氧化锌改性芳纶织物的抗弹道冲击性能的数值模拟

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.