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Heat Sink Design for Optimal Performance
© 2019 JETIR January 2019, Volume 6, Issue 1 www.jetir.org (ISSN-2349-5162) Heat Sink Design for Optimal Performance Arjun Kumar, Department of Mechanical Engineering, Galgotias University, Yamuna Expressway Greater Noida, Uttar Pradesh Email ID: [email protected] ABSTRACT- The regularly rising transistor densities and exchanging speeds in chip have been went with an emotional increment in the system heat motion and force dissemination. Right now rising IC densities joined with significantly increasingly stringent execution and unwavering quality necessity have made warm administration issues perpetually unmistakable in the plan of modern microelectronic systems. So as to accomplish a high degree power dissemination expelled heat sinks, various research works have been done in most recent two decades. It is seen that segments of present day versatile electronic gadgets with expanding heat loads with decline in the space accessible for heat dispersal. The expanding heat heap of the gadget should be expelled for keeping up the proficient exhibition of the gadget. The exponential increment in warm burden in air cooling gadgets requires the warm administration system to be advanced to achieve the best in the given space. In the current paper a survey report on far reaching portrayal for warm conditions for cooling reason inside the Heat sink for electronic gadgets has been condensed. Keywords: CFD, Cooling System, Heat Sink, Heat Transfer, Heat Pipe. INTRODUCTION In the here and now of logical time, the fast advancement of electronic innovation, gadgets and apparatuses assumes a significant position in our everyday lives. Be that as it may, as the part size therapists there is an emotional addition in the Heat transition per unit region, because of which the working temperature of the electronic segments may surpass the ideal temperature level. -
Investigating the Effect of Basalt Fiber Additive on the Performance of Clay Barriers for Radioactive Waste Disposals
Investigating the effect of basalt fiber additive on the performance of clay barriers for radioactive waste disposals Hajar Share Isfahani & Amin Azhari Bulletin of Engineering Geology and the Environment The official journal of the IAEG ISSN 1435-9529 Bull Eng Geol Environ DOI 10.1007/s10064-020-02044-x 1 23 Your article is protected by copyright and all rights are held exclusively by Springer- Verlag GmbH Germany, part of Springer Nature. This e-offprint is for personal use only and shall not be self-archived in electronic repositories. If you wish to self-archive your article, please use the accepted manuscript version for posting on your own website. You may further deposit the accepted manuscript version in any repository, provided it is only made publicly available 12 months after official publication or later and provided acknowledgement is given to the original source of publication and a link is inserted to the published article on Springer's website. The link must be accompanied by the following text: "The final publication is available at link.springer.com”. 1 23 Author's personal copy Bulletin of Engineering Geology and the Environment https://doi.org/10.1007/s10064-020-02044-x ORIGINAL PAPER Investigating the effect of basalt fiber additive on the performance of clay barriers for radioactive waste disposals Hajar Share Isfahani1 & Amin Azhari2 Received: 28 December 2019 /Accepted: 6 November 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020 Abstract Radioactive materials are widely used in mining, manufacturing, medicine, and agricultural processes. The waste products from these materials are hazardous and should be appropriately dumped. -
All About Fibers
