Study on Fretting Fatigue Crack Propagation Condition at Edge and Center of Contact Part

Abstract

Using an equipment which could apply arbitrary relative slip, fretting fatigue tests were performed in order to clarify the reason why the location of fretting fatigue crack changes depending on relative slip amount. The influence of the location of cracking on fatigue limit was also investigated. When relative slip amount was less than 5μm, cracks were observed in both edge and center of contact part. Fracture positions changed depending on the relative slip amount, but fatigue limit was not affected. In order to explain these behaviors, it is necessary to clarify the local condition of each cracking site.