To solve the problem of insufficient protective performance of the existing body armor, an impact-resistant shear stiffening gel (SSG) with excellent flexibility and formability was innovatively used as buffer plate for body armor, and then combined with ultra-high molecular weight polyethylene (UHMWPE) ballistic panel to form a UHMWPE/SSG composite body armor. Based on the ballistic impact experiment and numerical simulation, the effect of buffer plate on the protective performance, and the dynamic behavior and protective mechanism of UHMWPE/SSG were analyzed systematically. The results indicated that the flexible SSG buffer plate could quickly stiffen under ballistic impact, thereby producing the strong “Jamming” effect to resist impact deformation and absorb impact energy. Moreover, the “Jamming” effect enhanced with the increase of impact load, and showed a distribution mode that weakened from the ballistic impact area to the periphery. Compared with traditional buffer materials, more impact energy was dispersed and absorbed by SSG, but less impact energy was transmitted to the human body. Therefore, the impact strength of UHMWPE/SSG on the human body and backface signature of human body were also significantly reduced (up to 50%), which showed that the composite body armor with SSG buffer material exhibited superior protective performance.

为解决现有防弹衣防护性能不足的问题，创新性地采用柔韧性和成型性优异的抗冲击剪切硬化凝胶（SSG）作为防弹衣的缓冲板，再与超高分子量聚乙烯（ UHMWPE) 弹道板形成 UHMWPE/SSG 复合防弹衣。基于弹道冲击实验和数值模拟，系统分析了缓冲板对防护性能的影响，以及UHMWPE/SSG的动力学行为和防护机制。结果表明，柔性SSG缓冲板在弹道冲击下能迅速变硬，从而产生强烈的“卡住”效应，以抵抗冲击变形和吸收冲击能量。此外，“干扰”效应随着冲击载荷的增加而增强，并呈现出从弹道影响区向外围减弱的分布模式。与传统缓冲材料相比，SSG分散和吸收的冲击能量更多，但传递给人体的冲击能量更少。因此，UHMWPE/SSG对人体的冲击强度和人体背面特征也显着降低（高达50%），表明具有SSG缓冲材料的复合防弹衣表现出优越的防护性能。