Dynamic Response of Biomimetic Gradient Double Corrugated Structure under Simulated Blast Load

doi:10.12382/bgxb.2025.0344

Abstract

Abstract:

Sandwich structure is widely used in the field of shock protection, but the traditional cores often suffer from insufficient load stability, which limits their shock resistance performance. Inspired by the cuttlefish bone and incorporating the dynamic enhancement effect of cellular material, a biomimetic gradient double corrugated sandwich structure is proposed. A systematic study is conducted on its shock resistance performance by using graded cellular projectiles as loading means. The results show that, compared with the biomimetic double corrugated sandwich structure without gradient design, the proposed sandwich structure has excellent shock resistance, with an improvement in crushing force efficiency of 26.4%. When the gradient distribution parameters and the axial ratio are controlled within the ranges of 0.1-0.15 and 0.5-0.75, respectively, the crushing force efficiency of the structure remains stable at about 80%. This research provides novel insights and methodologies for the design and evaluation of new protective structures.

Key words: shock resistance, finite element simulation, graded cellular projectile, sandwich structure, gradient design

YI Xiaofei, PENG Kefeng, CHANG Baixue, ZHANG Yuanrui, LIU Jiagui, ZHENG Zhijun. Dynamic Response of Biomimetic Gradient Double Corrugated Structure under Simulated Blast Load[J]. Acta Armamentarii, 2025, 46(10): 250344-.

Figures/Tables 14

Fig.1 Microstructure of cuttlefish bone[15,17]

Fig.2 A biomimetic gradient double corrugated core

Fig.3 Design of simulated blast load

Fig.4 A finite element model of the biomimetic gradient double corrugated sandwich structure impacted by graded cellular projectile

Fig.5 Comparison of numerically simulated and experimental results

Fig.6 Performance comparison of biomimetic double corrugated sandwich structures with/without gradient

Fig.7 Deformation diagrams of biomimetic double corrugated sandwich structures

Table 1 Geometric parameters of biomimetic gradient double corrugated sandwich structure

序号	b_u/ mm	b_l/ mm	R/ mm	L/ mm	N	k	γ_u	γ_l	M/ g
1	1.5	2.5	2.0	48	4	0.05	0.75	1.25	1.57
2	3.0	5.0	4.0	48	4	0.10	0.75	1.25	1.57
3	4.5	7.5	6.0	48	3	0.15	0.75	1.25	1.18
4	6.0	10.0	8.0	48	3	0.20	0.75	1.25	1.18
5	1.0	3.0	2.0	48	4	0.10	0.5	1.50	1.58
6	2.0	4.0	2.7	48	4	0.10	0.75	1.50	1.67
7	4.0	6.0	4.0	48	3	0.10	1.00	1.50	1.33
8	10.0	12.0	8.0	48	2	0.10	1.25	1.50	0.93
9	6.0	8.0	8.0	48	3	0.10	0.75	1.00	1.10
10	1.5	3.5	2.0	48	4	0.10	0.75	1.75	1.77
11	5.0	5.0	5.0	50	4	0.00	1.00	1.00	1.50
12	3.0	5.0	5.0	50	4	0.10	0.60	1.00	1.48
13	3.0	6.0	5.0	50	4	0.15	0.60	1.20	1.56
14	3.8	5.8	5.0	50	4	0.10	0.75	1.15	1.60

Fig.8 The effect of k on the shock resistance of biomimetic gradient double corrugated sandwich structure

Fig.9 The effect of γu on the shock resistance of biomimetic gradient double corrugated sandwich structure

Fig.10 The effect of γl on the shock resistance of biomimetic gradient double corrugated sandwich panels

Fig.11 Transmitted stress-deformation curves of biomimetic gradient double corrugated sandwich structures with different geometrical parameters

Fig.12 Comparison of predicted and calculated average stresses of biomimetic gradient double corrugated sandwich structure

Fig.13 Transmitted stress-deformation curve of biomimetic gradient double corrugated sandwich structure with customized design

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