A statistical analytical method for fatigue reliability containing very-high-cycle fatigue regime

摘要：

　　Fatigue tests usually cost a lot of time and expenses especially for very-high-cycle fatigue (VHCF).Hence,a convenient and fast method is necessary for obtaining the S-N curve under different probabilities (i.e.P-S-N curve) s that to give an entire trend of the fatigue property of metallic materials under different stress levels.In this paper,a method is proposed to estimate the P-S-N curve containing VHCF regime.With the method,the fatigue life under different stress levels is first transferred to the fatigue life under an arbitrary stress level.Then,the P-S-N curve is obtained by studying the fatigue life in logarithm of base 10 under the chosen stress level.The method is used to study the reliability of fatigue life of steels and aluminium alloys,and the results are in agreement with the experimental data.The distribution form of fatigue life under the same stress level is also examined for VHCF regime.It is indicated that,for VHCF regime,the fatigue life under the same stress level approximately follows the normal distribution in logarithm of base 10.

关键词： very-high-cycle fatigue fatigue life reliability P-S-N curve

作者: C.Q.Sun X.L.Zhang J.J.Xie Y.S.Hong

作者单位: State Key Laboratory of Nonlinear Mechanics,Institute of Mechanics,Chinese Academy of Sciences,Beiji School of Materials Science & Engineering,Beijing Institute of Technology

会议类型: 国际会议

会议名称: International Conference on Airworthiness & Fatigue -7th ICSAELS Series Conference(大飞机安全性能与疲劳国际会议)

会议地点: 北京

会议语种:英文

页码: 91-94

在线出版日期: 2013-03-24（万方平台首次上网日期，不代表论文的发表时间）