Mechanics of Fretting FatigueSpringer Science & Business Media, 09.03.2013 - 246 Seiten 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. |
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Seite vii
D.A. Hills, D. Nowell. 10 Conclusions 215 Appendix A - Kernels for a dislocation in a half - plane 219 References 221 Index 233 Preface Failures of many mechanical components in service result from CONTENTS vii.
D.A. Hills, D. Nowell. 10 Conclusions 215 Appendix A - Kernels for a dislocation in a half - plane 219 References 221 Index 233 Preface Failures of many mechanical components in service result from CONTENTS vii.
Seite 10
... half - plane , ( a ) ( b ) P P ( c. Figure 2.1 : Typical pipework arrangement showing a number of bolted flange joints . Singular , N = Non - singular. 10 CHAPTER 2. BASIC CONTACT MECHANICS.
... half - plane , ( a ) ( b ) P P ( c. Figure 2.1 : Typical pipework arrangement showing a number of bolted flange joints . Singular , N = Non - singular. 10 CHAPTER 2. BASIC CONTACT MECHANICS.
Seite 11
... half - plane is not continuous there , and the corresponding contact pressure is singular . A minor manufacturing ... half - width , a , will be much less than the character- istic radius of the cylinder , R. Under these circumstances ...
... half - plane is not continuous there , and the corresponding contact pressure is singular . A minor manufacturing ... half - width , a , will be much less than the character- istic radius of the cylinder , R. Under these circumstances ...
Seite 12
... half - plane . This is known as a conformal contact , and in order to solve the problem we must use a formulation appropriate to a disk and an infinite plane containing a hole , which is a much more difficult problem , though solu ...
... half - plane . This is known as a conformal contact , and in order to solve the problem we must use a formulation appropriate to a disk and an infinite plane containing a hole , which is a much more difficult problem , though solu ...
Seite 15
... half - plane subject to line normal and tangential forces . Figure 2.4 shows a half - plane subject to a line force having normal and tangential components P , Q per unit length respectively . It is assumed that the half - plane is in a ...
... half - plane subject to line normal and tangential forces . Figure 2.4 shows a half - plane subject to a line force having normal and tangential components P , Q per unit length respectively . It is assumed that the half - plane is in a ...
Inhalt
5 | |
Contact of spheres the Hertz problem | 31 |
149 | 37 |
Contacts under Partial Slip | 41 |
Advanced Contact Mechanics | 65 |
9 | 101 |
26 | 108 |
41 | 115 |
60 | 149 |
1 | 169 |
Analysis of crack propagation | 175 |
Analysis of crack initiation | 199 |
Conclusions | 215 |
78 | 226 |
83 | 233 |
210 | 235 |
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Häufige Begriffe und Wortgruppen
applied arise asperity contact axi-symmetric behaviour bulk stress bulk tension Chapter coefficient of friction Comninou component compressive configuration constant contact patch contact problems contacting bodies crack faces crack initiation crack length crack propagation crack tip cyclic cylinders Dundurs effect elastically similar experimental Figure finite element finite element method fracture mechanics fretting fatigue fretting fatigue cracks fretting problems geometry given Green's functions half-plane hence Hertzian contact integral equation material Mech Mindlin mode normal load obtained occurs parameter partial slip plain fatigue plane plane strain plasticity possible predict region relative displacement relative slip residual stress shear force shear stress shear traction distribution shear tractions shown in fig singular sliding slip amplitude slip zones solution specimen spheres stick zone strain stress intensity factor surface displacements tangential displacement tangential force tangential loading technique tensile tests zero