Extension of the Wu–Jing equation of state for highly porous materials: Calculations to validate and compare the thermoelectron model

In order to verify and validate the newly developed thermoelectron equation of state (EOS) model that is based on the Wu–Jing EOS [J. Appl. Phys. 80, 4343 (1996); Appl. Phys. Lett. 67, 49 (1995)], calculations of shock compression behavior have been made on five different porous metals: iron, copper, lead, tungsten, and aluminum which are commonly used as standards. The model was used to calculate the Hugoniot, shock temperature, sound velocity, and unloading isentrope for these materials and comparisons were made to previous calculations and available data. Based on these comparisons, it is felt that the model provides information in good agreement with the corresponding experimental and theoretical data published previously. This suggests that the new model can satisfactorily describe the properties of shocked porous materials over a wide range of pressure and porosity. © 2002 American Institute of Physics.