Mechanics Of Fatigue

Author : Vladimir V. Bolotin
Publisher : CRC Press
Page : 210 pages
File Size : 44,5 Mb
Release : 1999-06-24
Category : Science
ISBN : 0849396638

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Mechanics of Fatigue by Vladimir V. Bolotin Pdf

Mechanics of Fatigue addresses the range of topics concerning damage, fatigue, and fracture of engineering materials and structures. The core of this resource builds upon the synthesis of micro- and macro-mechanics of fracture. In micromechanics, both the modeling of mechanical phenomena on the level of material structure and the continuous approach are based on the use of certain internal field parameters characterizing the dispersed micro-damage. This is referred to as continuum damage mechanics. The author develops his own theory for macromechanics, called analytical fracture mechanics. This term means the system cracked body - loading or loading device - is considered as a mechanical system and the tools of analytical (rational) mechanics are applied thoroughly to describe crack propagation until the final failure. Chapter discuss: preliminary information on fatigue and engineering methods for design of machines and structures against failures caused by fatigue fatigue crack nucleation, including microstructural and continuous models theory of fatigue crack propagation fatigue crack growth in linear elastic materials subject to dispersed damage fatigue cracks in elasto-plastic material, including crack growth retardation due to overloading as well as quasistationary approximation fatigue and related phenomena in hereditary solids application of the theory fatigue crack growth considering environmental factors unidirectional fiber composites with ductile matrix and brittle, initially continuous fibers laminate composites Mechanics of Fatigue serves students dealing with mechanical aspects of fatigue, conducting research in fracture mechanics, structural safety, mechanics of composites, as well as modern branches of mechanics of solids and structures.

Author : D.A. Hills,D. Nowell
Publisher : Springer Science & Business Media
Page : 251 pages
File Size : 45,8 Mb
Release : 2013-03-09
Category : Technology & Engineering
ISBN : 9789401582810

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Mechanics of Fretting Fatigue by D.A. Hills,D. Nowell Pdf

Failures of many mechanical components in service result from fatigue. The cracks which grow may either originate from some pre-existing macroscopic defect, or, if the component is of high integrity but highly stressed, a region of localized stress concentration. In turn, such concentrators may be caused by some minute defect, such as a tiny inclusion, or inadvertent machining damage. Another source of surface damage which may exist between notionally 'bonded' components is associated with minute relative motion along the interface, brought about usually be cyclic tangential loading. Such fretting damage is quite insidious, and may lead to many kinds of problems such as wear, but it is its influence on the promotion of embryo cracks with which we are concerned here. When the presence of fretting is associated with decreased fatigue performance the effect is known as fretting fatigue. Fretting fatigue is a subject drawing equally on materials science and applied mechanics, but it is the intention in this book to concentrate attention entirely on the latter aspects, in a search for the quantification of the influence of fretting on both crack nucleation and propagation. There have been very few previous texts in this area, and the present volume seeks to cover five principal areas; (a) The modelling of contact problems including partial slip under tangentialloading, which produces the surface damage. (b) The modelling of short cracks by rigorous methods which deal effectively with steep stress gradients, kinking and closure. (c) The experimental simulation of fretting fatigue.

Author : José A.F.O. Correia,Abílio M.P. De Jesus,António Augusto Fernandes,Rui Calçada
Publisher : Springer
Page : 413 pages
File Size : 48,7 Mb
Release : 2019-05-07
Category : Science
ISBN : 9783030139803

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Mechanical Fatigue of Metals by José A.F.O. Correia,Abílio M.P. De Jesus,António Augusto Fernandes,Rui Calçada Pdf

This volume contains the proceedings of the XIX International Colloquium on Mechanical Fatigue of Metals, held at the Faculty of Engineering of the University of Porto, Portugal, 5-7 September 2018. This International Colloquium facilitated and encouraged the exchange of knowledge and experiences among the different communities involved in both basic and applied research in the field of the fatigue of metals, looking at the problem of fatigue exploring analytical and numerical simulative approaches. Fatigue damage represents one of the most important types of damage to which structural materials are subjected in normal industrial services that can finally result in a sudden and unexpected abrupt fracture. Since metal alloys are still today the most used materials in designing the majority of components and structures able to carry the highest service loads, the study of the different aspects of metals fatigue attracts permanent attention of scientists, engineers and designers.

