Blunt Trauma Resistance of Graphene and Polyethylene-modified Aramid Fabrics under Ballistic Impact

doi:10.12382/bgxb.2022.0578

Abstract

Abstract:

Aramid is widely used in the field of ballistic protection due to its light weight and high strength. In order to improve the trauma resistance of single-layer aramid fabrics, the surface modification methods of thermoplastic resin polyethylene (PE) and graphene nanoparticles (GR) are used innovatively to improve the ballistic performance of aramid fabrics. The trauma resistance and energy absorption of modified aramid fabrics with different mass ratios are studied based on the backface significance (BFS). The results show that both graphene and polyethylene modification methods can improve the blunt trauma resistance. The surface density of the modified fabric is increased slightly by polyethylene modification, but the resistance to blunt injury is significantly improved. Compared with pure aramid fabric, the bullet-proof ability and specific energy absorption value of 10% PE are increased by 18.0% and 30.8%, respectively. The increased rigidity of graphene-modified fabric increases its resistance to blunt injury at low speed, but the excessive inter-yarn friction weakens its resistance to blunt injury at high speed. 2% GR is the best ratio for graphene-modified fabric. In addition, the combined design of body armor with 2 layers of 10% PE and 13 layers of six layers of orthogonal UHMWPE unidrectional fabric is obtained through optimization and verification.

Key words: modified aramid fabric, blunt trauma resistance, backface signature, bulletproof performance, energy absorption

CLC Number:

WANG Zhe, LIU Peng, CHEN Jing, HUANG Guangyan, ZHANG Hong. Blunt Trauma Resistance of Graphene and Polyethylene-modified Aramid Fabrics under Ballistic Impact[J]. Acta Armamentarii, 2024, 45(1): 35-43.

Figures/Tables 13

Fig.1 Schematic diagram of fabric preparation process

Table 1 Parameters of the composite fabrics

织物类型	浸渍液质量分数/ wt.%			平均面密度ρ_S/ (×10^-3kg·m^-2)		增重/ %
织物类型	GR	PE	无水乙醇	前	后	增重/ %
Twaron	0	0	0	200	200	0
10%PE	0	10	90	200	213	6.5
20%PE	0	20	80	200	221	10.5
30%PE	0	30	70	200	231	15.5
20%PE+1%GR	1	20	79	200	224	12.0
20%PE+2%GR	2	20	78	200	231	15.5
20%PE+3%GR	3	20	77	200	239	19.5
10%PE+2%GR	2	10	88	200	217	8.5

Fig.2 Schematic diagram of ballistic experiment

Fig.3 Projectile (right) and sabots (left)

Fig.4 Layout of single-layer fabric target

Fig.5 Body armor sample

Fig.6 Comparison of experimental data and fitting curves of polyethylene-modified fabrics with different concentrations

Fig.7 Comparison of experimental data and fitting curves of graphene-modified fabrics with different concentrations

Fig.8 Comparison of SEAH values of different fabrics

Table 2 Body armor experimental results

试样	靶板种类	面密度/ (kg·m^-2)	入射速度/ (m·s^-1)	凹陷/ mm	穿透/ 层
A	2×(10%PE+2%GR)+ 13×6UD	4.78	327	9.03	3
B	2×(10%PE)+13×6UD	4.81	471	9.03	5
C	2×(10%PE+2%GR)+ 22×4UD	4.96	353	9.62	7
D	2×(10%PE)+22×4UD	4.96	353	7.25	5

Fig.9 Comparison of experimental data and fitting curves of different body armor samples

Fig.10 Deformation diagram of modified fabric when BFS is 25mm

Fig.11 Topography of different fabrics

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