Modelling and Analysis of Honeycumb Airless Tire
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
1. What Is Uptis and What Advantages Does It Offer?
Frequently Asked Questions 1. What is Uptis and what advantages does it offer? Uptis (acronym standing for “Unique Puncture-proof Tire System”) is an assembled airless wheel structure. Uptis has been made possible through Michelin’s mastery and expertise with tire mechanics and high-tech materials. It also represents an evolution of Michelin’s expertise in TWEEL technology. Uptis can be thought of as the first in a new generation of airless solutions. This technology for passenger vehicles offers a number of advantages: ▪ Car drivers feel safer and more secure on the road due to the reduced risk of flat tires and other air loss failures that result from punctures or road hazards. ▪ Fleet owners and professional vehicle drivers optimize their business productivity (no downtime from flats, near-zero levels of maintenance). ▪ Raw material use is reduced, which in turn reduces waste. 2. Why do car drivers feel more at ease with Uptis? Uptis is designed to be impervious to traditional tire failures due to air loss. It does not use compressed air. It therefore eliminates the need for regular inflation pressure maintenance. 3. What is the strategy behind Uptis? Uptis represents Michelin’s vision for the future of mobility. Michelin illustrated its vision of sustainable mobility through the Vision concept1, which the Group unveiled at the Movin’On World Summit on Sustainable Mobility in 2017. Uptis shows how Michelin is adhering to its roadmap for research and development, which comprises these four main pillars of innovation: Airless, Connected, 3D-printed and 100% Sustainable (i.e., renewable or bio-sourced materials). -
Blowout Resistant Tire Study for Commercial Highway Vehicles
Final Technical Report for Task Order No. 4 (DTRS57-97-C-00051) Blowout Resistant Tire Study for Commercial Highway Vehicles Z. Bareket D. F. Blower C. MacAdam The University of Michigan Transportation Research Institute August 31,2000 Technical Report Documen~tationPage Table of Contents 1. Overview ..................... ..........................................................................................1 2 . Crash Data Analysis of Truck Tire Blowouts ........................................ 3 Truck tire blowouts in FARS (Fatality Analysis Reporting System) and TIFA (Trucks Involved in Fatal Accidents) ........................................................................................3 Truck tire blowouts in GES .........................................................................................8 Fatalities and injuries in truck tire blowout crashes ..................................................10 State data analysis ....................................................................................................10 Crashes related to truck tire debris ...........................................................................12 3 . Information Review of Truck Tire Blowouts .........................................................15 Literature Review ................. .............................................................................15 Federal Motor Carrier Safety Regulations, Rules and Notices ...................................21 Patent Database Research ....................... .. .......................................................23 -
Traction of an Aircraft Tire on Grooved and Porous Asphaltic Concrete
Transportation Research Record 1000 15 Traction of an Aircraft Tire on Grooved and Porous Asphaltic Concrete SATISH K. AGRAWAL and HECTOR DAJUTOLO ABSTRACT however, their cost-effectiveness has been demon strated by the Federal Aviation Administration (FAA) in the portland cement concrete (PCC) surface by The Federal Aviation Administration is en full-scale tire tests under controlled dynamic con gaged in an experimental program to deter ditions (1). Because BO percent of all the runways mine the effectiveness of various surface in the united States are of asphaltic concrete con treatments to eliminate aircraft hydroplan struction, it is important to evaluate the effec ing when landing on wet runways. The surface tiveness of these experimental grooves cut in treatments included saw-cut grooves, reflex asphaltic concrete. It is also necessary to deter percussive grooves, and porous friction mine the relative braking performance of an aircraft overlays in the asphaltic concrete runways. tire, under controlled dynamic conditions, on saw Experiments were conducted on a 1.25-mile cut grooves cut in the asphaltic concrete surface, long track that included a 300-ft test bed particularly in the absence of any such investiga containing concrete with 40-ft sections of tion in the past. Full-scale aircraft tests have various surface treatments. Test speeds be been conducted on asphaltic concrete surfaces by the tween 70 and 150 knots were achieved by the National Aeronautics and Space Administration use of a jet-powered pusher car that also (NASA) i however, groove-spacing was not a variable supported a dynamometer and tire-wheel as in that study. -
