the coating lose their ability to expand, resulting in an increase of the steel temperature of approximately 200 ºC, compared to the samples without aging.

Keywords:Fire protection, intumescent coating, accelerated aging, fire resistance durability.

Dynamic study of multiple jet with lobed diffusers W. Medaouar1, M. Braikia1, L. Loukarfi1,A. Khelil1, H, Naji2 1 Laboratoire de Contrôles, Essais, Mesures et Simulations Mécaniques, Université HBC, chlef, Algerie. 2 LaboratoireGénieCivi&géo-Environnement (LGCgE- EA 4515), Universitéd’Artois/Faculté des Sciences Appliquées, F-62400 Béthune, France. Université Lille Nord de France, F-59000, France

Abstract:In this work, we present an experimental and numerical study of the dynamic field of a multiple turbu- lent jet with lobed diffuser, applied to comfort in residential premises. The objective is to improve the efficiency of air diffusion in the lower cost occupation zone by passive means of flow control. The The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

distribution of the speed will indicate the quality of the mixture. From the analysis of the axial and ra- dial velocity profiles of the resulting jet, it is clear that the interaction between the lobed jets induces a redistribution of the velocity in the mixing zone, while allowing a spreading of the jet. The compari- son between experimental and numerical results in terms of axial and radial velocity distribution shows good agreement. The turbulence model used (SST k-ω) was able to reasonably predict the dis- tribution of velocity over the entire studied domain.

Keywords :lobed jets, multiple jets, ventilation, experimentation, numericalsimulation.

Pressure distribution analysis of plain journal bearing under hydrodynamic lubrication.

A. GHALEM1,2,*, M. TAHAR ABBES2, A.SAHLI1

1University of Chlef, FSEI, Esalem City, 02000, Chlef, Algeria. 1University of Chlef, LME, Esalem City, 02000, Chlef, Algeria. 2University of Chlef, LME, Esalem City, 02000, Chlef, Algeria. 3University of Chlef, LME, Esalem City, 02000, Chlef, Algeria.

Abstract: A study of pressure distribution of a plain journal bearing is presented in this paper. In hydrody- namic lubrication, the pressure condition of the fluid is critical to ensure good performance of the lu- bricated machine elements such as journal bearings. Using the finite difference method, pressure field in the lubricant film was calculated in both the circumferential and axial directions. A program has been in written in FORTRAN 90 to determine the pressure profile and attitude angles. Moreover, the effects of variations in operating variables such as eccentricity ratio, load capacity and shaft speed of the journal bearing were calculated. Generally, the pattern of pressure distribution obtained was simi- lar trend to those reported in other studies in literature.

Keywords: plain journal bearing, pressure distribution, hydrodynamic lubrication, Fortran 90. Study of the performance of the hydrodynamic bearing

Mayas Saeed AbdullahABDELWAHAB1, Miloud TAHAR ABBES1, Bassam Gamal Nasser- MUTHANNA2 1Laboratory of mechanical and energy, University of Chlef,HayEsalem City, 02000, Chlef, Algeria 2Laboratory of rheology and mechanics, University of Chlef,HayEsalem City, 02000, Chlef, Algeria .

Abstract: The present work concerns the study of a short bearing in hydrodynamic lubrication. In a first part of the study of the bearing is an experimental examination which is carried out on a test bench TM 280 (GUNT) located in the hydrodynamics laboratory of the mechanical department in Chlef. The pres- sures are measured at 16 points in the axial and circumferential directions of the bearing by means of manometric tubes. The distribution of the pressure is analyzed according to the rotational speed of the trunnion and the temperature according to fixed loading cases supported by the bearing. In a second part of this study is an analytical investigationwhich is based on the resolution of the problem by the use of approximate solution of the Reynolds equation and abacuses for the determination of the mini- mum thickness of the lubricating film, the maximum pressure, the coefficient of friction, the flow of fluid and the movement by the calculation of the eccentricity. Keywords:Short hydrodynamic bearing, manometric pressure measurement, axial and circumferential pressure, optimal characteristics.

Study of Synthetic Jet flow fields using Numerical Simulation Z. Elkhaldi 1,*, L. Adjlout1, O. Imine1, P. Dančová2 ,and T.Vít2 1Marine Engineering Department, 31000 Oran, Algeria 2Power Engineering Equipment Department, 46117 Liberec 1, Czech Republic

Abstract: Synthetic jet actuator is analyzed using unsteady RANS CFD code. The analysis is made for the ac- tuator’s cavity. The study is based on numerical simulations of synthetic jets in cooling applications. The actuator is considered as having a piston-like oscillatory moving bottom wall with a given ampli- tude and frequency. Computations are performed for the 2D case using moving grid. Turbulence is modelled using k-ε model. The results are obtained using a CFX-CFD solver. The study presents the vortex dynamics and velocity profiles. It is expected that the study will lead to a better understanding of the behaviour of 2D synthetic jets.

