Crashworthiness of extruded magnesium thin-walled square tubes

作     者：Zhi-gang LI Hai-feng YANG Zhao-sheng ZHANG Ye SUN Zhi-tong HAN Ji-fei WEI 李志刚;杨海峰;张照生;孙野;韩郅通;韦济飞

作者机构：School of Mechanical Electronic and Control Engineering Beijing Jiaotong University Beijing 100044 China School of Mechanical Engineering Beijing Institute of Technology Beijing 100081 China Jilin Jihua Construction and Maintenance Limited Company Jilin 132021 China 

基　　金：Project(2017JBM041)supported by the Fundamental Research Funds for the Central Universities,China Project(51505024)supported by the National Natural Science Foundation of China Project supported by the Foundation of Zhejiang Key Laboratory of Automobile Safety Technology of China 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2019年第29卷第6期

页      码：1223-1232页

摘      要：Axial compression tests were conducted on AZ31 B magnesium and A6063 aluminum thin-walled square tubes with varied lengths and induced features at different compression rates. In compression, the magnesium tubes exhibited a "local buckling and fracture" mode, with three fracture patterns, i.e."horizontal","double-oblique", and "spiral" fractures. In general, the magnesium tube showed an inferior crashworthiness to the aluminum square tube. In addition, the effects of L/W ratio, strain rate and induced features on the crashworthiness of thin-walled square tubes were investigated. With an increase in the L/W ratio(L and W represent the tube length and width, respectively) from 1 to 4, the maximal force and global specific energy absorption decreased in a power-law trend for the magnesium tubes,while they remained approximately constant for the aluminum tubes. Furthermore, as the compression rate increased from 5×10-5 to 10 m/s, the primary crashworthiness parameters of the magnesium tubes increased in an approximately exponential manner,while for the aluminum tubes,they changed slightly. Finally,the involved induced features were proven to be not an effective method to improve the specific energy absorption of magnesium tubes, thus, more trigger types,locations,and sizes will be evaluated in future to improve the energy-absorption ability.

主 题 词：magnesium square tube crashworthiness length/width ratio strain rate induced feature 

学科分类：08[工学] 080502[080502] 0805[工学-能源动力学] 

核心收录：

D　O　I：10.1016/S1003-6326(19)65029-6

馆 藏 号：203688823...