MICHELIN® X® TWEEL Warranty Overview
MICHELIN® TWEEL® Airless radial tire Warranty Guide Contents MICHELIN® Tweel® Tire Warranty Overview ............................................................................. 3–4 Common Warranty Specifi cations ...............................................................................................5 Parts of a Tweel® Airless Radial Tire .............................................................................................5 Examination Tools .......................................................................................................................6 MICHELIN® X® TWEEL® SSL AIRLESS RADIAL TIRES Technical Specifi cations: MICHELIN® X® Tweel® SSL Tires .............................................................6 MICHELIN® X® Tweel® SSL Tire Torque Specs and Retreading .......................................................7 Tweel® SSL Tire Warranty vs. Wear Guide ..............................................................................8–12 MICHELIN® X® TWEEL® TURF AIRLESS RADIAL TIRES Technical Specifi cations: MICHELIN® X® Tweel® Turf Tires ...........................................................13 Tweel® Turf Tire Proper Installation Instructions ..........................................................................13 Tweel® Turf Tire Warranty vs. Wear Guide ........................................................................... 14–17 MICHELIN® X® TWEEL® CASTERS Technical Specifi cations: MICHELIN® X® Tweel® Casters..............................................................17 Tweel® Caster Warranty -
Mechanics of Pneumatic Tires
CHAPTER 1 MECHANICS OF PNEUMATIC TIRES Aside from aerodynamic and gravitational forces, all other major forces and moments affecting the motion of a ground vehicle are applied through the running gear–ground contact. An understanding of the basic characteristics of the interaction between the running gear and the ground is, therefore, essential to the study of performance characteristics, ride quality, and handling behavior of ground vehicles. The running gear of a ground vehicle is generally required to fulfill the following functions: • to support the weight of the vehicle • to cushion the vehicle over surface irregularities • to provide sufficient traction for driving and braking • to provide adequate steering control and direction stability. Pneumatic tires can perform these functions effectively and efficiently; thus, they are universally used in road vehicles, and are also widely used in off-road vehicles. The study of the mechanics of pneumatic tires therefore is of fundamental importance to the understanding of the performance and char- acteristics of ground vehicles. Two basic types of problem in the mechanics of tires are of special interest to vehicle engineers. One is the mechanics of tires on hard surfaces, which is essential to the study of the characteristics of road vehicles. The other is the mechanics of tires on deformable surfaces (unprepared terrain), which is of prime importance to the study of off-road vehicle performance. 3 4 MECHANICS OF PNEUMATIC TIRES The mechanics of tires on hard surfaces is discussed in this chapter, whereas the behavior of tires over unprepared terrain will be discussed in Chapter 2. A pneumatic tire is a flexible structure of the shape of a toroid filled with compressed air. -
Automotive Engineering II Lateral Vehicle Dynamics
INSTITUT FÜR KRAFTFAHRWESEN AACHEN Univ.-Prof. Dr.-Ing. Henning Wallentowitz Henning Wallentowitz Automotive Engineering II Lateral Vehicle Dynamics Steering Axle Design Editor Prof. Dr.-Ing. Henning Wallentowitz InstitutFürKraftfahrwesen Aachen (ika) RWTH Aachen Steinbachstraße7,D-52074 Aachen - Germany Telephone (0241) 80-25 600 Fax (0241) 80 22-147 e-mail [email protected] internet htto://www.ika.rwth-aachen.de Editorial Staff Dipl.-Ing. Florian Fuhr Dipl.-Ing. Ingo Albers Telephone (0241) 80-25 646, 80-25 612 4th Edition, Aachen, February 2004 Printed by VervielfältigungsstellederHochschule Reproduction, photocopying and electronic processing or translation is prohibited c ika 5zb0499.cdr-pdf Contents 1 Contents 2 Lateral Dynamics (Driving Stability) .................................................................................4 2.1 Demands on Vehicle Behavior ...................................................................................4 2.2 Tires ...........................................................................................................................7 2.2.1 Demands on Tires ..................................................................................................7 2.2.2 Tire Design .............................................................................................................8 2.2.2.1 Bias Ply Tires.................................................................................................11 2.2.2.2 Radial Tires ...................................................................................................12 -
