Abstract In this study, the deformation and damage behaviors of sandwich plates with composite foam core subjected to high velocity impact of metallic foam projectile are investigated. A series of experiments was conducted to address the dynamic response, failure modes and energy absorption characteristics of the sandwich plates with different configurations. The dynamic behavior of the sandwich plates was analyzed by using 3D-DIC technique with high speed cameras. The failure modes of the sandwich plates as well as front face sheet, foam core and rear face sheet were identified and discussed. The results indicate that the symmetric deformation of rear face sheet increased with the impact loading increasing, and the core with greater thickness lengthen the responding time of the structures effectively. Compared with the thickness of core, core density played the more important role on improving the impact resistance of the sandwich plates at same areal mass. The effect of sequence of core layers on the impact resistance can be neglected in this study. Additionally, the energy absorption analysis of the six different configurations exhibited that the plates with high density core provided more stable and superior energy absorption efficiency. The study could provide a valuable reference for designing more efficient light weight protective structures.

中文翻译：

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PVC泡沫芯金属夹层结构的高速冲击响应

摘要 研究了泡沫复合材料夹芯板在泡沫金属弹丸高速冲击下的变形和损伤行为。进行了一系列实验以解决具有不同配置的夹层板的动态响应、失效模式和能量吸收特性。夹层板的动态行为通过使用高速相机的 3D-DIC 技术进行分析。识别和讨论了夹层板以及前面板、泡沫芯和后面板的失效模式。结果表明，后面板的对称变形随着冲击载荷的增加而增加，厚度越大的芯材有效地延长了结构的响应时间。与磁芯厚度相比，在相同面积质量下，芯密度对提高夹层板的抗冲击性起到更重要的作用。在本研究中可以忽略芯层顺序对抗冲击性的影响。此外，六种不同配置的能量吸收分析表明，高密度芯板提供了更稳定和卓越的能量吸收效率。该研究可为设计更高效的轻型防护结构提供有价值的参考。六种不同配置的能量吸收分析表明，高密度芯板提供了更稳定和更优越的能量吸收效率。该研究可为设计更高效的轻型防护结构提供有价值的参考。六种不同配置的能量吸收分析表明，高密度芯板提供了更稳定和更优越的能量吸收效率。该研究可为设计更高效的轻型防护结构提供有价值的参考。