Mechanics of Fretting FatigueFailures 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. |
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... 4.3 Twisting contacts 78 4.4 Numerical methods: homogeneous bodies 82 4.4.1 Numerical solution of integral equations 83 4.4.2 Influence function methods 85 4.4.3 Other techniques 88 4.5 Numerical methods: layered problems 89 v.
... 4.3 Twisting contacts 78 4.4 Numerical methods: homogeneous bodies 82 4.4.1 Numerical solution of integral equations 83 4.4.2 Influence function methods 85 4.4.3 Other techniques 88 4.5 Numerical methods: layered problems 89 v.
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D.A. Hills, D. Nowell. 4.4.3 Other techniques 88 4.5 Numerical methods: layered problems 89 5 Mechanics of Surfaces 95 5.1 Introduction 95 5.2 Contact of rough surfaces 99 5.2.1 Regular roughness 100 5.2.2 Random rough surfaces 105 5.2.3 ...
D.A. Hills, D. Nowell. 4.4.3 Other techniques 88 4.5 Numerical methods: layered problems 89 5 Mechanics of Surfaces 95 5.1 Introduction 95 5.2 Contact of rough surfaces 99 5.2.1 Regular roughness 100 5.2.2 Random rough surfaces 105 5.2.3 ...
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Contents
Basic Contact Mechanics | 9 |
Contacts under Partial Slip | 41 |
Advanced Contact Mechanics | 65 |
Mechanics of Surfaces | 95 |
The Analysis of Cracks | 127 |
Fretting Fatigue Tests | 153 |
Analysis of crack propagation | 169 |
Analysis of crack initiation | 195 |
Conclusions | 215 |
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Common terms and phrases
amplitude analysis applied approach arise asperity bodies boundary bulk calculated cause Chapter closed coefficient of friction complete components configuration consider constant contact pressure crack growth crack initiation crack tip cycle damage described determine developed direction discussed dislocation displacement distribution edge effect elastic element employed equation example experience experimental faces Figure finite force fracture fretting fatigue friction function further geometry give given grow hence Hertzian Hills important increased influence integral ISBN length limiting loading material means measure mechanics method mode normal Nowell obtained occurs parameter particular plane plasticity possible practice predict present problem produce propagation range region relative residual stress rough scale shear tractions shown in fig shows similar singular sliding slip solution specimen stick zone strain stress field stress intensity factor surface takes tangential technique tension tests traction distribution zero zone
Popular passages
Page 223 - Bueckner, HF: The Propagation of Cracks and the Energy of Elastic Deformation.
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