介质中夹塞物界面处的SH波散射与动应力集中

Scattering of SH-wave and dynamic stress concentration in elastic medium with a cylindrical inclusion

基于弹性动力学理论,分析弹性介质中夹塞物界面处SH波的散射及动应力集中问题,给出结构各区域弹性波分析解的表达式;根据位移与应力在界面处的连续条件,确定弹性波模式系数,推导环向和径向动应力集中系数的一般表达式;分析了材料性质对界面动力特性的影响.算例中,给出不同参数下,夹塞物附近动应力集中系数的数值结果,并进行了分析讨论.

Based on the theory of elastic dynamics,scattering of SH-wave and dynamic stress concentration in elastic medium with a cylindrical inclusion are studied.The formulations of analytical solutions of elastic waves in different structural regions are presented.By means of the continuous conditions of displacement and stress in the interface,unknown mode coefficients of elastic waves are determined.The general equations of circumferential and radial dynamic stress concentration factors are derived and the influences of material character on dynamic behavior in the interface are analyzed.As an example,dynamic stress concentration factors under different structural parameters are calculated and discussed.