Energy absorption capacity of regular polygon-based multi-cell tubes

被引：0
|
作者：
Liu Y. [1 ]
He Y. [1 ]
Liu S. [1 ]
Li Z. [1 ,2 ,3 ]
机构：
[1] Institute of Applied Mechanics, College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan, 030024, Shanxi
[2] Shanxi Key Laboratory of Material Strength and Structural Impact, Taiyuan University of Technology, Taiyuan, 030024, Shanxi
[3] National Demonstration Center for Experimental Mechanics Education, Taiyuan University of Technology, Taiyuan, 030024, Shanxi
来源：
Baozha Yu Chongji/Explosion and Shock Waves | 2020年 / 40卷 / 07期
关键词：
Deformation mode; Drop-hammer impact; Energy absorption; Multi-cell thin-wall structure; Quasi-static loading;
D O I：
10.11883/bzycj-2019-0423
中图分类号：
学科分类号：
摘要：
With the characteristics of light weight and high specific energy absorption, multi-cell thin-wall structures have been widely used in automobile, ship, aerospace and other fields. Previous studies have shown that the crashworthiness of a structure is closely related to its topology and cell number. In order to study the influence of the structural shape and topology optimization on energy absorption, based on regular polygon structures, two kinds of new multi-cell thin-wall structures were designed by embedding polygons in the basic structures given and circumscribing circular tubes to them, respectively. Meanwhile, quasi-static compression and drop-hammer impact tests were carried out on the two kinds of multi-cell thin-wall structures. The deformation modes of the structures were captured by high-speed cameras, and their energy absorption characteristics were studied quantitatively. The experimental results show that local instability occurred in the structures obtained by second-order embedding quadrangles into the basic regular triangle tubes in the later stage of the quasi-static loading test; the other structures were compressed vertically in the quasi-static compression and drop hammer impact tests, and their corresponding deformation modes and energy absorption capacities were excellent. By comparing the experimental results of two kinds of structures, following conclusions are drawn: the energy absorption of the polygon-embedded structures is obviously higher than that of the structures by externally circumscribing a circular tube under quasi-static loading and drop hammer impact tests; the energy absorption performance of the quadrangle-embedded structure is obviously better than that of the triangle-embedded structure with the same mass. © 2020, Editorial Staff of EXPLOSION AND SHOCK WAVES. All right reserved.
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