Soft-ballistic sub-laminate (SBSL) made from ultra-high molecular weight polyethylene (UHMWPE) fibers in [0/90] stacking sequence are the building block of a multi-layer soft-ballistic armor pack (SBAP, aka Soft Armor). A systematic study of the perforation dynamics of a single layer SBSL and several multi-layer SBAPs (2, 3, 4, 8, 16, 24, 32 layers) is presented for the first time in the literature. A previously validated finite element model of transverse impact on a single layer is used to study the perforation mechanics of multi-layer SBAPs with friction between individual layers. Following the classical definition of ballistic limit velocity, a minimum perforation velocity has been determined for free-standing single layer SBSL and multi-layer SBAPs. For the multi-layer SBAPs, complete perforations have been identified as progressive perforation of individual layers through the thickness. The minimum perforation velocities of multi-layer SBAPS is linear with the areal density for the eight (8) layer target and thicker. Large deformation behavior and perforation mechanics of the SBAPs is discussed in detail.

由超高分子量聚乙烯 (UHMWPE) 纤维以 [0/90] 堆叠顺序制成的软弹道子层压板 (SBSL) 是多层软弹道装甲包 (SBAP，又名 Soft Armor) 的组成部分. 文献中首次对单层 SBSL 和多个多层 SBAP（2、3、4、8、16、24、32 层）的射孔动力学进行了系统研究。先前已验证的单层横向冲击有限元模型用于研究多层 SBAP 的穿孔力学，其中各层之间具有摩擦力。遵循弹道极限速度的经典定义，已经确定了独立式单层 SBSL 和多层 SBAP 的最小穿孔速度。对于多层 SBAP，完整穿孔已被确定为通过厚度的各个层的渐进穿孔。多层 SBAPS 的最小射孔速度与八 (8) 层目标和更厚的目标面密度呈线性关系。详细讨论了 SBAP 的大变形行为和穿孔力学。