Keywords: Synthetic jet actuator, actuator’s cavity, cooling applications, moving grid. Variational Approach of two component BOSS-EINSTAIN CONDENSATE

Atika MEHEDI and Mohamed BENAROUS Laboratory for Theoretical Physics and Material Physics Faculty of Exact Sciences and Informatics Department of Physics Hassiba Benbouali University of Chlef B.P.151, 02000 Chlef, Algeria [email protected] [email protected]

Abstract: We use the time-dependent variational principle of Balian and Vénéroni with a gaussian density oper- ator to derive the dynamics of a bose mixture with a general binary potential.We study the properties of Bose- Einstein Condensate .

KEYWORDS: BEC, TDHFB Equations, Anomalous effects, , Beyond mean field

Piston skirt profile and tribological performance analysis of piston-cylinder in elastohydrody- namic lubrication

M. Benbrik1, M. Tahar Abbès1,P. Maspeyrot2, M.Amara1, A. Dekkiche1 1University of Chlef,LME, Esalem City, 02000, Chlef, Algeria. 2University of Poitiers, SP2MI Futuroscope,Poitiers, France

Abstract:An optimum performance characteristics of piston skirt- cylinder liner in elastohydrodynamic lubrica- tion is developed in this paper. The behaviour of the piston secondary motion, in conjuncture with elastohydrodynamic lubrication and cavitation is described by a transient strongly nonlinear equations coming from the coupling of the dynamics equations and the universal Reynolds equation. The prob- lem is quite complex, a numerical method is used in this study. An optimum skirt curved profile, which maintains piston in optimum performance, is developed. Effects of the elastic deformation of the skirt and the cylinder on the secondary movement and the optimum performances parameters, skirt piston- minimum oil-film thickness, maximum lubricant pressure and friction- are analyzed. The re- sults show the importance of the EHD analysis which gives a real and accurate prediction of the pis- ton- cylinder performance. An application is made on a solid skirt piston of a V-8 direct injection die- sel engine truck which should be a powerful design analysis tool to increase the available engine pow- er.

Keywords:Elastohydrodynamic lubrication, secondary movement, optimum skirt profile, tribological parameters performance.

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

Numerical simulation of fluid-structure interaction of a wind blade turbine

M.S.Belghoula*,1 A. Benhamou2, Z. Madaoui3, A.Belahcene1

1University of Chlef, Department of Mechanical, Esalem City, 02000, Chlef, Algeria 2Laboratory of Mechanics and Energy (LM E), Hassiba Benbouali University of Chlef, Algeria. 3Laboratory of Rheology and Mechanics (LRM), Hassiba Benbouali University of Chlef, Algeria.

Abstract:The main purpose sought in the present work is to stimulate numericallythe fluid-structure of a wind blade and investigate the influence of dimensionlessnumbers such as, Reynolds and Cauchy use them an open source tool:OpenFoam-1.5-dev. For the fluid part of the problem, we use the finite volumemethod, whereas for the part concerning structure, we use the finite elementmethod.

Keywords:Fluid-structure interaction; wind turbine; simulation; Open Foam-1.5-dev.

Complementarity Algorithm For Solving Cavitation In Hydrodynamic Lubrication Of Piston Skirt Of Internal Combustion Engine

M. S. Abdelkader1, B. Abdsoufi1, T. A. Miloud1.

1University of Chlef,LME, Esalem City, 02000, Chlef, Algeria.

Abstract:This work was motivated by the need to understand the tribological phenomena intervening between the piston and the liner during a motor cycle. Experimental work on the lubrication of the shirt-piston system, especially at the level of the skirt, led us to develop a hydrodynamic lubrication numerical model using a Fortran calculation code. This allowed us to develop a calculation code that will be used for the analysis of lubricated systems taking into account the lubrication EHD taking into ac- count the cavitations phenomenon and the rheology of the film. The parameters of the piston-piston system of a reciprocating motor are numerous and highly dependent on .Grace with the more effi- cient numerical method, considerable progress has been obtained in the understanding of the tribolog- ical behavior of the shirt-piston system. A very important phenomenon that is the breakage of the film is certainly present in the film during the operation of the engine very little studied is highlighted in the code based on the modified Murty algorithm. This code allowed us to highlight the phenome- non of Cavitation in the lubricating film represents the difference between the filling parameter r and the thickness of the film. The Reynolds equation defines the hydrodynamic behavior of the oil film in the skirt / cylinder bond and the static and elastic equilibrium equations quantify the behavior of the structure. The equations are numerically solved by the newton-Raphson method after discretization of the finite difference equation..

