Axial crushing of circular multi-cell columns
Axial crushing of circular multi-cell columns
复制标题
圆形多室柱的轴向破碎
DOI：
10.1016/j.ijimpeng.2013.12.002
复制
发表时间：
2014-03-01
影响因子：
5.1
通讯作者：
Zhang, Hui
中科院分区：
文献类型：
--
作者：
Zhang, Xiong;Zhang, Hui
多单元柱是在轴向压缩下的高效能量吸收部件。然而，对其变形模式和机理的实验研究和理论分析却很少。本文对多室圆柱的轴向压溃问题进行了实验、数值和理论研究。采用非线性有限元软件LS-DYNA对不同截面的多室圆压柱进行了拟静力试验研究。描述了多室柱的变形模式，并与简单圆管的吸能性能进行了比较。然后提出了基于组成元素法的理论模型来预测圆形多室试样的抗压碎性。理论预测被发现是在一个很好的协议与实验和数值结果。(C)2013爱思唯尔有限公司保留所有权利。
Multi-cell columns are highly efficient energy absorbing components under axial compression. However, the experimental investigations and theoretical analyses for the deformation modes and mechanisms of them are quite few. In this paper, the axial crushing of circular multi-cell columns are studied experimentally, numerically and theoretically. Circular multi-cell columns with different sections are axially compressed quasi-statically and numerical analyses are carried out by nonlinear finite element code LS-DYNA to simulate the experiments. The deformation modes of the multi-cell columns are described and the energy absorption properties of them are compared with those of simple circular tube. Theoretical models based on the constituent element method are then proposed to predict the crush resistance of circular multi-cell specimens. The theoretical predictions are found to be in a good agreement with the experimental and numerical results. (C) 2013 Elsevier Ltd. All rights reserved.