Crashworthiness Optimization of Steel–Magnesium Hybrid Double-Hat-Shaped Tubes

被引：4

作者：

Zheng G. ^{[1
]}

Fan Z. ^{[1
]}

Zhang H. ^{[1
]}

Zhou P. ^{[2
]}

机构：

[1] School of Automotive Engineering, Dalian University of Technology, Dalian

[2] German Aerospace Centre (DLR) -Institute of Vehicle Concepts, Pfaffenwaldring 38-40, Stuttgart

来源：

Automotive Innovation | 2018年 / 1卷 / 3期

基金：

中国国家自然科学基金;

关键词：

Crashworthiness; Hybrid double-hat-shaped tube; Lightweight design; Magnesium alloy; Steel;

D O I：

10.1007/s42154-018-0033-9

中图分类号：

学科分类号：

摘要：

The double-hat-shaped magnesium tube was difficult to use in actual applications due to its frangible material property. Magnesium alloy and traditional steel were integrated into a new hybrid thin-walled double-hat-shaped tube to improve vehicle crashworthiness. Two classes of hybrid tubes were examined, namely Hybrid-I (steel top hat and magnesium alloy bottom hat) and Hybrid-II (magnesium alloy top hat and steel bottom hat). The energy absorption characteristics and crashworthiness optimization of the thin-walled hybrid structures were investigated under three-point bending conditions through experiments and simulations. Multi-objective optimization design for the two hybrid tubes was implemented to elucidate their lightweight properties. Results showed that the specific energy absorption of Hybrid-I tube and Hybrid-II tube was approximately 44.7% and 12.7% higher than that of the double-hat-shaped DC04 tube, respectively. The Hybrid-I tube had better crashworthiness and lightweight properties compared with Hybrid-II tube. Hybrid-I tube also had better lightweight properties than single-material steel tube and reduced wall thickness compared with magnesium alloy tube. © 2018, China Society of Automotive Engineers (China SAE).

引用

页码：247 / 254

页数：7

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