Crush behaviour of auxetic cellular structures

N. Novak, M. Vesenjak, Z. Ren
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引用次数: 16

Abstract

The auxetic cellular structures build from inverted tetrapods were fabricated and experimentally tested using uniaxial compression tests in two orthogonal directions. Based on experimental results, the computational models using homogenised material model were developed and validated in LS-DYNA. Furthermore, the computational models based on Smooth Particle Hydrodynamic (SPH) method for simulation of blast loading conditions were developed, verified and validated according to the data available in literature. This computational model was then used to simulate the crush behaviour of composite sandwich panel with auxetic core under blast loading. The results show that the use of the composite sandwich panel with auxetic core reduces the maximum displacement by 33% in comparison to the monolithic plate of the similar mass, while simultaneously a 6% mass reduction can be observed.

缺乏细胞结构的挤压行为
采用正交单轴压缩试验对倒置四足动物的增氧细胞结构进行了实验研究。基于实验结果,建立了基于均质材料模型的计算模型,并在LS-DYNA中进行了验证。在此基础上,建立了基于光滑颗粒流体力学(SPH)方法的爆炸加载条件模拟计算模型,并根据文献数据进行了验证。利用该计算模型模拟了爆破载荷作用下复合材料夹层板的破碎行为。结果表明:与相同质量的单片板相比,复合夹层板的最大位移减少了33%,同时质量减少了6%;
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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