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论文类型：期刊论文

第一作者：Dai, Minghua

通讯作者：Ying, L (reprint author), Dalian Univ Technol, Sch Automot Engn, Dalian, Peoples R China.

合写作者：Ying, Liang,Ma, Haolin,Chen, Shuai,Hu, Ping

发表时间：2019-05-04

发表刊物：INTERNATIONAL JOURNAL OF CRASHWORTHINESS

收录刊物：SCIE、EI

卷号：24

期号：3

页面范围：257-271

ISSN号：1358-8265

关键字：Functionally graded strength (FGS); tapered angle; thin-walled structure; crashworthiness; multi-objective optimisation

摘要：This paper compares the crashworthiness characteristics of straight functionally graded strength (SFGS), tapered uniform strength (TUS) and classical straight uniform strength (SUS) tubes under axial crushing loading. Based on the numerical simulation, multi-optimisations are performed to optimise the crashworthiness of the SFGS, TUS and SUS tubes. Result of comparative study shows that the SFGS tubes are similar to the TUS tubes to some extent, since both of them have obviously larger CFE value, relatively good comprehensive crashworthiness and more predominant Pareto fronts than the traditional SUS tubes. Nevertheless, obvious differences between SFGS and TUS tubes exist. The relative differences of SEA and PCF for all the SFGS tubes are positive while that of the TUS tubes are negative. Finally, the comparison on Pareto fronts suggests that if the allowable tapered angle is big enough, it is better to employ the TUS tubes with relatively big tapered angle.