Download or read book Predicting the Fatigue Life of Elastomer Components written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fatigue Life Prediction and Modeling of Elastomeric Components written by Touhid Zarrin-Ghalami and published by . This book was released on 2013 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study investigates constitutive behavior, material properties and fatigue damage under constant and variable amplitude uniaxial and multiaxial loading conditions, with the goal of developing CAE analytical techniques for durability and life prediction of elastomeric components. Such techniques involve various topics including material monotonic and cyclic deformation behaviors, proper knowledge of stress/strain histories, fatigue damage quantification parameters, efficient event identification methods, and damage accumulation rules. Elastomeric components are widely used in many applications, including automobiles due to their good damping and energy absorption characteristics. The type of loading normally encountered by these components in service is variable amplitude cyclic loading. Therefore, fatigue failure is a major consideration in their design and availability of an effective technique to predict fatigue life under complex loading is very valuable to the design procedure. In this work a fatigue life prediction methodology for rubber components is developed which is then verified by means of analysis and testing of an automobile cradle mount made of filled natural rubber. The methodology was validated with component testing under different loading conditions including constant and variable amplitude in-phase and out-of-phase axial-torsion experiments. The analysis conducted includes constitutive behavior representation of the material, finite element analysis of the component, and a fatigue damage parameter for life predictions. In addition, capabilities of Rainflow cycle counting procedure and Miner's linear cumulative damage rule are evaluated. Fatigue characterization typically includes both crack nucleation and crack growth. Therefore, relevant material deformation and fatigue properties are obtained from experiments conducted under stress states of simple tension and planar tension. For component life predictions, both fatigue crack initiation approach as well as fatigue crack growth approach based on fracture mechanics are presented. Crack initiation life prediction was performed using different damage criteria. The optimum method for crack initiation life prediction for complex multiaxial variable amplitude loading was found to be a critical plane approach based on maximum normal strain plane and damage quantification by cracking energy density on that plane. The fracture mechanics approach was used for total fatigue life prediction of the component based on specimen crack growth data and FE simulation results. Total fatigue life prediction results showed good agreement with experiments for all of the loading conditions considered.
Download or read book Fatigue Stress and Strain of Rubber Components written by Judson T. Bauman and published by Hanser Verlag. This book was released on 2008 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book covers the fatigue testing of specimens, curve fitting of equations to the test data, and the use of such equations in life prediction. Earlier chapters are background in the nature of rubber, history of its usage, brief mention of types of rubber and manufacturing methods. Stress-strain testing and behavior will be covered to the extent relevant to fatigue analysis. Also the text will cover the application of finite element analysis to components to determine high stress points which are vulnerable to fatigue failure.
Download or read book Elastomers and Components written by V A Coveney and published by Woodhead Publishing. This book was released on 2006-10-30 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elastomeric components are widely used in engineering. Increasing demands are placed on them to withstand hostile conditions such as high temperature and corrosive environments. These demands make it harder to predict likely service life or improve design to ensure their longer-term performance. This important book reviews the wealth of research on understanding fatigue and failure in elastomers, and how this understanding can be used to predict and extend their service life.The first part of the book reviews factors determining ageing behaviour such as heat, corrosive environments, wear and cracking. It also discusses the strengths and weaknesses of current service prediction models. The second part of the book focuses on analysing and improving the design and service life of particular applications such as O-rings, bearings, springs and valves.With its distinguished editor and team of contributors, Elastomers and components: service life prediction; progress and challenges is an invaluable reference for engineers involved in the design and use of elastomers. - Looks at the wealth of research on understanding fatigue and failure in elastomers - Discusses the strengths and weaknesses of current service prediction models - An invaluable reference for engineers
Download or read book Fatigue Stress and Strain of Rubber Components written by Judson T. Bauman, Ph.D and published by Carl Hanser Verlag GmbH Co KG. This book was released on 2012-11-12 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text emphasizes the mechanical behavior of elastomers. It discusses the molecular and micro configuration of the rubber matrix and how they produce the observed mechanical behavior. The fatigue testing of specimens, curve fitting of equations to the test data, and the use of such equations in life prediction are covered compehensively. Stress-strain testing and behavior are covered to the extent relevant to fatigue analysis. Also, the text covers the application of finite element analysis to components to determine high stress points which are vulnerable to fatigue failure. The book presents a very useful reference for practicing engineers charged with responsibility to design structural rubber components where fatigue life is a concern. It is aimed at aiding the design engineer in practical service life estimations and testing of rubber materials to that end.
