WIT Press


The Effect Of Local Loads On Fatigue Crack Growth

Price

Free (open access)

Paper DOI

10.2495/LD960101

Volume

13

Pages

15

Published

1996

Size

893 kb

Author(s)

D.R Rooke

Abstract

Crack growth is usually dominated by the remote boundary loads on the cracked body. However when cracks are small, local loads can have a sub- stantial effect on the crack growth behaviour. These local loads often arise due to fretting, that is the rubbing together of surfaces. If frictional forces are present, then non-linear effects must be taken into account. In general fatigue crack growth is determined by AJf (the range of the stress inten- sity factor) and E (the ratio of minimum 7f to maximum #). This paper demonstrates, for a simple model, the effects on both A# and A caused by localized fretting forces. 1 Introduction It is well-established that fatigue crack growth is controlled by the stress Held in the vicinity of the crack tip; a Reid which is characterized by the stress intensity factor. It was shown by Paris[1] that the prime controlling parameter is the cyclic range of the str

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