This paper presents numerical and analytical studies of the response of a sacrificial cladding structure with an Alporas aluminum foam core and a thick mild steel cover and rear plates under blast loading. A suitable numerical model in LS-DYNA based on the coupled Load Blast Enhanced/Multi-Material Arbitrary Lagrangian–Eulerian (LBE/MM-ALE) methods is selected and validated using the experimental data available in the literature. The shock front propagation and micro-inertia effects are responsible for the strength enhancement predicted in the virtual blast test. Two models with different decaying blast loading functions are examined to study the fluid–structure interaction (FSI) effect. The simulation results show that the FSI effect is negligible if the foam core is strain-rate insensitive. Further investigations should be conducted with analytical models if the core material of the sacrificial cladding structures exhibits a strong strain-rate effect (for example, Alporas foam).

中文翻译：

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Alporas 铝泡沫芯牺牲包层结构在爆炸荷载作用下的冲击响应

本文介绍了具有 Alporas 泡沫铝芯和厚低碳钢盖板和后板的牺牲包层结构在爆炸载荷下的响应的数值和分析研究。使用文献中可用的实验数据选择并验证了基于耦合载荷冲击增强/多材料任意拉格朗日-欧拉 (LBE/MM-ALE) 方法的 LS-DYNA 中合适的数值模型。冲击波前传播和微惯性效应是虚拟爆炸试验中预测的强度增强的原因。研究了两种具有不同衰减爆炸载荷函数的模型，以研究流固耦合 (FSI) 效应。模拟结果表明，如果泡沫芯对应变率不敏感，则 FSI 效应可以忽略不计。