Download or read book Fatigue Lifetime Prediction of Angle Plied Fiber Reinforced Elastomer Composites as Pneumatic Tire Materials written by PK. Hippo and published by . This book was released on 1993 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: An initiative is underway to realign the test procedure where the emphasis is placed on more cost-effective and less empirical laboratory predictions of fatigue life of aircraft tires. The initial goals are to define the deformation and fracture mechanisms of various critical regions of aircraft tires and to identify the parameters that control the process of fatigue damage accumulation for cord-reinforced elastomer composite elements. The first phase of our study is focused on the delamination of bias aircraft tire carcass in the shoulder area. The study examined the effect of a broad range of the combination between different loading parameters on the fatigue resistance of angle-plied elastomer composites. Among them, stress amplitude was found to play a dominant role in determining fatigue lifetime of composites. The damage accumulation process of composites was accompanied by a continuous increase of cyclic strain (i.e., dynamic creep), temperature and acoustic emission (AE). The dynamic creep rate and the rate of temperature increase were inversely proportional to the fatigue life according to a power law. When the minimum cyclic stress was high enough, distinctly different rates of AE signal accumulation could be assigned to the cord-matrix debonding and delamination failure modes. The results demonstrated a great potential of the measurement of local strain change, heat generation, and AE as a viable experimental technique for real-time monitoring of the damage accumulation process. Finite element analysis was used to approximate the stress and strain components in the composite coupon specimens. Two finite element models were created using 75 and 1500 elements, respectively. The 1500 element model was shown to produce much better results for the ?z stress distribution, while both models produced similar results for the ?x and ?xz stress distributions. The predictions were in good agreement with the total axial load measured experimentally.
Download or read book Advances in Fatigue Lifetime Predictive Techniques written by Michael R. Mitchell and published by ASTM International. This book was released on 1996 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fatigue Crack Growth in Rubber Materials written by Gert Heinrich and published by Springer Nature. This book was released on 2021-03-23 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book summarizes recent international research and experimental developments regarding fatigue crack growth investigations of rubber materials. It shows the progress in fundamental as well as advanced research of fracture investigation of rubber material under fatigue loading conditions, especially from the experimental point of view. However, some chapters will describe the progress in numerical modeling and physical description of fracture mechanics and cavitation phenomena in rubbers. Initiation and propagation of cracks in rubber materials are dominant phenomena which determine the lifetime of these soft rubber materials and, as a consequence, the lifetime of the corresponding final rubber parts in various fields of application. Recently, these phenomena became of great scientific interest due to the development of new experimental methods, concepts and models. Furthermore, crack phenomena have an extraordinary impact on rubber wear and abrasion of automotive tires; and understanding of crack initiation and growth in rubbers will help to support the growthing number of activities and worldwide efforts of reduction of tire wear losses and abrasion based emissions.
Download or read book Stiffness and Fatigue Failure Prediction of Bonded Elastomeric Components written by and published by . This book was released on 2002 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Degradation of Elastomers in Practice Experiments and Modeling written by Gert Heinrich and published by Springer Nature. This book was released on 2022-10-14 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume describes new insights into the main aspects of rubber degradation by material’s fatigue, wear and aging evolution, as well as their impact on mechanical rubber properties. It provides a thorough state-of-art explanation of the essential chemical, physical and mechanical principles as well as practices of material characterization for wear prediction, and to convey or define novel strategies and procedures of planning effective wear test programs. The initiating factors of abrasion, the development of surface abrasion on sharp and blunt tracks (so called cutting and chipping) and the influence of smear and lubricants is also summarized. The volume is of interest to research scientists in related fields from academia and industry.
Download or read book Service Life Assessment of Elastomers written by V. Coveny and published by Maney Pub. This book was released on 2004-06 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: This multi-author book is the first in a new series from the Institute of Materials, Minerals and Mining's Rubber in Engineering Committee. It presents the basic principles underlying the service life prediction of elastomers in engineering applications and includes a number of case studies. Elastomeric materials are almost ubiquitous in engineering, yet such materials are rarely included in the typical engineering curriculum. The net result is that engineers in industry are often ill prepared for the unique problems associated with designing elastomers. This book aims to redress the balance in the area of life prediction and to inform the reader of the benefits and limitations of established and emerging approaches.
