摘要：进行了超高分子量聚乙烯(UHMWPE)平面层合板、平面夹芯结构以及球面夹芯结构的弹道侵彻实验研究，发现凸球面结构的抗侵彻能力低于平面结构，根据实验现象对球面结构初始曲率的不利影响作了初步分析。应用DYTRAN软件对不同曲率的UHMWPE层合板弹道侵彻进行了数值仿真，分析了层合板曲率对弹道性能的影响规律，认为曲率对层合板变形的限制作用以及由此导致的应力集中是造成抗侵彻能力下降的主要原因。

Abstract: Ultra-high molecular weight polyethylene (UHMWPE) laminate, plane sandwich and spherical sandwich are researched by ballistic penetration experiments, and lower anti-penetraion performance of convex spherical structure is found than that of plane structure. Disadvantage of initial curvature of spherical structure is elementarily analyzed based on experimental phenomena. Ballistic penetration of UHMWPE laminates with different curvature is numerically simulated by DYTRAN FEM software, and curvature influence on ballistic properties is analyzed. Main cause of ballistic performance degradation is considered to be deformation restriction and the induced stress concentration due to initial curvature.