RawRaw MaterialsMaterials ¾ More than half the mix is silica sand, the basic building block of any glass. ¾ Other ingredients are borates and trace amounts of specialty chemicals. Return © 2003, P. Joyce BatchBatch HouseHouse && FurnaceFurnace ¾ The materials are blended together in a bulk quantity, called the "batch." ¾ The blended mix is then fed into the furnace or "tank." ¾ The temperature is so high that the sand and other ingredients dissolve into molten glass. Return © 2003, P. Joyce BushingsBushings ¾The molten glass flows to numerous high heat-resistant platinum trays which have thousands of small, precisely drilled tubular openings, called "bushings." Return © 2003, P. Joyce FilamentsFilaments ¾This thin stream of molten glass is pulled and attenuated (drawn down) to a precise diameter, then quenched or cooled by air and water to fix this diameter and create a filament. Return © 2003, P. Joyce SizingSizing ¾The hair-like filaments are coated with an aqueous chemical mixture called a "sizing," which serves two main purposes: 1) protecting the filaments from each other during processing and handling, and 2) ensuring good adhesion of the glass fiber to the resin. Return © 2003, P. Joyce WindersWinders ¾ In most cases, the strand is wound onto high-speed winders which collect the continuous fiber glass into balls or "doffs.“ Single end roving ¾ Most of these packages are shipped directly to customers for such processes as pultrusion and filament winding. ¾ Doffs are heated in an oven to dry the chemical sizing. Return © 2003, P. Joyce IntermediateIntermediate PackagePackage ¾ In one type of winding operation, strands are collected into an "intermediate" package that is further processed in one of several ways. -
BORON FIBER NEUTRON SHIELDING PROPERTIES Joseph W. Hanafin, William Grant, Specialty Materials, Inc. Lowell, MA1 Leo Bobek, Th
BORON FIBER NEUTRON SHIELDING PROPERTIES Joseph W. Hanafin, William Grant, Specialty Materials, Inc. Lowell, MA1 Leo Bobek, Thomas Regan, UMass Lowell, Radiation Laboratory, Lowell, MA2 January 10, 2011 Introduction Boron fiber is a large diameter monofilament (102 micrometers, 4.0 mils) made via chemical vapor deposition by Specialty Materials, Inc (SMI), Lowell, MA. Since its development in the early 1960s, it has been used in a wide range of applications from aerospace to sporting goods because of its excellent mechanical properties, most notably its extremely high compression strength. However, another important characteristic of elemental boron and boron fiber is its ability to capture neutrons, which makes it effective for radiation shielding in the nuclear power industry and neutron capture therapy in the medical industry. SMI collaborated with the U Mass Lowell (UML) Radiation Laboratory to conduct a comparative study of the neutron shielding effectiveness of a number of boron composite configurations. To better understand why boron fiber can be an effective tool for neutron shielding, it is worthwhile to step back and look at the fundamental properties of elemental boron. Boron exists in nature primarily as borate oxides and salts such as borax. The most common uses of boron are as a silicon dopant in the semiconductor industry, in sodium perborate bleaches, and as an oxide in glasses and ceramics to improve their resistance to thermal shock. Boron can also be formed into materials such as cubic boron nitride, an extremely hard abrasive that can scratch diamonds, and boron carbide (B4C), also used as an industrial abrasive (Mohs Hardness of 9.5) and in ballistic ceramics. -
Brac University Graphene Based Nano Scale Heat
BRAC UNIVERSITY SCHOOL OF ENGINEERING AND COMPUTER SCIENCE DEPARTMENT OF ELECTRICAL AND ELECTRONIC ENGINEERING GRAPHENE BASED NANO SCALE HEAT SPREADER IN FIELD EFFECT TRANSISTOR BY SHAFANA ASHRAFI(11221016) SHEKH RAFID AHNAF (12221109) TASFIA PROMY (12121162) IN PARTIAL FULFILMENT OF THE REQUIREMENT FOR THE DEGREE OF BACHELOR OF SCIENCE IN ELECTRICAL AND ELECTRONIC ENGINEERING April, 2017 Dhaka, Bangladesh 1 In the name of Allah, the most gracious, most merciful. 2 Department of Electrical and Electronics Engineering, BRAC University Declaration We, hereby declare that this thesis is a work of research and self-study. All the information in this academic paper has been inferred from published work of others. Data, equations, images and all sources are properly cited. This work has not been partially or fully presented anywhere else. Signature of the Supervisor: Signature of the authors: ___________________________ _________________________________ Avijit DasShafana Ashrafi Lecturer BRAC University _________________________________ ShekhRafidAhnaf _________________________________ TasfiaPomy 3 Acknowledgement We would firstly like to thank our Thesis Supervisor Avijit Das for his immense support and guidance. Without his patience and motivation, we could have never completed our research. He is as great a supervisor as he is a teacher. We pray for his success. A big, warm gratitude to all the teachers of our EEE department. We will always remember the teachings they have bestowed upon us. We cannot forget the immense support we got from the Computer Laboratory Technical Officers. From installing our software to helping us troubleshoot the computer errors, we have always found them by our side. A big thank you to all the staff of UB40402. -
