This study introduces a biomimetic ceramic composite armor system, composed of multilayered biomimetic ceramic tiles and fiber back-plates. The ballistic performance of the composite armor against T12A steel projectiles was investigated through experimental and numerical simulation studies. The experimental findings indicate that, while the biomimetic ceramic structure demonstrates weaker ballistic resistance compared to a monolithic ceramic of equal thickness, it effectively inhibits crack propagation, thereby enabling it to withstand the impact of multiple projectiles. Additionally, the interfacial effects within the layers of the biomimetic ceramic structure create a more chaotic stress field inside the T12A steel projectile, resulting in a higher degree of fragmentation of the projectile compared to penetration through monolithic ceramic. A three-dimensional numerical model was established to analyze the impact of projectile velocity and impact points on the ballistic performance of the biomimetic ceramic composite structure. Simulation results reveal that as the initial velocity of the projectile increases, the energy absorption efficiency of the biomimetic ceramic structure improves, whereas the energy absorption efficiency of the UHMWPE laminated board decreases. This phenomenon is associated with the failure mechanism of the UHMWPE laminated board transitioning from tensile failure to shear failure. Moreover, when the impact point is at the corner of the ceramic tile, the residual projectile head is sharper, and the remaining velocity of the projectile after penetrating the biomimetic ceramic composite structure is higher.

中文翻译：

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仿生陶瓷复合装甲的防弹性能：冲击动力学和结构响应的综合分析


本研究介绍了一种仿生陶瓷复合装甲系统，由多层仿生瓷砖和纤维背板组成。通过实验和数值模拟研究，研究了复合装甲对抗T12A钢弹的弹道性能。实验结果表明，虽然与同等厚度的整体陶瓷相比，仿生陶瓷结构的防弹性能较弱，但它有效地抑制了裂纹扩展，从而能够承受多个弹丸的冲击。此外，仿生陶瓷结构层内的界面效应在 T12A 钢弹丸内部产生了更加混乱的应力场，与穿透整体陶瓷相比，导致弹丸的破碎程度更高。建立三维数值模型，分析弹丸速度和弹着点对仿生陶瓷复合材料结构弹道性能的影响。仿真结果表明，随着弹丸初速的增大，仿生陶瓷结构的吸能效率提高，而UHMWPE层压板的吸能效率降低。这种现象与UHMWPE层压板的失效机制从拉伸失效转变为剪切失效有关。而且，当撞击点位于瓷砖的角部时，残留的弹头更锋利，弹丸击穿仿生陶瓷复合结构后的剩余速度更高。