Bending Crashworthiness of Thin⁃Walled Square Tubes Partially Filled with Metallic Foams  

作　　者：Zhongyou Xie Limin Guo Cheng Li Jianwen Cai 

机构地区：[1]School of Architectural Engineering,Tongling University,Tongling 244061,Anhui,China [2]School of Science,Changzhou Institute of Technology,Changzhou 213032,Jiangsu,China [3]School of Automotive Engineering,Changzhou Institute of Technology,Changzhou 213032,Jiangsu,China

出　　处：《Journal of Harbin Institute of Technology(New Series)》2025年第2期24-37,共14页哈尔滨工业大学学报(英文版)

基　　金：Sponsored by National Natural Science Foundation of China(Grant Nos.12272064 and 12101086);University Natural Science Research Project of Anhui Province(Grant No.KJ2018A0481);Major Project of Basic Science(Natural Science)Research in Jiangsu Universities(Grant Nos.22KJA460001,23KJA580001);Changzhou Science and Technology Plan Project(Grant No.CE20235049);and Changzhou Leading Innovative Talents Cultivation Project(Grant No.CQ20220092)。

摘　　要：Two cross⁃sectional configurations of thin⁃walled square tubes partially filled with lightweight metallic foams are proposed,and termed as double⁃cell configuration partially filled with foam(DC⁃PF)and double⁃tube configuration partially filled with foam(DT⁃PF),respectively.The bending crashworthiness is investigated based on three⁃point bending tests using finite element ABAQUS/Explicit code.The two key mechanical indicators including Crash Load Efficiency(CLE)and Specific Energy Absorption(SEA)are introduced to evaluate the effect of foams in comparison with empty square tubes and fully filled square tubes.The numerical results show that the two partially filled configurations,especially DT⁃PF,display dramatically excellent bending crashworthiness compared with empty and fully filled square tubes.There exists a foam density threshold,beyond which the CLE of DT⁃PF achieves a maximum constant.In addition,there seems to be another foam density threshold,beyond which the SEA of DT⁃PF gets to the maximum value.It is also shown that the foam density threshold corresponding to the maximum SEA varies with the thickness of thin⁃walled square tubes.

关 键 词：thin⁃walled tube lightweight foam bending crashworthiness energy absorption finite element analysis 

分 类 号：O347[理学—固体力学]