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International Journal of Automotive Technology > Volume 23(6); 2022 > Article
International Journal of Automotive Technology 2022;23(6): 1555-1568.
doi: https://doi.org/10.1007/s12239-022-0136-5
NUMERICAL ANALYSIS AND THEORETICAL PREDICTION OF AXIAL CRUSHING CHARACTERISTICS OF MIXED THIN-WALLED TUBES WITH DUAL-VARIABLE ATTRIBUTE
Xu Feng Xiang 1,2, Niu Xiao Qiang 1,2, Shao Tian Ru 1,2
1Hubei Key Laboratory of Advanced Technology of Automotive Components, Wuhan University of Technology
2Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology
PDF Links Corresponding Author.  Xu Feng Xiang  , Email. xufx@whut.edu.cn
ABSTRACT
Thin-walled structures with varying thickness (single variable attribute) had been proven to be able improve energy absorption characteristics. In order to further study the energy absorption characteristics of thin-walled structures whose material properties changed as the thickness changing, a novel type of mixed thin-walled tube with axially-varying thickness and material were proposed in this paper. The finite element (FE) model was validated under axial quasi-static loading firstly, and seven groups simulation models of thin-walled tubular structure were established. The simulation results showed that the dual-variable attribute tubes can ensure high energy absorption and reduce the initial peak crushing force effectively in the crushing process. Furthermore, the maximum crushing force efficiency of steel-aluminum mixed tube can reach 2.77, while the aluminum mixed tube increased the crushing force efficiency to 1.24. Subsequently, a analytical model for dual-variable attribute tube was established and the theoretical mean crushing force calculation formula can be derived. The simulation and theoretical results were wirelessly close, except that the error of SUT5 was about 11 %. Therefore, the theoretical prediction results were in good agreement with the simulation results, and the theoretical prediction method can provide some reference for the design of double variable tube.
Key Words: Dual variable properties, Steel-aluminum mixed, Quasi-static crushing, Thin-walled tube, Finite element analysis
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