Author : Bahram Farahmand,George Bockrath,James Glassco
Publisher : Springer Science & Business Media
Page : 386 pages
File Size : 48,6 Mb
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 9781461560098

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Fatigue and Fracture Mechanics of High Risk Parts by Bahram Farahmand,George Bockrath,James Glassco Pdf

In the preliminary stage of designing new structural hardware that must perform a given mission in a fluctuating load environment, there are several factors the designers should consider. Trade studies for different design configurations should be performed and, based on strength and weight considerations, among others, an optimum configuration selected. The selected design must be able to withstand the environment in question without failure. Therefore, a comprehen sive structural analysis that consists of static, dynamic, fatigue, and fracture is necessary to ensure the integrity of the structure. During the past few decades, fracture mechanics has become a necessary discipline for the solution of many structural problems. These problems include the prevention of failures resulting from preexisting cracks in the parent material, welds or that develop under cyclic loading environment during the life of the structure. The importance of fatigue and fracture in nuclear, pressure vessel, aircraft, and aerospace structural hardware cannot be overemphasized where safety is of utmost concern. This book is written for the designer and strength analyst, as well as for the material and process engineer who is concerned with the integrity of the structural hardware under load-varying environments in which fatigue and frac ture must be given special attention. The book is a result of years of both acade mic and industrial experiences that the principal author and co-authors have accumulated through their work with aircraft and aerospace structures.

Author : E.E. Gdoutos,C.A. Rodopoulos,J.R. Yates
Publisher : Springer Science & Business Media
Page : 573 pages
File Size : 46,8 Mb
Release : 2013-06-29
Category : Science
ISBN : 9789401727747

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Problems of Fracture Mechanics and Fatigue by E.E. Gdoutos,C.A. Rodopoulos,J.R. Yates Pdf

On Fracture Mechanics A major objective of engineering design is the determination of the geometry and dimensions of machine or structural elements and the selection of material in such a way that the elements perform their operating function in an efficient, safe and economic manner. For this reason the results of stress analysis are coupled with an appropriate failure criterion. Traditional failure criteria based on maximum stress, strain or energy density cannot adequately explain many structural failures that occurred at stress levels considerably lower than the ultimate strength of the material. On the other hand, experiments performed by Griffith in 1921 on glass fibers led to the conclusion that the strength of real materials is much smaller, typically by two orders of magnitude, than the theoretical strength. The discipline of fracture mechanics has been created in an effort to explain these phenomena. It is based on the realistic assumption that all materials contain crack-like defects from which failure initiates. Defects can exist in a material due to its composition, as second-phase particles, debonds in composites, etc. , they can be introduced into a structure during fabrication, as welds, or can be created during the service life of a component like fatigue, environment-assisted or creep cracks. Fracture mechanics studies the loading-bearing capacity of structures in the presence of initial defects. A dominant crack is usually assumed to exist.

Author : Subra Suresh
Publisher : Cambridge University Press
Page : 708 pages
File Size : 47,5 Mb
Release : 1998-10-29
Category : Technology & Engineering
ISBN : 0521578477

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Fatigue of Materials by Subra Suresh Pdf

Written by a leading researcher in the field, this revised and updated second edition of a highly successful book provides an authoritative, comprehensive and unified treatment of the mechanics and micromechanisms of fatigue in metals, non-metals and composites. The author discusses the principles of cyclic deformation, crack initiation and crack growth by fatigue, covering both microscopic and continuum aspects. The book begins with discussions of cyclic deformation and fatigue crack initiation in monocrystalline and polycrystalline ductile alloys as well as in brittle and semi-/non-crystalline solids. Total life and damage-tolerant approaches are then introduced in metals, non-metals and composites followed by more advanced topics. The book includes an extensive bibliography and a problem set for each chapter, together with worked-out example problems and case studies. This will be an important reference for anyone studying fracture and fatigue in materials science and engineering, mechanical, civil, nuclear and aerospace engineering, and biomechanics.

