OS0302 Development of Evaluation method of Fretting Fatigue Crack Initiation and Propagation Based on Local Stress at Contact Edge

Abstract

The ΔK value is calculated by using the local stress distribution at contact edge and 'intrinsic crack model'. Fretting fatigue initiation and limit is determined by theΔK_<eff, th> andΔK_<th> of the material. Fretting fatigue occur in compression stress field due to the surface pressure. However, ΔK_<th> in the compression stress field is unclear. Therefore Organize fretting fatigue data using this concept, to determine the mean stress effect of ΔK_<th>. By using this evaluation method, it was possible to estimate with an accuracy of ±20% for fretting fatigue limit.