接触端部応力に着目したフレッティング疲労き裂発生条件の検討

抄録

It is know that the fretting fatigue limit is affected by various factors such as contact pressure, relative slip, contact length, specimen size and so on. In this study, the reason why these factors affect the fretting fatigue was investigated based on the stress distribution near the contact edge. A measuring technique of local stress distribution near the contact edge was developed using a small stress concentration gage. It was shown that stress concentration occurred at the contact edge by the fretting process depending on these factors. It was found that the peak stress amplitude at the contact edge was the unified factor which governs the fretting fatigue limit.