Keywords:constraint, T -stress, effective distance, notch, finite element analysis.

BEC dark matter halos in the effect of local condensate depletion

A.LABADI (1), M.BENAROUS (1) 1University of Chlef, LPTPM, Esalem City, 02000, Chlef, Algeria. E-mail : [email protected]. Tél. : +213 664823145

Abstract: Cosmological data provide compelling evidence that about 95% of the content of the Universe resides in two unknown forms of energy that we call dark matter and dark energy, the first residing in bound objects as non-luminous matter, The possibility that the dark matter, which is required to explain the dynamics of the neutral hydrogen clouds at large distances from the galactic center, could be in the form of a Bose-Einstein condensate, In the present work, we use the BEC dark matter model in the effects of the anomalous density. We compare our results with the older results.

Keywords: BEC, Dark Matter. Solitonic solutions of Coupled nonlinear Schrodinger equation and Rogue wave structures

Halima BELKROUKRA,Houria CHAACHOUA-SAMEUT, and Mohamed BENAROUS Laboratory for Theoretical Physics and Material Physics Faculty of Exact Sciences and Informatics Department of Physics HassibaBenbouali University of Chlef

E-mail :[email protected]

Abstract: Using the Lax pair and Darboux transformationfor the coupled Schrodinger equations, we find analyt- ical solutions of a two-component Bose-Einstein condensate ,we get solitonicand Rogue waves solutions of Coupled nonlinear Schrodinger equations .

Keywords:Soliton,Bose –Einstein Condensates Coupled nonlinear Schrodinger equations Lax-pair and Darbouxtransformation,Roguewaves

EXPERIMENTAL THERMAL STUDY OF A FREE LOBED JET WITH FIVE LOBES

Abderazak BENNIA1*, Hachimi FELLOUAH2, Ali KHELIL1, Said NECHAD1, Larbi LOUKARFI1

1Laboratoire de Contrôle, Essai, Mesure et Simulation Mécaniques, Université Hassiba Benbouali de Chlef, Hay Salem, route nationale N° 19, 02000, Algérie. 2Department of mechanical engineering, Université de Sherbrooke, 2500 boul. Université, Sherbrooke, Québec, Canada.

Abstract: In this work, we present an experimental thermal study of a free lobed jet with 5 lobes applied to the residential heating and air conditioning systems. The installation contains a hot air blowing diffuser oriented from top to bottom as shown in the figure below. The temperatures of the flow were measured by a multi- functional thermo-anemometer. From the axial station 1De till the 7De, the secondary plane gives a weak radial spreading of the velocities contrary to the principal plan. At the end of the explored zone X=7De, the two axes are rejoined, which let us presuming that the lobed jet become circular and that is why the temperature profiles are identical. It is the same for the radial spreading for the two planes principal and secondary. This study allowed to test the performances of the jets produced by a diffuser equipped with lobes in terms of the air flow homogenization.

NUMERICAL THERMAL STUDY OF A FREE LOBED JET WITH FIVE LOBES Abderazak BENNIA1*, Larbi LOUKARFI1, Ali KHELIL1, Said NECHAD1 and Hachimi FELLOUAH2 1Laboratoire de Contrôle, Essai, Mesure et Simulation Mécaniques, Université Hassiba Benbouali de Chlef, Hay Salem, route nationale N° 19, 02000, Algérie. 2Department of mechanical engineering, Université de Sherbrooke, 2500 boul. Université, Sherbrooke, Québec, Canada.

Abstract: In this work, we present an experimental study of a turbulent jet issued from a lobed diffuser with five lobes applied to residential comfort. The aim sighted is to improve in the occupied zones, by a passive control The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria. mean, the ventilated air diffusion efficiency. The obtained results show the interest of the characteristics of this type of jet for its application to the residential heating and air conditioning systems. The numerical study has been carried out using the commercial software fluent based on the finite volume method. In order to improve the previsions of the turbulent methods, we tested three turbulence models LES/S-L, LES/WALE and the LES/K-ET in order to opt for the more adequate model relating to this type of flow. The numerical results ob- tained with the turbulence model (LES/WALE), were in a good accordance with the experimental results.

