Reliability Research on the Fatigue Fracture Behavior in Very High Cycle Region

摘要：

In order to make the reliability research oftbe fatigue fracture behavior in very high cycle region, the very high cycle fatigue S-Ntest data of G-Cr15 bearing steel arc estimated accurately. Its S-N curve relation is described by the Bansqun model and its probabilistic S-N curve model is created. The method of statistics of extreme values (SEV) and Murakami equation are adopted to estimate the size of maximum inclusion and the corresponding fatigue strength of GCr15 bearing steel respectively. Test results show that the very high cycle fatigue S-N test data can follow the three parameters Weibull distribution better. Their probabilistic S-N curves shape all exhibit continual descending trend. Based on the maximum inclusion size can follow the Gumbel distribution better, the size of maximum inclusion predicted by the SEV exhibit linear ascending trendalong with the augment oftbe volume of the steel. The result predicted by the Murakami equation explains the reason of probabilistic S-N curve shape exhibiting continual descending trend.

关键词： very high cycle fatigue S-N curve P-S-N curve SEV theory Murakami equation

作者: LI Wei LI Qiang WANG Binjie WANG Ping

作者单位: Laboratory for Structural Strength Testing (Beijing Jiaotong University),China National Accreditatio Institute of Oceanographic Instrumentation,Shandong Academy of Sciences,Qingdao 266001,Shandong,Chin

会议类型: 国际会议

会议名称: The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)

会议地点: 北京

会议语种:英文

页码: 1858-1863

在线出版日期: 2008-09-24（万方平台首次上网日期，不代表论文的发表时间）