Author : F. C. Campbell
Publisher : ASM International
Page : 699 pages
File Size : 55,9 Mb
Release : 2012-01-01
Category : Technology & Engineering
ISBN : 9781615039760

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Fatigue and Fracture by F. C. Campbell Pdf

"This book emphasizes the physical and practical aspects of fatigue and fracture. It covers mechanical properties of materials, differences between ductile and brittle fractures, fracture mechanics, the basics of fatigue, structural joints, high temperature failures, wear, environmentally-induced failures, and steps in the failure analysis process."--publishers website.

Author : J. Schijve
Publisher : Springer Science & Business Media
Page : 627 pages
File Size : 45,9 Mb
Release : 2008-12-16
Category : Science
ISBN : 9781402068089

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Fatigue of Structures and Materials by J. Schijve Pdf

Fatigue of structures and materials covers a wide scope of different topics. The purpose of the present book is to explain these topics, to indicate how they can be analyzed, and how this can contribute to the designing of fatigue resistant structures and to prevent structural fatigue problems in service. Chapter 1 gives a general survey of the topic with brief comments on the signi?cance of the aspects involved. This serves as a kind of a program for the following chapters. The central issues in this book are predictions of fatigue properties and designing against fatigue. These objectives cannot be realized without a physical and mechanical understanding of all relevant conditions. In Chapter 2 the book starts with basic concepts of what happens in the material of a structure under cyclic loads. It illustrates the large number of variables which can affect fatigue properties and it provides the essential background knowledge for subsequent chapters. Different subjects are presented in the following main parts: • Basic chapters on fatigue properties and predictions (Chapters 2–8) • Load spectra and fatigue under variable-amplitude loading (Chapters 9–11) • Fatigue tests and scatter (Chapters 12 and 13) • Special fatigue conditions (Chapters 14–17) • Fatigue of joints and structures (Chapters 18–20) • Fiber-metal laminates (Chapter 21) Each chapter presents a discussion of a speci?c subject.

Author : Pietro Paolo Milella
Publisher : Springer Nature
Page : 965 pages
File Size : 40,9 Mb
Release : 2024-06-30
Category : Electronic
ISBN : 9783031513503

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Fatigue and Corrosion in Metals by Pietro Paolo Milella Pdf

Author : Ted L. Anderson,T. L. Anderson
Publisher : CRC Press
Page : 642 pages
File Size : 43,7 Mb
Release : 2005-06-24
Category : Science
ISBN : 9780849316562

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Fracture Mechanics by Ted L. Anderson,T. L. Anderson Pdf

With its combination of practicality, readability, and rigor that is characteristic of any truly authoritative reference and text, Fracture Mechanics: Fundamentals and Applications quickly established itself as the most comprehensive guide to fracture mechanics available. It has been adopted by more than 100 universities and embraced by thousands of professional engineers worldwide. Now in its third edition, the book continues to raise the bar in both scope and coverage. It encompasses theory and applications, linear and nonlinear fracture mechanics, solid mechanics, and materials science with a unified, balanced, and in-depth approach. Reflecting the many advances made in the decade since the previous edition came about, this indispensable Third Edition now includes: A new chapter on environmental cracking Expanded coverage of weight functions New material on toughness test methods New problems at the end of the book New material on the failure assessment diagram (FAD) method Expanded and updated coverage of crack closure and variable-amplitude fatigue Updated solutions manual In addition to these enhancements, Fracture Mechanics: Fundamentals and Applications, Third Edition also includes detailed mathematical derivations in appendices at the end of applicable chapters; recent developments in laboratory testing, application to structures, and computational methods; coverage of micromechanisms of fracture; and more than 400 illustrations. This reference continues to be a necessity on the desk of anyone involved with fracture mechanics.