Optimize fouling time during pretreatment process for seawater desalination

A. Adda2,, S.Hanini2, M.Abbes 3

2Laboratory of Biomaterials and Transport Phenomena (LBMPT), Faculty of Science and Technology, University Yahia Fares of Medea, Algeria 3 Unit of Solar Equipments Development-UDES/EPST CDER, Head of research department: Cooling Systems and Water Treatment using Renewable Energies-FTEER, Tipaza, Algeria

Abstract:The impediment of the membrane technology is the fouling problem and consequently higher operat- ing and membrane replacement cost. Ultrafiltration (UF) membrane fouling is often encountered in water treatment. This problem is one of the acute problems suggested in the seawater membrane based desalination plants. Hence, better understanding of membrane fouling is not only the key to solve the problems In this purpose, this article presents an attempt to assess of the permeate flow, for a given membrane, taking into account various influencing parameters. For this, a mathematical model describing the phenomena is developed in order to control the ultrafiltration process and also to optimize the design of seawater pre-treatment installation by tangential ultrafiltration. The developed model of the proposed system has been numerically solved using the MATLAB Soft- ware and the results have been presented and analyzed. The results show clearly an adequacy of the suggested model and the results available on the literature.

Keywords:fouling, ultrafiltration, modelling, seawater, pretreatment

Effect of Rushton blade number and his spacing on the hydrodynamic and the Agitation Power Y. Kamla1, H. Abedessalam2, M.Chachi3 et H. Ameur4 , A. Belalia5

1, 5 Faculté de Technologie, Département des sciences et technologie, Université Hassiba Benbouali de Chlef, Laboratoire des sciences et ingénieries maritime 2,3 Faculté de Génie Civile, Département de Génie Civile, Université de la science et de la technologie d’Oran BP 1505 El m’naouer, Oran. 4, Centre universitaire de Naama 1 E-mail : [email protected] ;

Abstract This work is a numerical investigation of the flow of a Newtonian fluid generated by the rotation of a Rushton turbine. The topology of the resulting flow strongly depends on sev- eral parameters such as the geometric configurations of the system and the agitated fluid be- haviors. The governing equations, based on the k-ε model, are solved by the finite volume method. The velocity field profiles and the stream lines as well as the vortex size are present-

ed for several geometries made with numbers of blades and spacing ratios between the differ- ent agitators. Our simulation procedure was validated by comparing the results obtained with those of other experimental and numerical works. The confrontation of the results gave a good agreement.

Comparison of conventional and hydromechanical deep drawing process

M. Abbadeni1,7, I. Zidane1,H. Zahloul1, Z. Madaoui 1University of Chlef,Rheology and Mechanics Laboratory,Esalem City, 02000, Chlef, Algeria.

Abstract:A two-dimensional finite element analysis has been performed using the finite element code ABAQUS/explicit to investigate hydromechanical deep drawing and conventional deep drawing pro- cesses.Simulations of the two processes are carried out and the simulated results are compared. Large plastic deformation is observed at the punch-blank contact zone and at the die corner. The difference in the plastic deformation distribution between the hydromechanical deep drawing process and the conventional deep drawing is due to the friction effect which is one of the major features of the hy- dromechanical deep drawing process.The formability of the blank is also examined. The result shows that the hydromechanical deep drawing process gives better formability than the conventional deep drawing process.

Keywords:Hydromechanical deep drawing, conventional deep drawing, finite element analysis.

Analysis of convective heat transfer rate in internal combustion engine using Hohenberg's correlation

B. Menacer1, M. Bouchetara2 1,2 Department of Mechanical Engineering, University of Sciences and the Technology of Oran, BP 1505 El -MNAOUER, USTO 31000 ORAN, Algeria

Email1: [email protected] Email2:[email protected]

Abstract:The in-cylinder convective heat transfer from the combustion gas to the cylinder wall of the combus- tion chamber has a strong effect on the diesel engine performances. This study contribute to the know- ing in this area for the event of the convective heat transfer from fluid to the cylinder wall of a turbo- charged diesel engine with six-cylinder direct injection operating under steady-state conditions. An optimized choice of correlation was applied for the evaluation of heat transfer coefficient, which is the Hohenberg's correlation. We developed a computer program for simulating the operation of a six- cylinder direct injection turbocharged diesel engine, and using a commercial GT-Power software to validate the simulation results. The influence of certain engine parameters (thermodynamic and geo- metric) on the convective heat flux and its maximum value are studied in the present paper. The re- sults show that the convective heat transfer characteristics as a function of crank angle of the six cyl- inder turbocharged diesel engine strongly depend on the engine injection timing, the cylinder wall temperature and load for the both softwares; FORTRAN and GT-Power.

Keywords:0-Dimensional model, Thermodynamic and Geometric parameters, Convective heat transfer, Hohen- berg's correlation, Computational simulation, Diesel engine, GT-Power software.

