Abstract The dynamic response of foam concrete under low-velocity impact has been studied through impact tests of cubes and buffer layers. The impact response of foam concrete consisted of three stages. Foam concrete showed slight strain rate effect and confining pressure could significantly increase the plateau impact force. The laying of buffer layer obviously reduced the maximum impact force during impact (96% reduction was observed at 4.43 m/s). Smooth particle hydrodynamics (SPH) models based on impact tests of buffer layer were established, which simulated the test process reasonably well. The influence of impact velocity and thickness on maximum impact force was revealed and the critical thickness was obtained by means of the densification strain. Finally, the mechanism of impact damage was investigated and the characteristic of layer-by-layer damage of foam concrete was revealed.

中文翻译：

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泡沫混凝土在低速冲击下的动力响应：实验与数值模拟

摘要 通过立方体和缓冲层的冲击试验研究了泡沫混凝土在低速冲击下的动力响应。泡沫混凝土的冲击响应由三个阶段组成。泡沫混凝土表现出轻微的应变率效应，围压可显着增加高原冲击力。缓冲层的铺设明显降低了冲击过程中的最大冲击力（在 4.43 m/s 时观察到减少了 96%）。建立了基于缓冲层冲击试验的光滑粒子流体动力学（SPH）模型，较好地模拟了试验过程。揭示了冲击速度和厚度对最大冲击力的影响，并通过致密化应变获得了临界厚度。最后，