Investigation of Mechanical Properties of Aluminium Silicon Carbide Hybride Metal Matrix Composite (Mmcs)
International Journal of Research in Engineering and Science (IJRES) ISSN (Online): 2320-9364, ISSN (Print): 2320-9356 www.ijres.org Volume 5 Issue 4 ǁ Apr. 2017 ǁ PP.88-105 Investigation of Mechanical Properties of Aluminium Silicon Carbide Hybride Metal Matrix Composite (Mmcs) Bhagwat T. Dhekwar, Aliva Mohanty, Jagdish Pradhan, Saswati Nayak Department of Mechanical Engineering, NM Institute of Engineering and Technology,Bhubaneswar , Odisha Department of Mechanical Engineering, Raajdhani Engineering College,Bhubaneswar,Odisha Department of Mechanical Engineering,Aryan Institute of Engineering and Technology Bhubnaeswar , Odisha Department of Mechanical Engineering,Capital Engineering College,Bhubaneswar,Odisha ABSTRACT: Metal Matrix Composites (MMCs) have shown great interest in recent times dueto its poetental of applications in aerospace and automotive industries because of having superior strength to weight ratio. The wide use of particular metal matrix composites for engineering application has been obstructed by the exact use of silicon carbide ( SiC) by % , hence high cost of components. Although there are several techniques used for casting technology rather it can be used to overcome this problem. Materials are frequently chosen for structural applications because they have desirable combinations of mechanical characteristics. Development of hybrid metal matrix composities has became important area of research interest in Material Science . In view of this , the present study focuses on the behaviour of aluminium silicon carbide ( AlSiC) hybrid metal matrix composities .The present study was aimed at evaluating the mechanical properties of Aluminium in the presence of silicon carbidewith different weight percentage ofsilicon carbide (5%,10%,15%& 20%)combinations.ConsequentlyAluminium metal matrix composite combines and exhibits huge strength of the reinforcement with the toughness of the matrix to achieve a combination of desirable properties not avilable in any single conventional metarial . -
A Material Difference a MATERIAL DIFFERENCE
2017 BRAND BOOK A Material Difference A MATERIAL DIFFERENCE Mitsubishi Rayon makes some of best golf shafts because we make them from scratch. We not only manufacture the golf shaft, but all of the critical raw materials that make up the golf shaft including the monomer, acrylic fiber, carbon fiber, resin, and prepreg. Over the last 30 years, we have developed more than a thousand different formulations of resin and made over a hundred types of fiber for many performance-based applications, including golf shafts. This vertical integration means we can make virtually any combination of resins and fibers required to optimize a golf shaft’s design and performance. The majority of our competitors, on the other hand, work with a relatively limited list of raw materials from a finite number of available suppliers. Typically they purchase stock prepreg, which can require designs to be adjusted to the limitations of the available materials. Our ability to make any composition of resin or fiber and combine them into our own prepreg sets us apart from our competition. VERTICAL INTEGRATION MONOMERS Basic raw materials consisting of simple molecular structures (monomers) are combined to produce Acrylonitrile (AN). AN is then polymerized to form polyacrylonitrile (PAN). Mitsubishi Rayon uses the highest-grade materials available to create AN and PAN. PRECURSOR A solution of PAN is then spun into precursor. The process of creating precursor heavily influences the quality and consistency of the carbon fiber. It is a process in which Mitsubishi Rayon has refined and perfected over the past 80-years. CARBON FIBER Precursor is oxidized and carbonized in ovens to produce carbon fiber. -
Digital Transformation of Composites
