On the mechanics of fretting fatigue

Abstract The current state of knowledge of the prediction of fretting fatigue is reviewed and a summary given of the way fracture mechanics may be used to analyse a propagating crack. Recent experimental work on an aluminium alloy, HE15-TF, which discovered a distinct size effect (indicating that the absolute size of the contact has a marked effect on fatigue life), is reported and mechanical aspects of the problem, i.e. interfacial traction distribution, stress-state-induced and surface finish effects are discussed in depth. It is concluded that fretting fatigue is an initiation-controlled process and a tentative explanation of the size effect is proposed.

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