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

Numerical prediction of sheet cavitation around a hydrofoil

Saadia Adjali 1, Mustapha Belkadi 1

1 Laboratory of Aero-Hydrodynamics Naval, P.O. 1505 El-Mnaouar Oran, Algeria

Abstract: Cavitation is a complex vapor-liquid two phase flow including phase change, compressibility and vis- cous effects. It is a common phenomenon in marine propulsion systems and imposes limits to the at- tainable propulsor thrust and efficiency by cavitation induced vibrations and cavitation erosion.The paper presents a study of the steady cavitating flows around 2D and 3D hydrofoils using a k- model, in the frame work of multi-phase mixture flow RANS approach. The cavitation is modeled by Schnerr-Sauer’s cavitation model at differents cavitation numbers =1,1.2 and 1.6, Finally, the expe- rience with FLUENT is used to discuss the general ability of multiphase RANS codes to predict the cavitation steady flow around NACA 0015.In our study results of pressure coefficients and volume fraction are presented for the 2D and 3D cas.

Keywords: Cavitation t, Hydrofoils, RANS codes, volume fraction. Solar Hydrogen Production by Mg-Cl Thermocemical Cycle in the Algerian Desert

Malika Ouagued University of Chlef, LPTPM, Esalem City, 02000, Chlef, Algeria.

Abstract: The paper analyzes an integrated Mg-Cl thermochemical cycle with solar parabolic trough system. Direct solar radiations have been estimated for different locations from Algerian desert with tilted and tracking collectors. The results reveal that, tilted tracking axis aperture toward the south at local lati- tude angle is most efficient than does fixed tilted aperture facing south per local latitude angle with an average difference of 0,6 MWh/m2/year. Hydrogen production rate from the process have been evalu- ated and compared under Algerian desert conditions. The maximum hydrogen production rate is ob- tained for Tamanrasset with 136,97 and 143,011 Ton H2/year by fixed and tracking system, respec- tively.

Keywords: Mg-Cl cycle, hydrogen production, solar parabolic trough collector, Algerian desert. Impact of the leachates of the old uncontrolled dump on the immediate environment: Case of the old rubbish dump of Tiaret commune (Ain Guesma road)

B. Khatemi 1,, Y Laidani 2,a, G. Henini 2,b, A. Fikaouni 2,a, K. Djellouli della 3,b 1,University of Ibn Khaldoun, Tiaret, 14000, Tiaret, Algeria. 2, a University of Chlef, LVCWE, P.O. Box.151, Esalem City, 02000, Chlef, Algeria. 2, b University of Chlef, LEW, P.O. Box.151, Esalem City, 02000, Chlef, Algeria. 3University center of Tindouf, 37000, Tindouf, Algeria.

Abstract: The importance of the The random disposal of municipal waste has long been the most economical and most used means of waste by the emanation of foul odors mainly due to the permanent production of biogas and leachates. Leachate, with a high pollutant load, seeps into the subsoil, causing de facto severe degradation of the environ- ment located near the landfill. This work, which is the subject of our research, is part of the study of the direct impact of leachates on ground- water tables and on the population located near the wild dump of the commune of Tiaret. The various analyzes carried out on leachate from the landfill were carried out in specialized laboratories in Al- geria. These leachates are in the form of a percolate, with a high mineral, organic and metallic pollutant load (chlo- rides, sulphates, chromium, cadmium, iron and copper and others). Ecotoxicological approach.

Keywords: landfill, pollution, leachates, environment.

Pomegranate Skin and Date Pedicels as a new biosorbents to remove of textile dye (Yellow bemacid) from aqueous solutions: Equilibrium, kinetics, modeling and thermodynamics

G. HENINI , Y. LAIDANI , A. FEKAOUNI, K. DJELLOULI DELLA , M. AMARA

University of Chlef, LVCWE, P.O. Box.151, Esalem City, 02000, Chlef, Algeria

Characterization and study of chemical deposits of Nickel-phosphorus on ordinary steel A33 KARIMA CHOUCHANE, ATHMANI DJAMILA,RAZIKA MEHDAOUI, A KHADRAOUI, NADIR MESRATI

Djilali Bounaama University,SNV-ST Faculty , Khemis-Miliana-ALGERIA

Adsorption of proteins at solid surfaces

A. Bouhekka

University of Chlef, Department of Physics, 02000, Chlef, Algeria.

