Multi-objective optimization of crash box filled with three-dimensional cellular structure under multi-angle impact loading
| Autor: | Yongfeng Pu, Wang Qiang, Zhao Ying, Fangwu Ma, Liang Hongyu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Computer science
business.industry Mechanical Engineering Structure (category theory) Aerospace Engineering Oblique case 02 engineering and technology Structural engineering 021001 nanoscience & nanotechnology Collision Multi-objective optimization Finite element method Crash box 020303 mechanical engineering & transports 0203 mechanical engineering Impact loading Crashworthiness 0210 nano-technology business |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. :095440702199817 |
| ISSN: | 2041-2991 0954-4070 |
| DOI: | 10.1177/0954407021998174 |
| Popis: | Oblique impact loading conditions are common in automobile collision accidents, which strongly influence the energy absorption performance of thin-walled structures. In this paper, a novel three-dimensional (3-D) hexagonal structure-filled crash box with better comprehensive crashworthiness under multiple working conditions is proposed. First, the finite element models of four 3-D typical cellular structures (hexagon structure, re-entrant hexagon structure, star-shape structure, double arrow structure) are established. The dynamic responses of four structures under different impact angles (from 0° to 30°) and impact velocities (from 5 to 15 m/s) are discussed. The results reveal that the 3-D hexagonal structure has great advantages in terms of the energy absorption at varying inclination angles. Second, the 3-D hexagonal structure is filled in the crash box in the form of gradient distribution. The multi-island genetic algorithm (MIGA) based on the response surface model (RSM) is utilized to explore the optimal design of crash box. Compared with the traditional crash box, the optimal 3-D hexagonal structure-filled crash box increases 18.9% in specific energy absorption and decreases 21.7% in maximum peak force, which demonstrates great potential for applications in impact engineering. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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