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首页> 外文期刊>Computer Modeling in Engineering & Sciences >Numerical Investigation on Dynamical Response of Aluminum Foam Subject to Hypervelocity Impact With Material Point Method
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Numerical Investigation on Dynamical Response of Aluminum Foam Subject to Hypervelocity Impact With Material Point Method

机译:物质点法数值模拟铝泡沫超高速动力响应。

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摘要

Owing to its low density and good energy absorption capability, aluminum foam is an excellent protective material for spacecraft against debris impact. However, because of its complicated microstructure, it is very difficult to generate a FEM mesh accounting for the real microstructure of the alluminum foam. On the contrary, it is very easy to model three-dimensional problems with very complicated geometry with meshfree/meshless methods. Furthermore, the material point method has obvious advantages in modeling problems involving extreme large deformation problems like hypervelocity impact problem. In this paper, a three-dimensional material point model accounting for the real microsctructure of aluminum foam is created based on the scanned CT images, and is used to study the protective capacity of aluminum foam in different Whipple shield structures using our three-dimensional material point method code, MPM3D. The simulation results agree well with the experimental data.
机译:由于其低密度和良好的能量吸收能力,泡沫铝是航天器抗碎片撞击的极佳保护材料。然而,由于其复杂的微观结构,很难生成考虑到铝泡沫的真实微观结构的FEM网格。相反,使用无网格/无网格方法对具有非常复杂的几何形状的三维问题进行建模非常容易。此外,材料点法在建模问题中具有明显的优势,该问题涉及到超大冲击问题等超大变形问题。在本文中,基于扫描的CT图像,创建了一个解释泡沫铝真实微观结构的三维材料点模型,并使用我们的三维材料来研究泡沫铝在不同Whipple屏蔽结构中的防护能力点方法代码,MPM3D。仿真结果与实验数据吻合良好。

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