An integrated Equation of State (EOS) and strength/pore-crush/damage model framework is provided for modeling near to source (near-field) ground-shock response, where large deformations and pressures necessitate coupling EOS with pressure-dependent plastic yield and damage. Nonlinear pressure-dependence of strength up to high-pressures is combined with a Modified Cam-Clay-like cap-plasticity model in a way to allow degradation of strength from pore-crush damage, what we call the "Yp-Cap" model. Nonlinear hardening under compaction allows modeling the crush-out of pores in combination with a fully saturated EOS, i.e., for modeling partially saturated ground-shock response, where air-filled voids crush. Attention is given to algorithmic clarity and efficiency of the provided model, and the model is employed in example numerical simulations, including finite element simulations of underground explosions to exemplify its robustness and utility.

翻译：摘要：本文提出了一种集成的状态方程（EOS）与强度/孔隙压碎/损伤模型框架，用于模拟近源（近场）地震冲击响应，其中大变形和高压力要求将状态方程与依赖于压力的塑性屈服和损伤相耦合。高强度下的非线性压力依赖性与类似修正剑桥黏土的帽盖塑性模型相结合，实现了孔隙压碎损伤导致的强度退化，我们称之为“Yp-Cap”模型。压实过程中的非线性硬化允许模拟孔隙压碎（与完全饱和状态方程相结合），即模拟部分饱和地震冲击响应（空气填充孔隙坍塌）。本文注重所提供模型的算法清晰性与效率，并将该模型应用于示例数值模拟中，包括地下爆炸的有限元模拟，以验证其鲁棒性和实用性。