STOCHASTIC PROPAGATION OF SEMI-ELLIPTICAL SURFACE CRACK

被引：0
|
作者：
Zhu Weiqiu Jiang Mingxiao (Department of Mechanics
机构：
来源：
Acta Mechanica Solida Sinica | 1995年 / 03期
关键词：
fatigue crack growth; semi-elliptical surface crack; fatigue life; reliability; stochastic averaging;
D O I：
暂无
中图分类号：
TB301 [工程材料力学（材料强弱学）];
学科分类号：
0801 ; 080104 ;
摘要：
The semi-elliptical surface crack growth of structural components withuncertain material resistance under random loading is studied by using the stochasticaveraging principle.The FPK equation governing the transition probability densityfunction of crack lengths is derived.The analytical solution of the FPK equation forthe case of that the equations for the crack growth in the surface and depth directionsare uncoupled is obtained.The effects of the parameters of the stress process and of thematerial property on the behavior of semi-elliptical fatigue crack growth of thecomponents with deterministic resistance to crack growth in the stationary Gaussianstress process are examined.The comparison of the analytical result with digitalsimulation shows the effectiveness of the present method.
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页码：236 / 244
页数：9
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