Mechanics of axial plastic collapse in multi-cell, multi-corner crush tubes

被引：150
作者：
Najafi, Ali [1 ]
Rais-Rohani, Masoud [1 ]
机构：
[1] Mississippi State Univ, Ctr Adv Vehicular Syst, Dept Aerosp Engn, Mississippi State, MS 39762 USA
来源：
THIN-WALLED STRUCTURES | 2011年 / 49卷 / 01期
关键词：
Crush tube; Energy absorption; Mechanics of crush; Multi-corner tube; Quasi-static crush; THIN-WALLED STRUCTURES; ENERGY-ABSORPTION; COLUMNS; IMPACT;
D O I：
10.1016/j.tws.2010.07.002
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Quasi-static nonlinear finite element simulations are performed to study the energy absorption characteristics of axially crushed thin-walled aluminum tubes with different multi-cell, multi-corner configurations. By considering the kinematically consistent representation of plastic collapse as observed in the crush simulations, an analytical formula for the mean crush force is derived using the super folding element theory. In this model, the isotropic material is treated as rigid-perfectly plastic and the total internal energy is calculated by considering both bending and membrane deformation during the folding process. The simulation results show a strong correlation between the cross-sectional geometry and the crush response of the tubes. The analytical predictions for the mean crush force are compared with the FE results as well as other analytical models reported in the literature. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1 / 12
页数：12
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