Approximate Calculations of Shock Adiabats for Porous Materials

In this paper, it is assumed that the linear relationship of shock adiabat, D=a+bu is valid for dense materials having different specific internal energies at zero-pressure. On the basis of this assumption and by using the thermal expansion relation at normal pressure, equations for calculating shock adiabats and isentropic for porous materials are derived. The calculated shock adiabats for porous aluminum, copper, and iron, are in accord with the measured data given in Ref. [1].