A physical model of the structure and attenuation of shock waves in metals

摘要: In this paper, a physical model of the structure and attenuation shock waves in metals is presented. order to establish constitutive equations materials under high velocity deformation study transition zone wave, two independent approaches are involved. Firstly, specific internal energy decomposed into elastic compression energy, later represented by an expansion third-order terms strain entropy, including coupling effect heat mechanical energy. Secondly, plastic relaxation function describing behaviour flow temperature pressure suggested from viewpoint dislocation dynamics. addition, group ordinary differential has been built determine thermo-mechanical state variables steady wave thickness analytical solution can be found provided that entropy change across assumed negligible Hugoniot modulus used instead isentropic modulus. A quite approximate method for solving front proposed flat-plate symmetric impact problem.