Download or read book An Analysis of Fretting Damage on Fatigue Strength written by Hsing-chung Yeh and published by . This book was released on 1975 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fretting Fatigue written by Steven E. Kinyon and published by ASTM International. This book was released on 2003 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains 29 contributions drawn from the Third International Symposium on Fretting Fatigue held in Nagaoka, Japan in May 2001. Sections of the volume address fretting wear and crack initiation; fretting fatigue crack and damage; life prediction; fretting fatigue parameter effects; loading condition

Download or read book Fretting Fatigue written by David W. Hoeppner and published by ASTM International. This book was released on 2000 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume includes 36 of the 40 papers presented at the symposium, and a collection of six keynote papers providing background on the subject. Topics covered include parameter effects, environmental effects, crack nucleation, material and microstructural effects, damage analysis, fracture mechanic

Download or read book Standardization of Fretting Fatigue Test Methods and Equipment written by Mahmoud Helmi Attia and published by ASTM International. This book was released on 1992 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fretting Wear and Fretting Fatigue written by Tomasz Liskiewicz and published by Elsevier. This book was released on 2022-12-07 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fretting Wear and Fretting Fatigue: Fundamental Principles and Applications takes a combined mechanics and materials approach, providing readers with a fundamental understanding of fretting phenomena, related modeling and experimentation techniques, methods for mitigation, and robust examples of practical applications across an array of engineering disciplines. Sections cover the underpinning theories of fretting wear and fretting fatigue, delve into experimentation and modeling methods, and cover a broad array of applications of fretting fatigue and fretting wear, looking at its impacts in medical implants, suspension ropes, bearings, heating exchangers, electrical connectors, and more. Covers theoretical fundamentals, modeling and experimentation techniques, and applications of fretting wear and fatigue Takes a combined mechanics and materials approach Discusses the differences and similarities between fretting wear and fretting fatigue as well as combined experimental and modeling methods Covers applications including medical implants, heat exchangers, bearings, automotive components, gas turbines, and more

Download or read book Fretting Fatigue written by Robert Barry Waterhouse and published by Elsevier Science & Technology. This book was released on 1981 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fretting Fatigue Analysis and Palliatives written by Gary Wayne Kirkpatrick and published by . This book was released on 1999 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: The deleterious effects of fretting on the fatigue properties of a material have been known since the work of Warlow-Davies in 1941. However, a widely accepted fretting fatigue life prediction method still does not exist and debates persist as to what the critical parameter(s) for fretting fatigue are. This work demonstrates that the surface stresses due to contact can be used to characterize the damaging effects of fretting on the fatigue properties of a material. The elastic stress analysis performed by Hamilton for a sphere on flat plane fretting geometry is used to determine the stresses due to contact for various experimental conditions provided in previous work. It is shown that the specimen fretting fatigue life is directly related to the surface stresses induced in the material by fretting. fretting fatigue life prediction methods are analyzed. The stress-life approach, which is widely used in industry, is examined for its applicability for fretting fatigue conditions. The damage tolerant approach is used to determine the relative magnitudes of the crack nucleation and long crack propagation stages of fretting fatigue life. An analysis of fretting fatigue palliatives, focusing on shot peening and coatings, is presented. A systematic method to determine the optimum shot peening depth for fretted components is proposed. The method uses the elastic stress field expressions derived by Hamilton for a sphere on flat surface contact geometry and is demonstrated for Ti-6Al-4V. However, the method is general and can be applied for any material and any contact geometry which allows analytic evaluation of the stress fields.

Download or read book Mechanics of Fretting Fatigue written by D.A. Hills and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Fretting Wear Fretting Fatigue and Damping of Structures written by Toshio Hattori and published by Springer Nature. This book was released on 2023-12-26 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of the mechanical distinctions between fretting damage under axial or bending external forces and fretting damage under a torsional load. It emphasizes the importance of studying practical accident cases to efficiently acquire technical skills. The book is structured around the fundamental technologies of material science, tribology, and mechanics, which are vital for understanding and addressing technical issues. The author has incorporated all fretting countermeasure technologies, which were previously often sensory and empirical in nature, and repositioned them as technologies grounded in fundamental principles. The book proposes an economical approach to product operation that maintains reliability by integrating not only design technology but also maintenance practices. It delves into specific materials, such as titanium alloys and aluminum alloys, which have seen increased use for weight reduction in industries like aerospace. In this book, “Critical Distance Stress Theory” that can easily derive the fatigue limit and fatigue life of the stress singular field at the contact edge was presented. As a result, the fretting fatigue strength and life can be predicted from the same FEM stress analysis as the normal stress concentration part. And finally, introducing a novel fretting mechanical model, the book focuses on scenarios where pressure force (N) and repeated tangential force (F) are applied to two planar objects, with the tangential force being transmitted solely through friction at the contact surface. This model finds relevance in turbine blade connection structures, among other applications. The author references Asai's research example, which encompasses fretting mechanical analysis, fretting wear evaluation, fatigue assessment, and structural damping evaluation using this model.