Abstract: The adsorption of proteins at solid surfaces is very important in different fields and therefore it attracts a lot of researchers in many areas. Understanding this kind of adsorption is still a challenge for scien- tists because of the factors that control this phenomenon like surface nature, bio-molecules and the surface charge plus pH. In experimental work, infrared spectroscopy (FTIR-ATR) is one of the most useful techniques used to investigate the adsorption of molecules at surfaces and represents a sensitive method for In Situ investigations. In this topic we are interested to understand theoretically the adsorp- tion process of proteins at different solid surfaces such as TiO2 porous thin films which have a lot of applications in environment.

Keywords: Surface, Proteins, Adsorption, denaturation, Spectroscopy.

Binary mixture of dipolar gases

AHMED HOCINE, MOHAMED BENAROUS, MADANI MOHAMED LTPMP, Faculty of Exact Sciences and Informatics, Hassiba Benbouali University of Chlef, Algeria.

Coupling adsorption onto Hranfa's marl and microfiltration with ceramic membranes for elimi- nation of industrial dye (Red bemacid “ETL”).

Bekhta.Maimoun1, Abderrahmane.Djafer1, Lahcène.Djafer1, André.Ayral2

1 University of Chlef , Water and Environment Laboratory, Chlef, Algeria,

2 University of Montpellier, European Institute on Membranes, Montpellier, France.

Abstract: Excessive consumption of water by many industries has generated significant quantities of liquid waste, containing complex mixtures of dyes, extremely heterogeneous and variable. These ef- fluents pose a real danger to human health and its environment because of their stability and their re- calcitrant power, making them toxic and carcinogenic [1, 2].

The most recent research is focused on low-cost treatment processes, using new materials of natural and biologi- cal origin. These natural adsorbents have shown a great efficiency for the elimination of industrial effluents, es- pecially for heavy metals and dyes [3]. The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria.

The present work aims is the study of a process coupling membrane adsorption and microfiltration for the elim- ination of the industrial dye (Red bemacid ETL). This process combines an adsorption step on an adsorbent (Hranfa’s marl) to a membrane technique (microfiltra- tion), each step will be studied separately and the coupling of the two techniques will be evaluated.

Keywords: Adsorption, red bemacid, Hranfa’s marl, microfiltration.

Effect of Environmental Conditions on the Resistance of Damaged Composite Materials

M.A. Khiat1*, R. Zenasni1, M. Hamedi1 1University of Mostaganem, LMPC, BP 227,27000, Mostaganem, Algeria.

Abstract: The present paper proposes a strength model for unidirectional composites with Lin/Epoxy. The mod- el assumes that, a central core of broken fibers flanked by unbroken fibers which are subject to stress concentra- tions from the broken fibers. The approach of the model consists of using a modified shear lag model to calculate the ineffective lengths and stress concentrations around fiber breaks. In this paper, we attempt to incorporate in the proposed model the unidirectional composite property variation with temperature and moisture in order to predict even composite strength degradation. Strength degradation is often seen as a result of changes in ineffec- tive lengths at fiber breaks. Subsequently, damage to the material can be estimated at the micromechanical scale under the effect of temperature and humidity.

Keywords: Unidirectional composite, broken fibers, Micromechanics, Composite Lin/Epoxy.

Three-dimensional numerical analysis of a bonded joint based on epoxy/SiO2nanocomposite ad- hesive

HadjBoulenouar Rachid1, N. Djebbar2, K. Bouzouina1and B.Boutabout1 1University of SidiBel Abbes, LMPM, BP 89, BenM’hidi City, SidiBel Abbes, 22000, Algeria. 2University of HassibaBenbouali, Esalem City, 02000, Chlef, Algeria

Abstract:The main objective of this work is to analyze three-dimensionally the mechanical behavior of bonded assemblies. The structure studied is composed of two adherents (aluminum alloy 2024-T3) joined by an adhesive (Adekit-A-140). We can simulate tests and obtain numerical results using the ABAQUS® calculation code in order to have numerical models using the finite element method. Numerical methods take into account bending effects, shear in the adhesive, edge effects in the joint and is not limited to simple configurations of assemblies solicited by unidirectional forces such as analytical methods. It will be possible to study the distribution of the stresses in the case of joints of any forms or in the case of complex or multidirectional loadings.

Keywords:nanocomposite, epoxy, nanoparticles, SiO2.