Wear, Friction, and Temperature Characteristics of an Aircraft Tire Undergoing Braking and Cornering
https://ntrs.nasa.gov/search.jsp?R=19800004758 2020-03-21T20:55:26+00:00Z View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by NASA Technical Reports Server NASA Technical Paper 1569 Wear, Friction, and Temperature Characteristics of an Aircraft Tire Undergoing Brakingand Cornering John L. McCarty, Thomas J. Yager, and S. R.Riccitiello DECEMBER 19 79 . ~~ TECH LIBRARY KAFB, NM OL3477b NASA Technical Paper 1569 Wear, Friction, andTemperature Characteristics of an Aircraft Tire Undergoing Brakingand Cornering John L. McCarty and Thomas J. Yager Langley ResearchCellter HamptotZ, Virgitlia S. R.Riccitiello Ames ResearchCelzter MoffettField, Califoruia National Aeronautics and Space Administration Scientific and Technical Information Branch 1979 SUMMARY An experimental investigation was conducted to evaluate the wear, friction, and temperature characteristics of aircraft tire treads fabricated from differ- entelastomers. Braking and corneringtests were performed on size 22 X 5.5, type VI1 aircraft tires retreaded with currently employedand experimental elastomers. The braking testsconsisted of gearingthe tire to a driving wheel of a ground vehicle to provide operations at fixed slip ratios on dry surfaces ofsmooth and coarseasphalt and concrete. The corneringtests involved freely rolling the tire at fixed yaw angles of O0 to 24O on thedry smooth asphalt surface. The results show thatthe cumulative tread wear varieslinearly with distancetraveled at all slip ratios and yaw angles. Thewear rateincreases with increasing slip ratio duringbraking and increasing yaw angleduring cor- nering. The extent ofwear in eitheroperational mode is influenced by the character of the runway surface. Of thefour tread elastomers investigated, 100-percentnatural rubber was shown to be theleast wear resistant and the state-of-the-artelastomer, comprised of a 75/25 polyblend of cis-polyisoprene and cis-polybutadiene, proved most resistantto wear. -
The Conti Urbanscandinavia. GENERATION 3
People GENERATION 3. DRIVEN BY YOUR NEEDS. Technical data and air pressure recommendations Tire size Operating code EU tire label Rim Tire dimensions Load capacity (kg) per axle at tire Rolling 6) cir- pressure (bar) (psi) Min. cum- dis- Max. standard Stat. fer- Speed tance value in service Actual value radius ence Index and be- reference tween Outer- Tire speed TT/ Rim- rim Outer- Width Ø it- 3) 4) 5) 7.5 8.0 8.5 9.0 Pattern LI/SI 1) PR M+S (km / h) TL 2) K N G width centers Width Ø + 1 % ± 1 % ± 1.5 % ± 2 % LI 1) ment (109) (116) (123) (131) 275/70 R 22.5 Conti 150/145 J 16 M+S J 100 TL D C 2 73 7.50 303 279 974 267 968 449 2989 152 S 6135 6460 6780 7100 UrbanScan (152/148 E) (E 70) 8.25 311 287 282 150 S 5790 6095 6400 6700 HA3 148 D 10885 11465 12035 12600 145 D 10025 10555 11080 11600 Conti 150/145 J 16 M+S J 100 TL D C 2 75 UrbanScan (152/148 E) (E 70) HD3 Data acc. to DIN 7805/4, WdK£Guidelines 134/2, 142/2, 143/14, 143/25 1) Load index single/dual wheel itment and speed symbol 2) TT = Tube Type, TL = Tubeless 3) Fuel eiciency 4) Wet grip 5) External rolling noise (db) Whatever city road 6) For tire pressures of 8.0 bar (116 psi) or greater, use valve slit cover plate conditions in Winter: The Conti UrbanScandinavia. -
RFID for TIRES an Enabler for New Services
RFID FOR TIRES an enabler for new services Julien DESTRAVES R&D MICHELIN Page 1 / RAIN RFID Alliance / Julien DESTRAVES / June 2018 / INNOVATION is in MICHELIN DNA AIRLESS Tire CONNECTED Tire GREEN Tire RADIAL Tire TWEEL Page 2 / RAIN RFID Alliance / Julien DESTRAVES / June 2018 / AGENDA Benefits of RAIN RFID for tires and the associated challenges A Worldwide Standard for the Industry: ISO TC31 WG10 RFID Tire tags A Use Case example: Racing Tires Page 3 / RAIN RFID Alliance / Julien DESTRAVES / June 2018 / LIFE CYCLE AGAINST TIRE TAG INTEGRATION SCENARIOS Manufacturing 1st mounting After manufacturing equipment OEM Retreading Retrofitting End of Life Dealer Storage RFID embedded After retreading, embedded RFID identifies the carcass and not necessarily the tire RFID patch RFID patch possible RFID sticker RFID patch can identify the tire when not initially equipped with RFID Fair cost - Some lost on the way Page 4 / RAIN RFID Alliance / Julien DESTRAVES / June 2018 / WHY AND HOW TO USE RFID? ● Why to use RFID? 1. Guarantee of readability in all conditions • During the shelf life of the tire • During the entire tire life for a rolling tire • Leading to a far better traceability (even during tire manufacturing) • End of Life management potentially improved 2. Unfalsifiable: UII coding locked by the tire manufacturer 3. More robust against damages/ageing/robbery/counterfeiting 4. Fitting the needs of most stakeholders (OEM, Dealers, Governments, Retreaders, Tire manufacturers) 5. Better cost/benefit ratio (including the time to write and to read) 6. ISO standard for RFID Tire Tags available in 2018/19 7. Future readability of the RFID by the vehicle Page 5 / RAIN RFID Alliance / Julien DESTRAVES / June 2018 / BENEFIT FOR THE TIRE INDUSTRY Depending on the tag implementation technology 1. -
