LAUSR

Abstract The dynamic growth of void in an infinite elastic-viscoplastic medium under thermal shock is analyzed theoretically. The technique of direct integration is presented to obtain the analytic solutions of stress and displacement. The initial purely elastic deformation before the viscoplastic deformation is considered. Especially, the nonlinear ODE for moving interface of the elastic and viscoplastic zone is derived from the interface conditions. The dynamic evolution of void growth is different from the static case, since the moving interface leads to the intrinsic nonlinearity. The numerical results indicate that the effect of viscosity has significant influence on void growth.