Stress distribution analysis in a composite / composite type single-joint joint effect of fiber orien- tation S.CH. Djebbar1, K. Madani1, M.A.Bellali1, N.Kadourri1 1Laboratoire Mécanique Physique des Matériaux (LMPM), Université de Sidi Bel Abbes, Sidi Bel Abbes, Algérie

Abstract: The finite element modeling of the behavior of a bonded assembly. An analysis of constraint in the seal adhesive is presented as a function of several parameters to know the effect of the nature and orientation of the fibers and depending on the mode of consideration of simulation of the composite. The results of the numerical analysis by finite elements using the code for the calculation Abaqus have shown, the effective- ness of this method in the determination of the constraints in the seal adhesive. The value of the respectful constraints in the adhesive gasket strongly depends in the first place of the displacement value imposed and the nature of the substrates. The behavior of the adhesive depends on the mechanical properties of the composite (the nature of the fiber). Whatever the nature of the fiber, there are always strong constraints at the level of the edges of the adhesive and low values at the level of the middle of the ad- hesive. The heart of the adhesive becomes more and more active if the mechanical properties of the composite are very high. For most of the cases, the composite pre- sents high mechanical characteristics compared to those of the adhesive; therefore a small movement imposed entails the adhesive in its field plastic. The sequence of stacking also has a decisive role on the value of the constraints, if the sequence of stacking present guidelines of the fibers following the direction of loading, the compo- site becomes resistant and therefore, the majority of the applied load will be transmit- ted to the adhesive, therefore high values of constraints. By contrast, if the orientation of the fibers tends toward 90°, the composite will have the mechanical properties more low according to the direction of loading and therefore a small quantity of the load will be forwarded to the adhesive, therefore to low values of constraints.

Keywords: Constraints, forced displacement, sequence of stacking, nature of fiber, simulation mode, and finite element analysis.

Defects of forming processes and induced properties on the compositelaminate

B. Kacimi2,,F. Teklal2, A. Djebbar3 1, 2, 3University of Mouloud MAMMERI on Tizi Ouzou, BP 17 RP 15000, TiziOuzou, Algeria. Mechanics, Structures and Energetics Laboratory (L.M.S.E)

Abstract:This paper deals with the influence of mesoscopic out-of-plane defect (buckles) and reinforcement shear, on the compression after impact(CAI)behavior of a composite laminate. This glass/polyester composite consists of one layer of taffeta fabric and three layers of mat. The defects were generated on taffeta fabric to reproduce the state and amplitudes observed in a feasibility study of a complex part. Three cases were investigated: Healthy samples and two kinds of samples with buckles defects generated in the longitudinal direction of the taffeta and deformations shear of reinforcement. The tests and observations made on the plates with calibrated defects have identified a negative effect on the elastic parameters and have revealed greater damage relative to the healthy material. The predom- inant contribution of transverse yarns in laminates with calibrated defects, did not allow a possible degradation of the compression after impact fracture stress of these materials compared to impacted Healthy material.

Keywords:laminate, damage, manufacturing processes, textiles, buckles defect.

Numerical analysis of the effect of the dimensions of the composite patch on the fracture behav- ior of a damaged and repaired plate; optimization by experience plan

A. Bellali, N. Kaddouri; M. Mokhtari, K. Madani LMPM, laboratoire de mécanique physique des matériaux, faculté de technologie, université djillali liabes, 22000 Algeria

Abstract: Structures damaged and repaired by composite patch are generally subjected in service to mechanical and / or thermal stresses giving rise to generally variable stress conditions thus causing the creation of other cracks in the composite or the adhesive and a rapid spread of the crack in the damaged plate. research work in this area is aimed at improving the performance of the patch in order to

The Fourth International Conference on Fracture Mechanics and Energy " Trends on Fracture and Environment" Chlef 26-29 November 2018. Algeria. transfer a maximum of damaged plate loads through the adhesive without causing any high stress in the compo- site and the adhesive. Optimization of patch dimensions improves the performance of the repair and helps re- duce considerably the volume occupied by the patch and consequently to relieve the structure by decreasing the weight. our work fits into this context, the goal is to try to bring an optimal shape to the patch to reduce the inte- gral J in the plate. the analysis of the results was carried out by the finite element method using the calculation codeAbaqus. Keywords: Intégrale J, patch, plan d'expérience.

Elaboration and characterization of the mechanical behavior of an epoxy glass composite mate- rial

A. Ghouaoula1, A.veffa.1

1University of Chlef, LPTPM, Esalem City, 02000, Chlef, Algeria.

Abstract: The use of Fiber to reinforced polymeric composites materials has become a current practice in gas transport and storage cylindrical structures due to their lightweight, relative low cost and mainly their high strength over metallic materials. Testing of cylindrical specimens made of uni- or multi-direc-tional lay-ups produced either by filament winding or layer wrap-ping has been used since long for composites characterization. Early works by Pagano and Whitney[1]and Whitney[2]were de-voted in defining the appropriate tube dimensions along with investigations on the developed stress fields under multi-axial loading. The literature shows that two theoretical approaches are used to predict the composite structures be- havior; the classical theory laminates and the so-called theory of elasticity. The first theory assumes that the composite laminates are in a state of planes stress and provides no stress in the direction of thickness. The second shows that the stress developed through radial thickness have a large influence on the choice of stacking sequences [1].

