摘要
采用Green函数的方法,研究界面多个共线裂纹对SH波的散射问题.利用半空间水平面上任意一点的,承受时间谐和的,出平面线源载荷作用的位移函数;采用沿界面剖分的方法,构造界面多个共线裂纹的散射模型;并利用界面上的连续条件,建立待定外力系的定解积分方程组,进而求得裂纹尖端的动应力强度因子.讨论了界面两个共线裂纹与SH波的散射结果,给出了裂纹尖端动应力强度因子随介质参数变化的分布规律.
The scattering of SH-wave by interface multiple co-linear cracks is studied with Green's function. In order to solve the problem, by way of the 'cutting', a suitable scattering-model is constructed, giving the solution of displacement fields for half space under output-plane harmonic line loading at horizontal surface. With the use of the interface's continuity, the integral equation for determining the external forces can be changed into algebraic equations and solved numerically, so that the crack dynamic stress intensity factors can be determined. As an example, the scattering of SH-wave from only two interface co-linear cracks is discussed. The distributed regularities of the crack DSIF are determined when the medium parameters are altered.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2004年第9期757-761,共5页
Transactions of Beijing Institute of Technology
关键词
GREEN函数
剪切平面波散射
积分方程
动应力强度因子
Green function
scattering of SH-wave
integral equation
dynamic stress intensity factor(DSIF)