Download or read book The Effect of Contact Geometry on Fretting Fatigue written by Graham Roberts and published by . This book was released on 1975 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some recent research literature has proposed that the initiation of fatigue cracks under fretting conditions is largely dependent on the local macroscopic stress distribution in the contact area. The work reported herein is an.

Download or read book Tribocorrosion of Passive Metals and Coatings written by D Landolt and published by Elsevier. This book was released on 2011-10-12 with total page 585 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tribocorrosion causes the degradation or alteration of materials through the combined action of corrosion and wear. It limits the performance and life-time of installations, machines and devices with moving parts, and controls certain manufacturing processes such as chemical–mechanical polishing. The effects of tribocorrosion are most pronounced on passive metals which owe their corrosion resistance to a thin protecting oxide film. Most corrosion-resistant engineering alloys belong to this category.This book provides an introduction to the developing field of tribocorrosion and an overview of the latest research. Part one reviews basic notions of corrosion and tribology, before presenting the most recent results on the growth and structure of passive oxide films. Tribocorrosion mechanisms under fretting, sliding and erosion conditions, respectively, are then discussed. Part two focuses on methods for measuring and preventing tribocorrosion. It includes chapters on electrochemical techniques, the design of tribocorrosion test equipment, data evaluation and the optimisation of materials’ properties for tribocorrosion systems. Part three presents a selection of tribocorrosion problems in engineering and medicine. Three chapters address the tribocorrosion of medical implants including test methods and clinical implications. Other chapters examine tribocorrosion issues in nuclear power plants, marine environments, automotive cooling circuits, elevated-temperature metal working and chemical–mechanical polishing.With its distinguished editors and international team of expert contributors Tribocorrosion of passive metals and coatings is an invaluable reference tool for engineers and researchers in industry and academia confronted with tribocorrosion problems. Comprehensively reviews current research on the tribocorrosion of passive metals and coatings, with particular reference to the design of tribocorrosion test equipment, data evaluation and the optimisation of materials’ properties for tribocorrosion systems Chapters discuss tribocorrosion mechanisms under fretting, sliding and erosion conditions before focussing on methods for measuring and preventing tribocorrosion Includes a comprehensive selection of tribocorrosion problems in engineering and medicine, such as the tribocorrosion of medical implants, and tribocorrosion issues in nuclear power plants, marine environments, automotive cooling circuits and elevated-temperature metal working

Download or read book Fretting Corrosion written by Raymond H. Comyn and published by . This book was released on 1963 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data from over 200 reports from the English literature on fretting corrosion were summarized for ready reference--for engineers who must consider its effect in designing mechanical and electrical devices and for scientists who may wish to investigate the underlying mechanism. The actual wear, frictional changes, variations in electrical resistances and electrical noise, and fatigue due to fretting are described to acquaint the designer with difficulties to be anticipated from this problem. Factors affecting fretting, its effect on the fatigue strength of materials and methods of preventing it are discussed. The main theories that have been proposed to explain fretting corrosion and test methods that have been used to study it are reviewed. (Author).

Download or read book The Influence of Fretting on Fatigue written by W. J. Harris and published by . This book was released on 1967 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The intrusion of fretting fatigue in the field of flight structures has been responsible, in many cases, for the high strength reduction factors, of 10 or more, commonly encountered. Consequently, a primary objective of the report was to consider the evidence to support the claim that fretting must be ranked in importance with geometric stress concentration and the like, when considering the fatigue behaviour of structures. Thus, Mean Structures Curves, Crack Propagation And Non-Propagating Cracks and some Fundamental Fretting Fatigue Researches have been described and interpreted with the elucidation of the fretting fatigue mechanism in mind. A survey of certain Anti-Fret Techniques has been included not only to emphasize the gains to be made in terms of structural efficiency but to justify the main thesis that Primarily, the fretting fatigue mechanism is controlled by the stress fields generated by the contact of two surface topographies. (Author).

