陶瓷复合装甲优化设计及弹击后剩余弯曲强度

根据防护要求和防护机制，设计了一种C/C-SiC陶瓷/铝基复合泡沫复合装甲。在确保复合装甲面密度为44 kg/m²的前提下，以弹击后剩余弯曲强度为评价标准，以陶瓷板布置位置、各组成层厚度、泡沫金属中泡沫孔径尺寸为研究因素，设计了三因素三水平的正交模拟优化方案，利用有限元软件ABAQUS模拟了子弹侵彻陶瓷靶板的过程及弹击损伤后复合装甲的弯曲实验过程，预测了剩余弯曲强度，并进行了结构优化。根据数值模拟结果制备陶瓷复合装甲试样，进行实弹打靶和弯曲实验以验证复合装甲试样剩余弯曲强度。结果表明，以MIL-A-46103E Ⅲ类2A级为防护标准，剩余弯曲强度最高的陶瓷复合装甲最优化结构形式为：陶瓷板厚度12 mm、陶瓷板做防弹面板、Al基复合泡沫孔径为4 mm+10 mm的混合；对剩余弯曲强度的主次影响因素排序为：陶瓷板厚度>陶瓷板布置位置>Al基复合泡沫孔径。

Optimum design of ceramic composite armor and residual bending strength after projectile impact

According to the protection requirements and protection mechanism, a C/C-SiC ceramic/Al-based foam metal composite armour was designed. Under the premise that the surface density of the composite armor was ensured to be 44 kg/m2, the residual bending strength after bullet's striking was used as the evaluation standard. The arranged position of the ceramic plate, the thickness of each bulletproof layer and the pore size in the foam metal were the research factors. The orthogonal simulation optimization scheme of three factors and three levels was designed. The numerical simulation of bullet penetration into the ceramic target plates and compression experiment of the composite armors with ballistic damage was carried out by using the finite element software ABAQUS. The residual bending strength of the designed composite armors was predicted and the structure was optimized. The ceramic composite armor samples were prepared according to the numerical simulation results, and the live shooting and bending experiments were carried out to verify their residual bending strength. The results show that the optimum structural form of the ceramic composite armor with the highest residual bending strength based on the MIL-A-46103E protection standard class III 2A is: The thickness of ceramic plate is 12 mm, the ceramic plate is laid out on the bulletproof surface, and the Al-based composite foam has a mixed pore size of 4 mm+10 mm. The order of primary and secondary factors affecting residual bending strength is: Ceramic plate thickness > ceramic plate location > Al-based composite foam pore size.