Citation

Dai C, Yu P, Yin M, Long J. Int. J. Crashworthiness 2024; 29(1): 163-177.

Copyright

(Copyright © 2024, Informa - Taylor and Francis Group)

DOI

10.1080/13588265.2023.2230628

PMID

unavailable

Abstract

To improve the safety performance and light weight of the bumper subsystem under low-speed collisions with multiple loads, this study develops a systematic optimization strategy. First, the accuracy of the finite element model is verified through experiments. Meanwhile, the crashworthiness of the three different bumper beams made of aluminum alloy, high-strength steel, and carbon fiber-reinforced polymer (CFRP) is compared and analyzed. Second, the optimal combination of single-layer thickness and lay-up angle of the CFRP bumper beam is discussed. Finally, an optimization strategy combining Hammersley experimental design, hybrid approximation model, NSGA-II algorithm, combined weights, and technique for order preference by similarity to an ideal solution and grey relational analysis (TOPSIS&GRA) integrated decision is proposed and applied to the optimal design of the CFRP bumper beam. The optimization results show that the optimized CFRP bumper beam is 57.18% lighter than the original aluminum composite bumper beam while meeting the requirements of crashworthiness.

Language: en

Keywords

Bumper beam; carbon fiber-reinforced polymer; multi-objective design optimization; TOPSIS&GRA