Nonequilibrium Equation of State for Shock Compressed Particulate Composites

The dynamic compression of particulate composites results in long shock-fronts and transient states. The transient state of the material measured by particle velocity alone belies the complex nature of particle flow in a soft matrix. We will present the dynamic response of composites comprised of tungsten particles in a polymer matrix. The dynamic strength of the composite is not large enough to account for the transient response. Here we will discuss modifications of an equation of state accounting for particle size, volume fraction and properties of the polymer that capture observations in single and double-shock experiments.