Author : F. Ellyin
Publisher : Springer Science & Business Media
Page : 484 pages
File Size : 40,8 Mb
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 9789400915091

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Fatigue Damage, Crack Growth and Life Prediction by F. Ellyin Pdf

Fatigue failure is a multi-stage process. It begins with the initiation of cracks, and with continued cyclic loading the cracks propagate, finally leading to the rupture of a component or specimen. The demarcation between the above stages is not well-defined. Depending upon the scale of interest, the variation may span three orders of magnitude. For example, to a material scientist an initiated crack may be of the order of a micron, whereas for an engineer it can be of the order of a millimetre. It is not surprising therefore to see that investigation of the fatigue process has followed different paths depending upon the scale of phenomenon under investigation. Interest in the study of fatigue failure increased with the advent of industrial ization. Because of the urgent need to design against fatigue failure, early investiga tors focused on prototype testing and proposed failure criteria similar to design formulae. Thus, a methodology developed whereby the fatigue theories were proposed based on experimental observations, albeit at times with limited scope. This type of phenomenological approach progressed rapidly during the past four decades as closed-loop testing machines became available.

Author : Wolf Elber
Publisher : ASTM International
Page : 671 pages
File Size : 40,6 Mb
Release : 1988
Category : Fracture mechanics
ISBN : 9780803109964

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Mechanics of Fatigue Crack Closure by Wolf Elber Pdf

Author : Theodore Nicholas
Publisher : Elsevier
Page : 656 pages
File Size : 52,6 Mb
Release : 2006-07-07
Category : Science
ISBN : 0080458874

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High Cycle Fatigue by Theodore Nicholas Pdf

Dr Theodore Nicholas ran the High Cycle Fatigue Program for the US Air Force between 1995 and 2003 at Wright-Patterson Air Force Base, and is one of the world’s leading authorities on the subject, having authored over 250 papers in leading archival journals and books. Bringing his plethora of expertise to this book, Dr Nicholas discusses the subject of high cycle fatigue (HCF) from an engineering viewpoint in response to a series of HCF failures in the USAF and the concurrent realization that HCF failures in general were taking place universally in both civilian and military engines. Topic covered include: Constant life diagrams Fatigue limits under combined LCF and HCF Notch fatigue under HCF conditions Foreign object damage (FOD) Brings years of the Author's US Air Force experience in high cycle fatigue together in one text Discusses HCF in the context of recent international military and civilian engine failures

Author : Claude Bathias,Paul C. Paris
Publisher : CRC Press
Page : 327 pages
File Size : 51,5 Mb
Release : 2004-09-13
Category : Science
ISBN : 9780203020609

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Gigacycle Fatigue in Mechanical Practice by Claude Bathias,Paul C. Paris Pdf

Written by pioneers in the study and analysis of very high cycle fatigue this text brings together the most recent findings on gigacycle fatigue phenomena, focusing on improving the reliability and performance of key engine and machine components. This reference reflects the explosion of new concepts, testing methods, and data on very high cycle fa

Author : Uwe Zerbst,Mauro Madia,Benjamin Schork,Jonas Hensel,Pawel Kucharczyk,DesireTchoffo Ngoula,Didi Tchuindjang,Julian Bernhard,Carla Beckmann
Publisher : Springer
Page : 157 pages
File Size : 43,6 Mb
Release : 2018-12-11
Category : Technology & Engineering
ISBN : 9783030040734

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Fatigue and Fracture of Weldments by Uwe Zerbst,Mauro Madia,Benjamin Schork,Jonas Hensel,Pawel Kucharczyk,DesireTchoffo Ngoula,Didi Tchuindjang,Julian Bernhard,Carla Beckmann Pdf

This book provides a comprehensive and thorough guide to those readers who are lost in the often-confusing context of weld fatigue. It presents straightforward information on the fracture mechanics and material background of weld fatigue, starting with fatigue crack initiation and short cracks, before moving on to long cracks, crack closure, crack growth and threshold, residual stress, stress concentration, the stress intensity factor, J-integral, multiple cracks, weld geometries and defects, microstructural parameters including HAZ, and cyclic stress-strain behavior. The book treats all of these essential and mutually interacting parameters using a unique form of analysis.