Transactions of Materials and Heat Treatment

Title：Research and optimization on crashworthiness for semi-closed hin-walled structures

Authors： Ma Xiao Li Yewen

Unit： Civil Aviation College Shenyang Aerospace University Shenyang 110000 China

KeyWords： thin-walled structure semi-closed response surface method crashworthiness energy absorption performance

ClassificationCode：O342

year,vol(issue):pagenumber：2025,50(6):78-85

Abstract：

Thin-walled structures are widely used in automotive, aerospace and other fields due to their excellent characteristics of light weight, easy production and good energy absorption. Therefore, based on the traditional energy-absorbing structures, a semi-closed thin-walled structure was proposed, and the crashworthiness of semi-closed aluminum alloy thin-walled tubes and ordinary bare tubes under four cross-sectional shapes was compared. The simulation results show that the energy absorption performance of the semi-enclosed thin-walled tube is better than that of the ordinary bare tube, and the semi-closed square tube structure has a strong energy absorption capacity with a specific energy absorption of up to 17952.20 J·kg-1, which is 110% higher than that of the square bare tube. Among them, the semi-closed thin-walled tube with a pitch of 20 mm and two loops has better crashworthiness. Finally, the structure of the semi-closed tube was optimized by the response surface method. The results show that the thickness of the optimized thin-walled structure is 2.496 mm, the thickness of rib is 0.826 mm, and the pitch is 21.800 mm, which increases the specific energy absorption by 58.04% compared with that before optimization. Thus, the research results provide a certain theoretical basis for the practical application of semi-closed structure.

Funds：

校引进人才科研启动基金项目（19YB18）

作者简介：马箫（1987-），女，博士，讲师,E-mail：540721373@qq.com;通信作者：李烨雯（2000-），女，硕士研究生,E-mail：2416165907@qq.com

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