自相似分层蜂窝结构多碰撞工况耐撞性研究

doi:10.19562/j.chinasae.qcgc.2022.06.010

Abstract

Abstract:

Enlightened by horsetail plant， a bionic self-similar hierarchical honeycomb structure is proposed in this paper. Based on the finite element model verified by test， the crashworthiness performance of the novel and traditional honeycomb structures under multi-angle oblique collision conditions are comparatively analyzed， including deformation modes， stress-strain curves and energy absorption characteristics. The results show that the self-similar hierarchical honeycomb structure has stable deformation mode under both ideal frontal and oblique impact conditions， and stable and excellent energy absorption performance when the impact angle changes.

Key words: honeycomb structure, self-similar hierarchical design, oblique collision, crashworthiness

Fangwu Ma,Hao Sun,Hongyu Liang,Wenting Ma,Qiang Wang,Yongfeng Pu. Study on Crashworthiness of Self-Similar Hierarchical Honeycomb Structure Under Multiple Collision Conditions[J].Automotive Engineering, 2022, 44(6): 886-892.

Figures/Tables 14

References 15

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性能指标	传统蜂窝	自相似蜂窝	自相似蜂窝改善率
0°SEA/（J·kg^-1）	2 805	9 009	221.18%
5°SEA/（J·kg^-1）	2 696	8 904	230.28%
10°SEA/（J·kg^-1）	2 793	9 256	231.40%
15°SEA/（J·kg^-1）	2 904	8 934	207.64%
20°SEA/（J·kg^-1）	2 658	8 742	228.89%
25°SEA/（J·kg^-1）	2 201	8 379	2380.69%
30°SEA/（J·kg^-1）	2 230	8 329	273.50%
SEA_θ /（J·kg^-1）	2 612	8 793	236.64%
σ_E	0.100 2	0.035 4	64.67%

性能指标	传统蜂窝	自相似蜂窝	自相似蜂窝改善率
0°SEA/（J·kg^-1）	7 532	15 859	110.55%
5°SEA/（J·kg^-1）	7 038	14 971	112.72%
10°SEA/（J·kg^-1）	6 899	14 517	110.42%
15°SEA/（J·kg^-1）	5 996	14 291	138.34%
20°SEA/（J·kg^-1）	7 013	14 090	100.91%
25°SEA/（J·kg^-1）	6 116	13 527	121.17%
30°SEA/（J·kg^-1）	6 227	13 398	115.16%
SEA_θ /（J·kg^-1）	6 689	14 379	114.96%
σ_E	0.079 9	0.054 8	31.41%

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Study on Crashworthiness of Self-Similar Hierarchical Honeycomb Structure Under Multiple Collision Conditions

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