Evolution of Plastic Strain in Steady, Plastic Shock Waves

摘要

This study is a brief summary of some recent efforts to understand the constitutive implications of empirical relations like the following: P/sub D/ = k times the absolute value of (d epsilon/sub m/dt)/sup 1/4/, where P/sub D/ is the impact needed to create a plastic shock wave, k is a material constant, and d epsilon/sub M//dt /sup 1/4/ is the peak strain rate in that wave. This is in the context of viscoplasticity theories that introduce an internal state variable for the plastic strain and a companion rate law for its evolution. 5 refs., 1 fig. (ERA citation 13:001206)