GET THE LATEST COVID-19 MANUFACTURING STORIES AT CompositesWorld.com/covid-19 Composites 4.0: DIGITAL TRANSFORMATION OF COMPOSITES JULY 2020 Automated aerospace RTM line for next-gen spoilers / 16 Narrow UD tapes bridge the ATL-AFP gap / 26 Composites masterwork: 2020 Corvette, Part 1 / 44 A property of Gardner Business Media VOL 6 No. 7 BETTER WITH BRAID BETTER PARTS. LOWER COSTS. Quasi-Isotropic Fabric – Balanced in a Single Ply QISO® has the same properties in every direction enabling simple and efficient processing, reduction in waste, and superior performance. Off The Roll +/-45° Fabric Bimax® is a biaxial +/-45° fabric offering significant material savings and reduced manufacture time. Highly Efficient Unidirectional Fabric ZERO® is an affordable, highly efficient unidirectional fabric offered in a variety of areal weights. weights www.braider.com 513·688·3200 [email protected] 4595 East Tech Dr. Cincinnati, Ohio 45245 TABLE OF CONTENTS JULY 2020 / Vol: 6 No–: 7 COLUMNS FEATURES 4 From the Editor 16 Inside Manufacturing: 6 Past, Present & Future High-rated, automated Tom Foltz, director of business develop- aerospace RTM line delivers ment at Speciality Materials, refl ects on the next-gen spoilers history of high-performance boron fi ber At Spirit Aerosystem's Prestwick facility, CW and its future developments. editor-in-chief, Je Sloan, provides a glimpse at 16 the future of aerocomposites manufacturing in a 8 Perspectives & Provocations resin transfer molding line for A320 spoilers. Columnist Dale Brosius refl ects on recent By Je Sloan composites industry trends and how they are impacted by the coronavirus pandemic. 26 Work in Progress: 10 Design & Testing Narrow UD tapes bridge Columnist Dan Adams explains how sandwich composites fl exure tests are the ATL-AFP gap used to assess facesheet or core failures Automated tape laying and automated fi ber for three-point and four-points fl exural placement are similar, but not the same. -
Fabrication & Analysis of Jute, Hemp & Banana Fiber Hybrid Composites
ISSN 2319-8885 Vol.04,Issue.57, December-2015, Pages:12315-12324 www.ijsetr.com Fabrication & Analysis of Jute, Hemp & Banana Fiber Hybrid Composites 1 2 K. RUTHU RANI , SK. BAZANI 1PG Scholar, Eswar College of Engineering, Narasaraopet, Guntur, AP, India. 2Assistant Professor, Eswar College of Engineering, Narasaraopet, Guntur, AP, India. Abstract: An attempt has been made in the present work to explore and the possible use of variety of cultivated/wild grown fiber in the development of jute, hemp and banana fiber reinforced polyester hybrid composites. The fiber is extracted from manual method and retting, and the test specimens are prepared as per ―ASTM‖ standards. Four different contents are incorporated in the specimen, with each fiber content two identical specimens are prepared. Jute, hemp and banana fiber reinforced polyester hybrid composites are prepared by incorporating up to (0.5grms, 1grms, 1.5grms, 2grms) by mass. It is observed clearly (2grms) only mass of fiber compare with (1.5grms) of hybrid composites. Increase in the weight percentage of fibers changes the tensile strength, bending strength, impact strength. Keywords: ASTM, Fiber, Anatomical Structure, Leaves, Roots, Fruits, Seeds. I. INTRODUCTION A. Classification of Composites: The word ―composite‖ means two or more distinct parts The commonly accepted classification of composites is: physically bounded together‖. Thus, a material having phases 1. fibrous composites, or two more distinct constituent materials may be considered 2. laminated composites, a composite material. Fiber-reinforced composite materials 3. Particulate composites. consist of fiber with high strength and modulus embedded in or bonded to a matrix with distinct interfaces (boundary) 1. -
Chapter 16 Composites
1496T_c16_577-620 12/31/05 14:08 Page 577 2nd REVISE PAGES Chapter 16 Composites Top. ABS plastic having Bidirectional layers. 45 a low glass transition temperature. fiberglass. Provide torsional Used for containment and cosmetic stiffness. purposes. Unidirectional layers. 0 (and Side. ABS plastic some 90 ) fiberglass. Provide having a low glass longitudinal stiffness. transition temperature. Containment and cosmetic. Core wrap. Bidirectional layer of fiberglass. Acts as a torsion box and bonds outer layers to core. Core. Polyurethane plastic. Acts as a filler. Bidirectional layer. 45 fiberglass. Damping layer. Polyurethane. Provides torsional Improves chatter resistance. stiffness. Unidirectional layers. 0 (and some 90 ) fiberglass. Provide longitudinal stiffness. Edge. Hardened steel. Facilitates Bidirectional layer. 