Keywords:Tubular structure, Viscoelastic, Damage, Pressure loading, composite reinforcement.

Mechanical and chemical behaviour of a composite material produced by uniaxial compression of a mixture of aluminium and alumina powders

S. Dehrib1, N. Zazi2, J.P. Chropart3 1University of Tizi- Ouzou, Mouloud Mammeri BP17RP, Tizi- Ouzou, Algéria, 2University of Tizi- Ouzou,(LMSE) Mouloud Mammeri BP17RP, Tizi- Ouzou, Algéria, 3 University of Reims Champagne Ardenne, LISM EA 4695 UFR SEN, BP1039, Moulin de la Housse, 51687 Reims, Cedex, France

Abstract: Currently, aluminium metal matrix composite materials have great potential for aerospace, aeronautics and automotive applications, particularly through the weight savings they bring, which allows energy savings.The addition of ceramic reinforcements to aluminium alloys is accompanied by a significant increase in performance in terms of stiffness, wear and fatigue resistance, and electrical and thermal conductivity. In this work, it is about the elaboration of a composite, consisting of an aluminium pow- der matrix and an alumina powder reinforcement, by mechanical compression. The mixing of the powders has been carried out. The alumina powder content in this material was varied between 0% and 10%. Two compression densities were used: 8.347KN/cm3 and 43.051KN/cm3. Prior to devel- opment, a characterization by optical and scanning electron microscopy and a static study were carried out on aluminium and alumina beams, a hardness characterization under reduced loads, a corrosion morphology characterization at ambient temperature and at 30°C to be carried out. This work, which is essentially experimental, aims to highlight the effect of alumina addition on the hardness, microstructure and chemical properties of the composite used in the compression process, as well as the advantages and disadvantages of the processing technique used. The results ob- tained show the permanent presence of porosity between the aluminium grains, the distribution of the alumina powder particles is always heterogeneous. Vickers microhardness is variable from one area to another for all samples. The increase in compression density leads to a considerable increase in hard- ness. Generalized corrosion is observed on the surface of the aluminum powder grains and localized corrosion is observed at the interface between the aluminum powder grains. Sensitivity to generalized corrosion increases with increasing alumina content in the composite.

Keywords: Al/Al2O3 Composites, Corrosion, Axial compression, Heterogeneity, Vickers microhardness.

Macroscale modelisation of Chip formation in FRP composite machining

Dj. Djilalisalah1*, M. Mendas2, , M. Hadj Miloud2 1 LME Laboratory, University H-B of Chlef, Hay Essalem Chlef, Algeria. 2 LRM Laboratory, University H-B of Chlef, Hay Essalem Chlef, Algeria

Abstract: In this work a plane stress finite element model is used to study the effect of fiber orientation on ma- chining response of unidirection FRP. The Hashin theory is used to simulate the onset degradation at a material point of FRP composite. The damage evolution model is based on energy dissipation during the damage process. It uses four damage variables to describe damage of each failure mode and to character- ize the progressive degradation of material stiffness leading to material failure. This study was realised for a fixed machining fiber parameters and tool geometry. The developed model has been providing a bet- ter understanding of chip formation mechanisms of FRP composite and the extending of the failure zone. It shows a good agreement with experimental observation and a high dependence between damage mech- anism and fiber orientation was observed.

Keywords: macro-scale, Chip formation, FRP composite, finite element, damage.

Numerical model for repair patch optimization of 2024-T3 aluminum structures cracked in mixed mode under tensile loading

N.Deghoul1, L. Errouane1,Z.Sereir1 1Laboratoire Structures de Composites et Matériaux innovants, Faculté de Génie Mécanique, Université des Sciences et de la Technologie d’Oran, BP 1505 El M’naouer, USTO, Oran, Algérie,

Abstract:In the present work, a numerical model is developed for repair patch optimization of a 2024-T3 alumi- num plate containing an inclined central crack is developed.The patch is bonded over a cracked alu- minum sheet using a small adhesive layer.The numerical model predicts the effect of patch on the be- havior of the cracked plate under tensile loading on the integrity of the structure. To achieve this ob- jective, a finite element model is performed to determine the evolution of the stress intensity factor (KI, KII) as a function of the angle of inclination of the crack. After validation of the numerical mod- el, the optimization of the patch volume is formulated and solved by two zero order and first order methods. Considering design variables such as height, width, a significant reduction in patch volume can be achieved by applying the developed model.

Keywords:stress intensity factor, crack, patch repair,optimization.