A model, applicable at high-strain rate, is presented for the shear modulus and yield strength as functions of equivalent plastic strain, pressure, and internal energy (temperature). The parameters needed to implement the model have been determined for 14 metals. Using this model, hydrodynamic computer simulations have been successful in reproducing measured stress and free-surface-velocity-vs-time data for a number of shock-wave experiments.
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An experimental procedure originally proposed by G. I. Taylor to determine the dynamic yield point of metals is studied, using high-speed computer simulations. A simple method is outlined for determining the yield strength of materials that can be described by elastic-plastic theory. Results for several metals are presented.
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