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An integrated Equation of State (EOS) and strength/pore-crush/damage modelframework is provided for modeling near to source (near-field) ground-shockresponse, where large deformations and pressures necessitate coupling EOS withpressure-dependent plastic yield and damage. Nonlinear pressure-dependence ofstrength up to high-pressures is combined with a Modified Cam-Clay-likecap-plasticity model in a way to allow degradation of strength from pore-crushdamage, what we call the ``Yp-Cap'' model. Nonlinear hardening under compactionallows modeling the crush-out of pores in combination with a fully saturatedEOS, i.e., for modeling partially saturated ground-shock response, whereair-filled voids crush. Attention is given to algorithmic clarity andefficiency of the provided model, and the model is employed in examplenumerical simulations, including finite element simulations of undergroundexplosions to exemplify its robustness and utility.

An integrated EOS, pore-crush, strength and damage model framework for near-field ground-shock