The Lower Half Of The Debonding Circular Lining In Two-phase Media Of SH Wave Scattering Problem

Two aspects of the problem are studied by the theory that the Green function methodcombined with complex variable method in this paper,that the scattering problem of SHwaves by interface circular elastic lining debonding on the bottom half，the scattering problemof SH waves by interface circular elastic lining debonding on the bottom half and interfacecrack interaction.Scattering problem of SH waves by interface circular elastic lining debonding on thebottom half is studied.Firstly,it divided the whole model into the bottom half elastic spacewith canyon and upper half elastic space with semi-circular lining.Then construct the Greenfunction of the elastic half space respectively,using the thought of“conjunction”add themtogether,then the definite integral equations of solving problem will be received according tothe continuous condition of the displacement and stress on the conjunction surface,Finally,thesolution of dynamic stress concentration factor is determined and the influences of differentmedium parameters on dynamic stress concentration factor is discussed through the examples.The scattering problem of SH waves by interface circular circular elastic liningdebonding on the bottom half and interface crack interaction is studied.Firstly,using themethod of artificial division to division the interface crack,then the definite integral equationsof solving dynamic stress intensity factor will be received according to the continuouscondition of the displacement and stress on the conjunction surface and the Green function,theinfluences of different medium parameters on dynamic stress intensity factor is discussedthrough the examples.