【作者】 姚卫星； 郑立春；

【Author】 Yao Weixing Zheng Lichun Aircraft Department,Nan jing University of Aeromautics and Astronautics

【机构】 南京航空航天大学飞行器系；

【摘要】 本文指出了传统的局部应力应变法不适应子高周疲劳的原因,由此提出解决这一问题的方法：用等效应交一寿命曲线或四参数应交一寿命曲线替换 Manson-Cofftn 公式,用更合适的缺口疲劳系数或缺口场强度来描述缺口受载的严重程度．更多还原

【Abstract】 In this paper,the applicability of triditional local stress-strain approach for high fa- tigue life range is discussed,and it is found that Manson-Coffin formula dicribes the ε-N_f curve rather roughly and the point stress-strain at a notch root cannot indicates the stress field intensity because of stress gradient in high life range.Then some way to solve these problems are presented.更多还原