The model of iron properties for plate impact and explosive compression simulations

Abstract

Abstract The material model of iron and steel is developed for fluid dynamics simulations of samples under extreme loading induced by an impact or explosion. The model is validated on a set of plate impact tests using the contact smoothed particles hydrodynamics method. The model takes into account the polymorphic α–ε phase transition in iron which is shown to be correctly reproduced, including the hysteresis effect at unloading. The equation of state for steel is shown to be very close to that of iron on a set of tests with spherical shells under explosive compression; however the yield strength of steel is greater.