Effect of Contiguity of Contact Edges on Fretting Fatigue Strength

Abstract

Fretting fatigue strength with contiguous contact edges are analyzed using fracture mechanics. Stress intensity factors of fretting cracks are calculated using stress distributions near the crack tip. Crack propagation and arrest behaviors are estimated using threshold stress intensity factor range ΔK_<th>. AS a results it was clarified that the fretting fatigue limit decrease about 40 or 50% by the contiguity of the contact edges.