Collapse modes and energy absorption performance of conventional and re-entrant hexagonal tubes under lateral compression

被引：0

作者：

Liu J. ^{[1
]}

Liu H. ^{[1
]}

Yang J. ^{[1
]}

机构：

[1] School of Aeronautic Science and Engineering, Beihang University, Beijing

来源：

Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics | 2023年 / 49卷 / 08期

基金：

中国国家自然科学基金;

关键词：

energy absorption; hexagonal tube; lateral compression; plastic deformation; re-entrant structure;

D O I：

10.13700/j.bh.1001-5965.2021.0623

中图分类号：

学科分类号：

摘要：

Hexagonal thin-walled structures are widely used in the field of energy absorption and protection. To improve the energy absorption performance of hexagonal thin-walled tubes, in this study, a comparative study on the collapse modes and energy absorption performance of the conventional and re-entrant hexagonal tubes under lateral compression was performed. The theoretical models of these two kinds of hexagonal tubes were established and the effect of strain-hardening was taken into account. Then the finite element analyses were conducted by using the commercial software ABAQUS. The deformation modes and force-displacement relations obtained from the finite element analyses were compared with those predicted by the theoretical models. The results of the finite element and theory show a good degree of concordance. The plastic deformation behavior and energy absorption performance of the conventional and re-entrant hexagonal tubes with different inclination angles under lateral compression were explored. It is found that, compared with the conventional hexagonal tubes, the energy absorption performance of the re-entrant hexagonal tubes is better. The stroke efficiency and energy absorption of the re-entrant hexagonal tubes are respectively 1.41～ 1.62 times and 1.79～ 1.83 times those of the corresponding conventional hexagonal tubes. In addition, the re-entrant hexagonal tubes requires less installation space. © 2023 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.

引用

页码：2021 / 2028

页数：7

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