45 fiberglass. turning by “cutting” Provides torsional stiffness. into the snow. Base. Compressed carbon (carbon particles embedded in a plastic matrix). Hard and abrasion resistant. Provides appropriate surface. One relatively complex composite structure is the modern ski. In this illustration, a cross section of a high-performance snow ski, are shown the various components. The function of each component is noted, as well as the material that is used in its construction. (Courtesy of Evolution Ski Company, Salt Lake City, Utah.) WHY STUDY Composites? With a knowledge of the various types of composites, property combinations that are better than those as well as an understanding of the dependence of found in the metal alloys, ceramics, and polymeric their behaviors on the characteristics, relative amounts, materials. For example, in Design Example 16.1, we geometry/distribution, and properties of the con- discuss how a tubular shaft is designed that meets stituent phases, it is possible to design materials with specified stiffness requirements. -
Mechanical Behavior of Carbon and Glass Fiber Reinforced Composite Materials Under Varying Loading Rates
Mechanical Behavior of Carbon and Glass Fiber Reinforced Composite Materials Under Varying Loading Rates by Venkata Naga Prakash Mallik Pariti A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Engineering (Mechanical Engineering) in the University of Michigan–Dearborn 2017 Master’s Thesis Committee: Associate Professor German Reyes-Villanueva, Chair Professor HongTae Kang Assistant Professor Tanjore V Jayaraman To My Parents, Mr. Soma Sekhar Pariti and Mrs. Ramalakshmi Pariti And To My Siblings, Bhaskar Pariti and Nara Pariti For their endless love, support and encouragement ii ACKNOWLEDGEMENTS I would like to express my sincere thanks and deepest gratitude to my advisor Dr. German Reyes- Villanueva for his vast knowledge, expertise, understanding and patience. Without his technical, financial and moral support this work could never be possible. I will forever be indebted to him for giving me a rewarding graduate school experience. I would like to thank Dr. HongTae Kang for taking time to evaluate my thesis and helping me choose my career interests as a research student when I first joined the University of Michigan- Dearborn. I also would like to thank Dr. Tanjore V Jayaraman for taking time to evaluate my thesis. I would like to thank Roush Industries for providing the test panels that are used in this study. I would like to express my profound gratitude to my parents and siblings for their unfailing support and encouragement throughout my thesis. I also would like to thank the office staff of the mechanical engineering department whose assistance helped me along the way. -
Science and Technology Review, March 1996
SP ^ * i£ ^m The safe, long-term disposal of nuclear waste has been a concern of Laboratory scientists for many years. The artist's rendering on this month's cover shows one concept of a nuclear waste repository deep within the earth, complete with a remotely controlled storage and retrieval system, multiple storage chambers, and waste packaging systems to protect the environment from radioactive contamination. The article beginning on p. 6 reports on Laboratory work on the engineered barrier system at the heart of the planned repository. Dating from 1977, this work has focused on testing and selecting materials for the manmade waste package as well as on modeling the long-term interactions of the waste and the waste package with the near-field geological environment to assure the safety of human life and the environment for 10,000 years. We want to know what you think of our publication. Please use the enclosed survey form to give us your feedback. Electronic Access S&TR is available on the Internet at http://www.llnl.gov/str/str.html. As references become available on the Internet, they will be interactively linked to the footnote references at the end of each article. If you desire more detailed information about an article, click on any reference that is in color at the end of the article, and you will connect automatically with the reference. About the Review The Lawrence Livermore National Laboratory, operated by the University of California for the United States Department of Energy, was established in 1952 to do research on nuclear weapons and magnetic fusion energy.