Development of a Steer Axle Tire Blowout Model For
DEVELOPMENT OF A STEER AXLE TIRE BLOWOUT MODEL FOR TRACTOR SEMITRAILERS IN TRUCKSIM THESIS Presented in Partial Fulfillment of the Requirements for the Degree Master of Science in the Graduate School of The Ohio State University By Krishnan Veeraraghavan Chakravarthy Graduate Program in Mechanical Engineering The Ohio State University 2013 Master's Examination Committee: Dr. Dennis A. Guenther, Advisor Dr. Gary Heydinger Copyright by Krishnan Chakravarthy Veeraraghavan 2013 ABSTRACT Tractor Semitrailer handling is one of the key issues in today’s highway traffic safety research. When accidents happen with tractor semitrailers, possibilities of multiple vehicle crashes are always high. Thus it is important to study the handling and control of tractor trailers in accident scenarios. Tire blowout is one of the most common types of failure which may cause vehicle crashes. With experimental testing for such studies being expensive, vehicle dynamic simulation goes a long way in supplementing the capabilities of real field testing. The primary goal of this thesis is to develop a tire blowout model for a tractor semitrailer in TruckSim¬¬TM. Experimental data from a left steer axle tire blowout of a tractor trailer is considered for modeling. The effect of tire blowout on vehicle dynamic aspects of the tire like rolling resistance, effective rolling radius, vertical stiffness and other tire forces are studied. The tractor semitrailer model is developed from previously conducted braking simulation models in TruckSim. From the experimental data, the behavior of the tractor trailer and the left steer axle tire are studied. A tire blowout model for the left steer axle of the tractor is created within TruckSim for simulation. -
The History of the Wheel and Bicycles
NOW & THE FUTURE THE HISTORY OF THE WHEEL AND BICYCLES COMPILED BY HOWIE BAUM OUT OF THE 3 BEST INVENTIONS IN HISTORY, ONE OF THEM IS THE WHEEL !! Evidence indicates the wheel was created to serve as potter's wheels around 4300 – 4000 BCE in Mesopotamia. This was 300 years before they were used for chariots. (Jim Vecchi / Corbis) METHODS TO MOVE HEAVY OBJECTS BEFORE THE WHEEL WAS INVENTED Heavy objects could be moved easier if something round, like a log was placed under it and the object rolled over it. The Sledge Logs or sticks were placed under an object and used to drag the heavy object, like a sled and a wedge put together. Log Roller Later, humans thought to use the round logs and a sledge together. Humans used several logs or rollers in a row, dragging the sledge over one roller to the next. Inventing a Primitive Axle With time, the sledges started to wear grooves into the rollers and humans noticed that the grooved rollers actually worked better, carrying the object further. The log roller was becoming a wheel, humans cut away the wood between the two inner grooves to create what is called an axle. THE ANCIENT GREEKS INVENTED WESTERN PHILOSOPHY…AND THE WHEELBARROW CHINA FOLLOWED 400 YEARS AFTERWARDS The wheelbarrow first appeared in Greece, between the 6th and 4th centuries BCE. It was found in China 400 years later and then ended up in medieval Europe. Although wheelbarrows were expensive to purchase, they could pay for themselves in just 3 or 4 days in terms of labor savings. -
Camber Effect Study on Combined Tire Forces
Camber effect study on combined tire forces Shiruo Li Master Thesis in Vehicle Engineering Department of Aeronautical and Vehicle Engineering KTH Royal Institute of Technology TRITA-AVE 2013:33 ISSN 1651-7660 Postal address Visiting Address Telephone Telefax Internet KTH Teknikringen 8 +46 8 790 6000 +46 8 790 6500 www.kth.se Vehicle Dynamics Stockholm SE-100 44 Stockholm, Sweden Abstract Considering the more and more concerned climate change issues to which the greenhouse gas emission may contribute the most, as well as the diminishing fossil fuel resource, the automotive industry is paying more and more attention to vehicle concepts with full electric or partly electric propulsion systems. Limited by the current battery technology, most electrified vehicles on the roads today are hybrid electric vehicles (HEV). Though fully electrified systems are not common at the moment, the introduction of electric power sources enables more advanced motion control systems, such as active suspension systems and individual wheel steering, due to electrification of vehicle actuators. Various chassis and suspension control strategies can thus be developed so that the vehicles can be fully utilized. Consequently, future vehicles can be more optimized with respect to active safety and performance. Active camber control is a method that assigns the camber angle of each wheel to generate desired longitudinal and lateral forces and consequently the desired vehicle dynamic behavior. The aim of this study is to explore how the camber angle will affect the tire force generation and how the camber control strategy can be designed so that the safety and performance of a vehicle can be improved.