Analysis of the Ballistic Performance and Mechanism of Soft Bulletproof Layers under the Impact of Multiple Lead Core Bullets

Abstract

The soft bulletproof layers as key protective component of a bulletproof vest against pistol bullets, are subject to multiple bullets in both the ballistic resistance test and the real combat. To analyze the influence of multiple impacts on the ballistic performance, the ballistic tests are conducted on the soft bulletproof layers. The ballistic performance of multiple ballistic impacts is compared in the same test condition, and the influence of mechanical properties of materials, boundary effects, angular effects and structural changes caused by impact are studied. It is concluded that the ballistic protection performance of the multiply structure of soft bulletproof layers not only depends on the ballistic protection and energy absorption performance of the single-layer fabrics, but also is closely related to the ballistic protection synergy between the soft bulletproof layers; from the perspective of fibers and single-layer fabrics, the ballistic protection and energy absorption are determined by main factors such as elastic modulus, tensile strength, strength of materials and breaking strain, which also have the coupling effects; for the structural design of multiple soft bulletproof layers against lead cored bullets, it is necessary to comprehensively study the influence of mechanical properties of the projectile and target materials, boundary effects, angular effects and structures & forms on the ballistic protection performance.