Simultaneous Evaluation of Dynamic Strength and Equation of State

Numerical simulations predict material response in shock wave loading events. The deformation response within these simulations is defined by constitutive models, such as the equation of state (EOS) and dynamic strength, which are typically sets of equations calibrated to experimental data. Traditionally, the EOS and dynamic strength of materials are characterized through separate experiments, such as uniaxial-strain for EOS and pressure-shear experiments for strength. Recent work has used tamped RMI experiments to calibrate the dynamic strength of a material. This study presents a method to simultaneously characterize the EOS and dynamic strength of a material using tamped RMI experiments, eliminating the need for separate experiments. It was applied to a composite formed by adding aluminum oxide particles to Epon 828 epoxy at 27% and 43% volumetric loading. The dynamic behavior was analyzed to understand the effect of aluminum oxide loading on the overall bulk material response.