Download or read book Constitutive Models for Rubber III written by J. Busfield and published by CRC Press. This book was released on 2003-01-01 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent developments in the modelling of rubber are collated in this volume, including not only stress-strain behaviour and the use of the large strain finite element method for simulation, but also fatigue, fracture, filler reinforcement, dynamic properties and the effects of ageing.
Download or read book Advances in Fatigue Lifetime Predictive Techniques Second Volume written by Michael R. Mitchell and published by ASTM International. This book was released on 1993 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fatigue Durability and Fracture Mechanics written by S. Seetharamu and published by Springer Nature. This book was released on 2020-10-01 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents selected papers presented during Fatigue Durability India 2019. The contents of this volume discuss advances in the field of fatigue, durability, and fracture, and cover mechanical failure and its applications. The chapters cover a wide spectrum of topics, including design, engineering, testing and computational evaluation of the components or systems for fatigue, durability, and fracture mechanics. The contents of this book will appeal not only to academic researchers, but also to design engineers, failure analysts, maintenance engineers, certification personnel, and R&D professionals involved in a wide variety of industries.
Download or read book Advanced Elastomers written by Anna Boczkowska and published by BoD – Books on Demand. This book was released on 2012-09-12 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an extensive overview of current trends in the area of elastomers and their composites from the chapters contributed by internationally recognized specialists. The book deals with novel synthesis, modelling and experimental methods in elastomers. Contents include: new approach to crosslinking, liquid crystal elastomers, nanocomposites, smart elastomers, elastomers in microelectronics and microfluidics, elastomers in cement concrete and mortar, experimental testing and modelling. Each section demonstrates how enhancements in materials, processes and characterization techniques can improve performance in the field of engineering. The book provides a unique opportunity to discover the latest research on elastomer advances from laboratories around the world. This book addresses to industrial and academic researchers in the fields of physical, chemical, biological sciences and engineering.
Download or read book Rubber Product Failure written by Roger P. Brown and published by iSmithers Rapra Publishing. This book was released on 2002 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rubber components are used in many demanding applications, from tyres and seals to gloves and medical devices, and failure can be catastrophic. This review of Rubber Product Failure outlines and illustrates the common causes of failure, while addressing ways of avoiding it. There has been increasing pressure to improve performance so that rubbers can be used at higher temperatures and in harsher environments. For example, the under-the-bonnet temperature has increased in some vehicles and new medical devices require longer lifetimes in potentially degrading biological fluids. The expectations of tyre performance in particular are increasing, and retreads have been in the spotlight for failures. The definition of failure depends on the application. For example, a racing car engine seal that lasts for one race may be acceptable, but in a normal car a life span of 10 years is more reasonable. If appearance is critical as in surface coatings and paints, then discolouration is failure, whilst in seals leakage is not acceptable. Each rubber product must be fit for the use specified by the consumer. Failure analysis is critical to product improvement. the cause of the problem can be much harder to find. It can range from a design fault to poor material selection, to processing problems, to manufacturing errors such as poor dimensional tolerances, to poor installation, product abuse and unexpected service conditions. The rubber technologist must become a detective, gathering evidence, understanding the material type and using deductive reasoning. Testing and analysis of failed materials and components add to the information available for failure analysis. For example, stored aged tyres appeared superficially to be alright for use, but on drum testing small cracks grew more quickly than in new tyres leading to rapid failure in service. Quality control procedures such as product inspection, testing and material quality checks can help to reach 100 percent reliability. In critical applications such as electricians' gloves for high voltage working, gloves are inspected before each use, while engine seals may be routinely replaced before the expected lifetime to avoid problems. in the literature is not high. However, several reviews have been written on specific products and references can be found at the end of this review. Around 400 abstracts from papers in the Polymer Library are included with an index. Subjects covered include tyre wear and failure, seals, engine components, rubber bonding failure, rubber failure due to chloramine in water, tank treads, gloves and condoms, medical devices and EPDM roofing membranes.
Download or read book Low cycle Fatigue and Life Prediction written by Claude Amzallag and published by ASTM International. This book was released on 1982 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt:
