基于高应力区对临界距离理论的修正

来源 :第十九届全国疲劳与断裂学术会议 | 被引量 : 0次 | 上传用户：zhongsichuang

【摘要】

：

基于Kuguel 提出的高应力区(HSV)的概念，本文提出了一种修正的临界距离法，该方法能将临界距离法(TCD)的适用范围从高周疲劳推广到中低周疲劳.HSV 的疲劳失效机理为应力较高区域内的点对疲劳裂纹萌生贡献更多的可能性.当缺口附近区域内的应力超过临界应力时，则认为该区域为疲劳损伤区域.通过对SAE1045 进行疲劳极限实验，来验证该方法的准确性.

【作者】

：

罗鹏姚卫星

【机构】

：

南京航空航天大学飞行器先进设计技术国防重点学科实验室,南京 210016 南京航空航天大学机械结构

【出处】

：

第十九届全国疲劳与断裂学术会议

【发表日期】

：

2018年10期

【关键词】

：

临界距离法疲劳损伤区域高应力区

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