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, that is, 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.

中文翻译：

---

用于近场地面冲击的集成 EOS、孔隙破碎、强度和损伤模型框架

提供了一个集成的状态方程（EOS）和强度/孔隙破碎/损伤模型框架，用于模拟近源（近场）地面冲击响应，其中大变形和压力需要将 EOS 与压力相关的塑性屈服和损害。强度直至高压的非线性压力依赖性与改进的 Cam-Clay 类盖塑性模型相结合，允许因孔隙压碎损坏而导致强度下降，即我们所说的“Yp-Cap”模型。压实下的非线性硬化允许结合完全饱和的 EOS 来模拟孔隙的压碎，即用于模拟部分饱和的地面冲击响应，其中充满空气的空隙被压碎。所提供模型的算法清晰度和效率得到了关注，并且该模型被用于示例数值模拟，包括地下爆炸的有限元模拟，以例证其鲁棒性和实用性。