泡沫金属子弹撞击载荷下多孔金属夹芯板的动态响应

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (12) : 22-27.

论文

泡沫金属子弹撞击载荷下多孔金属夹芯板的动态响应

敬霖; 王志华; 宋延泽; 赵隆茂

作者信息 +

The dynamic response of cellular metallic sandwich panels subjected to metal foam projectile impact

Jing Lin; Wang Zhi-hua; Song Yan-ze; Zhao Long-mao

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文章历史 +

摘要

应用泡沫金属子弹撞击加载的方式研究了固支多孔金属夹芯板的塑性动力响应。讨论了多孔金属夹芯板在冲击载荷作用下的破坏模式。结果表明夹芯板的破坏主要表现在前面板的压痕与侵彻失效，芯层压缩和芯层剪切破坏。基于实验研究，应用LS-DYNA 3D非线性动力学有限元分析软件对夹芯板动力响应进行了有限元分析。数值研究结果与实验结果吻合较好。考察了加载冲量、面板厚度、芯层厚度及相对密度对多孔金属夹芯板抗撞击性能的影响。夹芯板的结构响应对其结构配置比较敏感，增加面板厚度或芯层厚度能够明显地减小后面板的挠度，提高夹芯板的抗撞击能力。研究结果对多孔金属夹芯板的优化设计具有一定得参考价值。

Abstract

The plastic dynamic response of clamped cellular metallic sandwich panels was investigated experimentally by using metal foam projectile. The deformation and failure modes of sandwich panels subjected to impact load are exhibited. Experimental results show that sandwich panels under impact loading can fail in several modes: indentation failure, penetration failure, core compression and core shear. Based on the experiments, corresponding finite element simulations have been undertaken using the LS-DYNA software. A good agreement has been obtained between the numerical and experimental results. The effects of face thickness, core thickness, relative density of core and applied impulse on the shock resistance of sandwich panels were studied. Structural response of sandwich panel is sensitive to its configuration and the permanent deflection of back face can be decrease by increasing face-sheet and core thickness. The experimental results are of worth to optimum design of cellular metallic sandwich structures.

导出引用

敬霖;王志华;宋延泽;赵隆茂. 泡沫金属子弹撞击载荷下多孔金属夹芯板的动态响应 [J]. 振动与冲击, 2011, 30(12): 22-27

Jing Lin;Wang Zhi-hua;Song Yan-ze;Zhao Long-mao. The dynamic response of cellular metallic sandwich panels subjected to metal foam projectile impact [J]. Journal of Vibration and Shock, 2011, 30(12): 22-27