摘要
随机振动载荷作用下结构的多轴疲劳分析非常复杂 ,利用VonMises应力准则将多轴应力响应转换为单轴应力是一条简单而有效的途径 ,其关键问题是VonMises应力概率密度函数的确定。本文提出了VonMises应力过程近似服从Weibull分布的假设 ,同时给出了确定Weibull参数的方法 。
Structure fatigue analysis under random multiaxial loadings is complicated. It is simple and efficient to convert multiaxial stress into uniaxial one with von Mises stress criterion. How to determine the probability density function (pdf) of von Mises stress is the key to this method. Assuming von Mises stress is a Weibull distribution process, this paper presents a way to determine the Weibull parameters, and creates favorable conditions for using von Mises stress to analyze structure multiaxial fatigue directly.
出处
《应用力学学报》
CAS
CSCD
北大核心
2004年第3期13-16,共4页
Chinese Journal of Applied Mechanics
