主催: 一般社団法人 日本機械学会
会議名: 2018年度 年次大会
開催日: 2018/09/09 - 2018/09/12
In order to improve an appreciable degradation of lifetime in cyclic fatigue the methods adding pre-load before cycling loading were suggested. Test results showed that by the fatigue lifetime could be clearly increased by adding a pre-loading stress more than cyclic loading stress. It was supposed that the process zone formed ahead of crack tip by pre-loading suppressed the occurrence of micro-cracks and the process zone wake extended behind crack tip caused the increases of resistance on crack extension.