Download or read book Fretting Fatigue Initial Damage State to Cracking State written by DW. Hoeppner and published by . This book was released on 2003 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interrupted fretting fatigue experiments were performed to demonstrate the capabilities of a confocal microscope related to characterizing fretting damage and to correlate that damage with cycles to failure. Fretting damage was established at stepped down levels of 100% (baseline), 80%, 60%, 40%, 20%, and 10%. The damage levels were calculated as a percentage of the total cycles to fracture for the baseline fretting fatigue specimen. The baseline or 100% specimen was subjected to axial fatigue forces and normal forces to induce a fretting situation for 100% of its life or total cycles to fracture. The baseline specimen was cycled to fracture without interruption and experienced fretting due to normal forces throughout the experiment. Other specimens were subjected to cyclic forces for their respective percentage cycles under fretting fatigue conditions (i.e. with the applied normal force). After the prescribed number of cycles was attained each specimen was removed and inspected for fretting damage and characterized utilizing a confocal microscope and a scanning electron microscope. Each specimen was then cycled to fracture or run-out without the applied normal force. A damage threshold was demonstrated for fretting damage at 60% or less for these experimental conditions. Fretting was characterized as depth of damage (wear and/or pitting) and surface cracking. A key factor was the location of the fretting damage, not necessarily the magnitude of that damage. Fretting damage located near the edge of the fretting pad contact area was more detrimental than damage near the center of the fretted area.

Download or read book Methods of Analysis and Solutions of Crack Problems written by George C. Sih and published by Springer Science & Business Media. This book was released on 1973-01-31 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is weH known that the traditional failure criteria cannot adequately explain failures which occur at a nominal stress level considerably lower than the ultimate strength of the material. The current procedure for predicting the safe loads or safe useful life of a structural member has been evolved around the discipline oflinear fracture mechanics. This approach introduces the concept of a crack extension force which can be used to rank materials in some order of fracture resistance. The idea is to determine the largest crack that a material will tolerate without failure. Laboratory methods for characterizing the fracture toughness of many engineering materials are now available. While these test data are useful for providing some rough guidance in the choice of materials, it is not clear how they could be used in the design of a structure. The understanding of the relationship between laboratory tests and fracture design of structures is, to say the least, deficient. Fracture mechanics is presently at astandstill until the basic problems of scaling from laboratory models to fuH size structures and mixed mode crack propagation are resolved. The answers to these questions require some basic understanding ofthe theory and will not be found by testing more specimens. The current theory of fracture is inadequate for many reasons. First of aH it can only treat idealized problems where the applied load must be directed normal to the crack plane.

Download or read book Characterization of Fretting Fatigue Crack Initiation Processes in CR Ti 6Al 4V written by and published by . This book was released on 2003 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was conducted to quantify fretting fatigue damage and to evaluate the residual fatigue strength of specimens subjected to a range of fretting fatigue test conditions. Flat Ti-6Al-4V specimen were tested against flat Ti-6Al-4V fretting pads with blending radii at the edges of contact. Fretting fatigue damage for two combinations of static average clamping stress and applied axial stress was investigated for two percentages of total life. Accumulated damage was characterized using full field surface roughness evaluation and scanning electron microscopy (SEM). The effect of fretting fatigue on uniaxial fatigue strength was quantified by interrupting fretting fatigue tests: and conducting uniaxial residual fatigue strength tests at R = 0.5 at 300 Hz. Results from the residual fatigue strength tests were correlated with characterization results.

Download or read book The Theory of Critical Distances written by David Taylor and published by Elsevier. This book was released on 2010-07-07 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt: Critical distance methods are extremely useful for predicting fracture and fatigue in engineering components. They also represent an important development in the theory of fracture mechanics. Despite being in use for over fifty years in some fields, there has never been a book about these methods – until now. So why now? Because the increasing use of computer-aided stress analysis (by FEA and other techniques) has made these methods extremely easy to use in practical situations. This is turn has prompted researchers to re-examine the underlying theory with renewed interest. The Theory of Critical Distances begins with a general introduction to the phenomena of mechanical failure in materials: a basic understanding of solid mechanics and materials engineering is assumed, though appropriate introductory references are provided where necessary. After a simple explanation of how to use critical distance methods, and a more detailed exposition of the methods including their history and classification, the book continues by showing examples of how critical distance approaches can be applied to predict fracture and fatigue in different classes of materials. Subsequent chapters include some more complex theoretical areas, such as multiaxial loading and contact problems, and a range of practical examples using case studies of real engineering components taken from the author’s own consultancy work. The Theory of Critical Distances will be of interest to a range of readers, from academic researchers concerned with the theoretical basis of the subject, to industrial engineers who wish to incorporate the method into modern computer-aided design and analysis. Comprehensive collection of published data, plus new data from the author's own laboratories A simple 'how-to-do-it' exposition of the method, plus examples and case studies Detailed theoretical treatment Covers all classes of materials: metals, polymers, ceramics and composites Includes fracture, fatigue, fretting, size effects and multiaxial loading