Abstract
In order to investigate the effect of contact pad geometry on the fretting fatigue strength, the fretting fatigue tests and interrupted fretting fatigue tests were carried out for Ni-Cr-Mo steel. In this paper, the fretting fatigue test were conducted with; a stress ratio R=0.05,a contact pressure P=200 MPa and bridge pads leg height h=0.5,1.0 and 3.0 mm. The main features in this study are as follows : the fretting fatigue strength decreased with the increase in height of bridge pad legs because of the decreasing of frictional force, and the interrupted fretting fatigue tests showed that crack initiation behavior was affected by the bridge pad leg in the fretting fatigue.
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