Crashworthiness analysis and optimization on bio-inspired multi-cell thin-walled tubes

NIU Cong; HUANG Han; XIANG Zhixin; YAN Qinghao; CHEN Jinbao; XU Shucai

doi:10.11883/bzycj-2021-0527

Volume 42 Issue 10

Oct. 2022

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NIU Cong, HUANG Han, XIANG Zhixin, YAN Qinghao, CHEN Jinbao, XU Shucai. Crashworthiness analysis and optimization on bio-inspired multi-cell thin-walled tubes[J]. Explosion And Shock Waves, 2022, 42(10): 105901. doi: 10.11883/bzycj-2021-0527

Citation:

NIU Cong, HUANG Han, XIANG Zhixin, YAN Qinghao, CHEN Jinbao, XU Shucai. Crashworthiness analysis and optimization on bio-inspired multi-cell thin-walled tubes[J]. Explosion And Shock Waves, 2022, 42(10): 105901. doi: 10.11883/bzycj-2021-0527

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Crashworthiness analysis and optimization on bio-inspired multi-cell thin-walled tubes

doi: 10.11883/bzycj-2021-0527

1.
College of Engineering, University of Strathclyde, Glasgow G1 1XQ, Scotland, UK
2.
College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, Jiangsu, China
3.
State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China

Received Date: 2021-12-23
Rev Recd Date: 2022-06-29

Available Online: 2022-08-11

Publish Date: 2022-10-31

Abstract

Abstract

To improve the crashworthiness of thin-walled tube structures, a series of bio-inspired multi-cell thin-walled tubes with sinusoidal cells (abbreviated BSTs) were designed based on the dactyl club microstructure of Odontodactylus scyllarus (O. scyllarus) using bionic design methods. By taking initial peak load, specific energy absorption and crushing force efficiency as crashworthiness indexes, the influences of cell numbers on the crashworthiness of the BSTs under different impact angles (0º, 10º, 20º and 30º) conditions were analyzed under low-velocity impact condition using the nonlinear finite element (FE) method through LS-DYNA. The optimal number of bionic cells was obtained using complex proportion assessment. A complex proportional assessment (COPRAS) method was used to select the optimal number configuration under multiple loading angles. Base on the combination of weight factor values of different impact angles, four single-angle cases (1–4) and three multi-angle cases (5–7) were set. A metamodel-based multi-objective optimization method based on polynomial regression (PR) metamodels and a multi-objective particle optimization (MOPSO) algorithm were employed to optimize the dimensions of the optimal cell number configuration, where the initial peak load, specific energy absorption and crushing force efficiency were taken as objectives and the height-width ratio and thickness were regarded as the design variables. According to the results of the COPRAS method, the BST with four sinusoidal cells was determined to be the best design based on the multi-criteria process. The optimization results of single-angel cases show that, the optimal height-width ratio ranges from 0.88 to 1.50, and the optimal thickness ranges from 0.36 mm to 0.60 mm. The optimal height-width ratios of cases 1–2 are significantly smaller than those of cases 3–4 . The BST with four sinusoidal cells has the maximum optimal thickness of 0.6 mm when the impact angles is 0º. For multi-angel cases, the optimal height-width ratio ranges from 1.01 to 1.10, and the optimal thickness ranges from 0.49 mm to 0.57 mm. The results above are helpful for exploring the lightweight design of new thin-walled tube structures and providing new ideas for their application in energy absorption and crashing field.
- multi-cell thin-walled tube,
- crashworthiness,
- multi-objective optimization,
- bionic design,
- impact

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References(22)

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