With increasing ballistic threat levels, there is ever more demand on developing ceramic armor designs with improved performance. This paper presents finite element simulations that investigate the performance of silicon carbide ceramic with steel 4340 backing material and titanium alloy, graphite as buffer layers when subjected to normal and oblique impacts by a tungsten alloy long rod projectile (LRP). Depth of penetration from experimental measurements is compared with simulations to confirm the validity of constitutive, failure model parameters. Titanium alloy cover plate and graphite interface weak layer laterally spread the impact shock away from the SiC tile and reduces the amplification of the stress accumulation at the front surface of the SiC tile. The dwelling time increases before it penetrates into ceramic armor. Further, using AUTODYN® numerical simulations detailed parametric study is carried out to identify the minimum areal density armor for a given ballistic limit velocity. The equivalent protection factor for the bi-layer armor is a simple function of the cosine of the angle of impact.

随着弹道威胁级别的提高，对开发具有改进性能的陶瓷装甲设计的需求越来越大。本文介绍了有限元模拟，研究了以 4340 钢背衬材料和钛合金、石墨作为缓冲层的碳化硅陶瓷在受到钨合金长杆弹丸 (LRP) 的正常和倾斜冲击时的性能。将实验测量的穿透深度与模拟进行比较，以确认本构失效模型参数的有效性。钛合金盖板和石墨界面薄弱层将冲击冲击横向分散到远离碳化硅砖的地方，减少了碳化硅砖前表面应力累积的放大。在渗入陶瓷装甲之前，停留时间会增加。进一步，使用 AUTODYN® 数值模拟进行详细的参数研究，以确定给定弹道极限速度的最小面密度装甲。双层装甲的等效保护系数是冲击角余弦的简单函数。