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 vi
... Tests 7.1 Introduction . 7.2 Bridge - type tests 8888 89 95 95 99 100 105 110 111 113 122 • 127 127 134 143 149 153 153 154 7.3 Test geometry - the avoidance of singularities . 7.4 Fretting tests based on the Hertzian contact 158 162 ...
... Tests 7.1 Introduction . 7.2 Bridge - type tests 8888 89 95 95 99 100 105 110 111 113 122 • 127 127 134 143 149 153 153 154 7.3 Test geometry - the avoidance of singularities . 7.4 Fretting tests based on the Hertzian contact 158 162 ...
Seite ix
... test of time , we have also included new material which is still being developed . We are at present delving ever more deeply into a quantitative explanation of crack initiation and we expect that this will be the most fruitful area of ...
... test of time , we have also included new material which is still being developed . We are at present delving ever more deeply into a quantitative explanation of crack initiation and we expect that this will be the most fruitful area of ...
Seite 2
... test machine . The fluctuating loads present elsewhere in the test caused very small axial relative displacements under radial load , and , after several millions of cycles of load , produced the damage depicted . In this instance ...
... test machine . The fluctuating loads present elsewhere in the test caused very small axial relative displacements under radial load , and , after several millions of cycles of load , produced the damage depicted . In this instance ...
Seite 3
... tests , Warlow- Davies imposed fretting damage first and subsequently conducted fatigue tests ; it was left to McDowell ( 1953 ) to carry out simultaneous fretting fatigue tests , and subse- quent pioneering work was conducted by Fenner ...
... tests , Warlow- Davies imposed fretting damage first and subsequently conducted fatigue tests ; it was left to McDowell ( 1953 ) to carry out simultaneous fretting fatigue tests , and subse- quent pioneering work was conducted by Fenner ...
Seite 5
... tests available will be given in Chapter 7 . There are certain characteristics which appear to be common to the cracks gener- ated by a wide range of fretting geometries . First , cracks invariably nucleate at the edge of the contact ...
... tests available will be given in Chapter 7 . There are certain characteristics which appear to be common to the cracks gener- ated by a wide range of fretting geometries . First , cracks invariably nucleate at the edge of the contact ...
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