Numerical Investigation of Anti-ballistic Property of ZnO-modified Aramid Fabrics

doi:10.12382/bgxb.2022.1297

Abstract

Abstract:

Aramid fabrics are widely used in the field of body armors due to their low density, high modulus and high strength. In order to improve the ballistic resistance of aramid fabrics, the aramid fabrics are modified by planting and growing the nano-ZnO particles. The electron microscope observation, quasi-static tensile test, yarn pull-out test, ballistic impact test and numerical simulation were made for ZnO-modified fabrics, and their mechanical and ballistic properties were studied. The results show that the planting of ZnO particles increases the structural interlock and surface roughness of yarns. Compared with the neat fabrics, the inter-yarn friction coefficient of ZnO-modified fabrics is increased by 282%, their ballistic limit velocity is increased by 54.5%, and their energy absorption and specific energy absorption performance are significantly better than those of neat fabrics. The ballistic impact process of the modified fabric is simulated by the meso-yarn model. The simulated results are in good agreement with the ballistic test results. This further explains that the improvement of inter-yarn friction coefficient and tensile strength is an effective means to enhance the ballistic impact resistance of fabrics, and provides a theoretical basis for the application of ZnO-modified fabrics in the field of flexible bulletproof.

Key words: aramid fabric, zinc oxide modification, ballistic limit, numerical simulation

CLC Number:

TQ325.1

XU Yaojie, LIU Han, ZHANG Hong, HUANG Guangyan. Numerical Investigation of Anti-ballistic Property of ZnO-modified Aramid Fabrics[J]. Acta Armamentarii, 2023, 44(10): 2897-2905.

Figures/Tables 18

Table 1 Parametric characteristics of fabrics

织物	面密度/ (g·m^-2)	较纯织物面密度增加百分比/%
纯织物	240.00	0
氧化锌改性织物	247.44	3.1

Fig.1 SEM images of neat and ZnO-modified fabrics

Fig.2 Layout of quasi-static tensile test

Fig.3 Quasi-static tensile results of neat and ZnO- modified fabrics

Fig.4 Layout of yarn pull-out test

Fig.5 Results of yarn pull-out test

Fig.6 Fabric ballistic performance testing system

Fig.7 Ballistic limit fit curves

Fig.8 SEA of single-layer fabrics

Fig.9 Macroscopic failure features of fabrics

Fig.10 Microscopic failure features of fabrics

Table 2 Mechanical property of projectile[24]

弹丸材料	密度ρ/(g·cm^-3)	弹性模量E/GPa	泊松比ν
钢	7.85	210	0.3

Table 3 Mechanical properties of Twaron yarn

参数	数值
密度ρ/(g·cm^-3)	1.44
1方向拉伸强度σ₁/GPa	2.4
1方向弹性模量E₁/GPa	75
2方向弹性模量E₂/GPa	0.75
3方向弹性模量E₃/GPa	0.75
1-2方向泊松比ν₁₂	0.3
1-3方向泊松比ν₁₃	0.3
2-3方向泊松比ν₂₃	0.4
1-2方向剪切模量G₁₂/GPa	2.4
1-3方向剪切模量G₁₃/GPa	2.4
2-3方向剪切模量G₂₃/GPa	1.2

Fig.11 Cross-sectional shape of yarn

Fig.12 1/4 model of numerical simulation system

Fig.13 Comparison of simulated and ballistic impact test results

Fig.14 Failure process of single-layer ZnO-modified fabric under 140m/s ballistic impact

Fig.15 Comparison between simulated and test macro results of ZnO-modified fabric under 140m/s ballistic impact

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