摘要
本文应用随机有限元法分析裂纹尺寸和材料弹性常数的随机性对应力强度因子以及疲劳裂纹扩展的影响。文中利用一类杂交的奇异单元来考察裂纹长度和材料参数不确定时应力强度因子的均值和方差，并进一步分析了疲劳裂纹随机扩展的均值和变差系数曲线，最后通过数例检验了方法的有效性。
In this paper the Stochastic finite element method is applied to analyze the influence of uncertain crack length and material properties on crack-tip stress intenSity factor and fatigue crack growth.A hybrid singular element is introduced bile fly,and then the means and variances of stress intensty factor,fatigue crack groWth rate and number of stress cycles are formulated.Some examples are calculated to illustrate the effeCtiveness of the present method.
基金
国家自然科学基金
关键词
随机有限元法
应力强度因子
断裂力学
概率
stochastic finite element method
stress intensity factor
fatigue crack growth
