摘要
采用复变函数和Green函数方法求解具有任意有限长度的椭圆孔边上的径向裂纹对SH波的散射和裂纹尖端处的动应力强度因子· 取含有半椭圆缺口的弹性半空间水平表面上任意一点承受时间谐和的出平面线源荷载作用时的位移解作为Green函数,采用裂纹"切割"方法,并根据连续条件建立起问题的定解积分方程。
The method of complex function and the method of (Green's) function are used to investigate the problem of SH-wave scattering by radial cracks of any limited length along the radius originating at the boundary of an elliptical hole, and the solution of dynamic stress intensity factor at the crack tip was given. A (Green's) function was constructed for the problem, which is a basic solution of displacement field for an elastic half space containing a half elliptical gap impacted by anti-plane harmonic linear source force at any point of its horizontal boundary. With division of a crack technique, a series of integral equations can be established on the conditions of continuity and the solution of dynamic stress intensity factor can be obtained. The influence of an elliptical hole on the dynamic stress intensity factor at the crack tip was discussed.
出处
《应用数学和力学》
EI
CSCD
北大核心
2004年第9期958-966,共9页
Applied Mathematics and Mechanics
基金
国家自然科学基金资助项目(59578003)
关键词
孔边裂纹
SH波散射
GREEN函数
动应力强度因子(DSIF)
复变函数
积分方程
crack originating at elliptical hole
SH-wave scattering
(Green's) function
dynamic stress intensity factor (DSIF)
complex function
integral equation
