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：本文提出了一种集成的状态方程与强度/孔隙压碎/损伤模型框架，用于模拟近源（近场）地面冲击响应。在大变形与高压条件下，必须将状态方程与压力依赖的塑性屈服及损伤相耦合。通过将高压力范围内的非线性压力依赖强度与修正的坎-克莱型帽塑性模型相结合，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结合完全饱和状态方程模拟孔隙压碎过程，即用于模拟部分饱和介质中空气填充孔隙压碎的地面冲击响应。本研究特别关注所提供模型的算法清晰性与计算效率，并通过实例数值模拟（包括地下爆炸的有限元模拟）展示了该模型的鲁棒性和实用性。