摘要
本文提出了采用一个随机变量描述疲劳裂纹扩展统计不确定性方法,并且通过极大似然方法和二阶矩方法进行疲劳可靠性分析。通过21个紧凑拉伸试件的疲劳试验,表明本文提出的方法满足工程中疲劳可靠性评估精度的要求。
Based on a maximum likelihood method and a second moment approximation, a new method for fatigue reliability analysis is presented. Taken as a random variable, the crack growth rate is introduced into the Paris law. The deterministic differential equation for the crack growth rate is solved, assuming that the parameter in this equation is a random variable. The comparison with available experimental data indicates that the proposed method is reliable and applicable to the estimation of reliability of the crack growth behavior.
出处
《工程力学》
EI
CSCD
北大核心
2002年第2期115-118,共4页
Engineering Mechanics
基金
国家重点基础研究项目(G1999065010)的资助(973项目)
