Quasi-Static Axial Compression of Origami Crash Boxes
Quasi-Static Axial Compression of Origami Crash Boxes
复制标题
折纸碰撞盒的准静态轴向压缩
DOI：
10.1142/s1758825117500661
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发表时间：
2017-07-01
影响因子：
3.5
通讯作者：
Zhu, S. Y.
中科院分区：
文献类型：
--
作者：
Zhou, C. H.;Wang, B.;Zhu, S. Y.
折纸吸能盒已被公认为是一种高效的能量吸收装置。本文通过准静态轴向压缩试验和数值模拟来研究折纸吸能盒的能量吸收能力。完整的菱形模式可以成功触发，这表明当管承受准静态载荷时，这种塌陷模式对几何缺陷不敏感。结果证实，具有较长模块 (l/t = 60) 的轴向压缩管比具有短模块 (l/t = 40) 的轴向压缩管具有更高的平均破碎力。此外，为了计算折纸碰撞盒中各区域的能量耗散百分比，利用电学测量和非接触式光学测量对壳体在两个代表性区域的塑性变形进行了测量和分析。结果表明，约10%的总能量被这些壳吸收，其大小足以影响超折叠单元理论推导表达式的预测精度。
The origami crash box has been recognized as an efficient energy absorption device. In this paper, quasi-static axial compression tests and numerical simulations are carried out to investigate the energy absorption capacity of origami crash box. The complete diamond mode could be successfully triggered, which indicates that this collapse mode is insensitive to geometric imperfection when the tube is subjected to quasi-static loading. And the results confirm that axially compressed tubes with longer modules (l/t = 60) renders higher mean crushing force than those with short modules (l/t = 40). Moreover, in order to figure out the energy dissipation percentage of each region in origami crash box, the plastic deformation of shells in two representative regions is measured and analyzed by utilizing electrical measurement and noncontact optical measurement. The results reveal that about 10% of total energy is absorbed by those shells, which is large enough to affect the prediction accuracy of expressions deduced by super folding element theory.