Axial crushing and optimal design of square tubes with graded thickness

被引：192

作者：

Zhang, Xiong ^{[1
,3
]}

Wen, Zhuzhu ^{[1
]}

Zhang, Hui ^{[2
]}

机构：

[1] Huazhong Univ Sci & Technol, Dept Mech, Wuhan 430074, Hubei, Peoples R China

[2] Wuhan Text Univ, Sch Mech Engn & Automat, Wuhan 430073, Hubei, Peoples R China

[3] Hubei Key Lab Engn Struct Anal & Safety Assessmen, Wuhan 430074, Peoples R China

来源：

THIN-WALLED STRUCTURES | 2014年 / 84卷

基金：

中国国家自然科学基金;

关键词：

Axial crushing; Square tube; Energy absorption; Graded thickness; RSM optimization; THIN-WALLED STRUCTURES; ALUMINUM FOAM FILLER; ENERGY-ABSORPTION; CRASHWORTHINESS DESIGN; ANGLE ELEMENTS; CRASH BEHAVIOR; MULTICELL; COLUMNS; OPTIMIZATION; EXTRUSIONS;

D O I：

10.1016/j.tws.2014.07.004

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Introducing thickness gradient in cross-section is a quite promising approach to increase the energy absorption efficiency and crashworthiness performance of thin-walled structures. This paper addresses the deformation mode and energy absorption of square tubes with graded thickness during axial loading. Experimental study is firstly carried out for square tubes with two types of thickness distributions and numerical analyses are then conducted to simulate the experiment. Both experimental and numerical results show that the introduction of graded thickness in cross-section can lead to up to 30-35% increase in energy absorption efficiency (specific energy absorption) without the increase of the initial peak force. In addition, structural optimization of the cross-section of a square tube with graded thickness is solved by response surface method and the optimization results validate that increasing the material in the corner regions can indeed increase the energy absorption efficiency of a square tube. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：263 / 274

页数：12

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