Simple estimation method of fretting fatigue limit considering wear process

Abstract

Fretting fatigue process have many features such as early stage crack initiation at contact edge, very slow crack propagation and fatigue failure after very long life operation of machinery. In previous paper [1,2,3] we present fretting fatigue process model and fretting strength and life estimation using fracture mechanics and wear process approaches. But, the estimation of fretting wear process require a large amount of labor, so this precise wear estimation method is not suitable for actual design site. In this paper we try to present simple fretting fatigue limit estimation method based on the assumption that in the final stage of wear process the contact pressure distributions near contact edges converge to a uniform. And the validity of this estimated result can be confirmed by comparing with experimental results.