Theoretical and numerical investigation on the crush resistance of rhombic and kagome honeycombs

Theoretical and numerical investigation on the crush resistance of rhombic and kagome honeycombs
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菱形和戈薇蜂窝抗压碎性能的理论和数值研究

DOI:
10.1016/j.compstruct.2012.09.028
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发表时间:
2013-02
影响因子:
6.3
通讯作者:
Zhang, Hui
Zhang, Hui
中科院分区:
工程技术1区
文献类型:
--
作者:
Zhang, Xiong;Zhang, Hui

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本文研究了菱形和Kagome蜂窝结构的平面外压碎特性,将整个结构划分为基本的角形单元和X形单元。提出了角形单元无伸缩模式和X形单元倒塌模式的吸能机理的两种理论模型。推导出了角元平均破碎力的预测公式。利用非线性有限元程序LS-DYNA对平面外压碎角元进行了数值模拟。分析了不同几何构型(角、宽、厚)的角元的抗压强度。理论预测与数值结果的对比表明,理论模型能有效地预测角构件的平均破碎力,具有很好的精度。
The out-of-plane crushing properties of rhombic and kagome honeycombs are studied in this paper by dividing the whole structure into basic angle elements: corner elements and X-shaped elements. Two theoretical models are presented to analyze the energy absorption mechanisms for inextensional mode of corner elements and one of collapse modes of X-shaped elements respectively. Expressions are derived to predict the mean crushing force of the angle elements. Numerical simulations are also carried out for angle elements under out-of-plane crushing by using nonlinear finite element code LS-DYNA. Crush resistance of angle elements with different geometric configurations including angle, width and thickness is analyzed. A comparison between theoretical predictions and numerical results shows that the theoretical models can effectively predict the mean crushing force of angle elements with a very good accuracy.
DOI: 10.1016/j.compstruct.2012.02.024
发表时间: 2012-07
影响因子: 6.3
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