Abstract
The effect of contact pad geometry on fretting fatigue behavior of high strength steel was examined by using the clamping double bridge pads system. In order to investigate the effects of bridge pad shapes, the fretting fatigue tests were carried out by using four kinds of bridge pad with different leg height h. As a result, the fretting fatigue strength was only 27%〜37% of the plain fatigue strength, and the fretting fatigue strength decreased with decreasing in the h. The contact stress distribution was measured by strain gauge and calculated by using a finite element method in order to investigate the effect of different leg height h of the bridge pad on the contact condition. When the maximum stress amplitude was loaded to the specimen, the contact stress was the maximum in the inside edge on the contact surface, and the contact stress decreased to the outside edge.
