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Study on Protection Mechanism of 30CrMnMo-UHMWPE Composite Armor

机译：30CrMnMo-UHMWPE复合装甲防护机理研究

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The penetration of a 30CrMnMo ultra-high molecular weight polyethylene armor by a high-speed fragment was investigated via experiments and simulations. Analysis of the projectile revealed that the nose (of the projectile) is in the non-equilibrium state at the initial stage of penetration, and the low-speed regions undergo plastic deformation. Subsequently, the nose-tail velocities of the projectile were virtually identical and fluctuated together. In addition, the effective combination of the steel plate and polyethylene (PE) laminate resulted in energy absorption by the PE just before the projectile nose impacts the laminate. This early absorption plays a positive role in the ballistic performance of the composite armor. Further analysis of the internal energy and mass loss revealed that the PE laminate absorbs energy via the continuous and stable failure of PE fibers during the initial stages of penetration, and absorbs energy via deformation until complete penetration occurs. The energy absorbed by the laminate accounts for 68% of the total energy absorption, indicating that the laminate plays a major role in energy absorption during the penetration process.
机译：通过实验和模拟研究了30CrMnMo超高分子量聚乙烯铠装被高速碎片穿透的情况。弹丸的分析表明，（弹丸）的鼻子在穿透初期处于非平衡状态，低速区域发生塑性变形。随后，射弹的鼻尾速度实际上是相同的并且一起波动。此外，钢板和聚乙烯（PE）层压板的有效结合导致正好在弹头撞击层压板之前，PE吸收了能量。这种早期吸收对复合装甲的弹道性能起积极作用。对内部能量和质量损失的进一步分析表明，PE层压板在渗透的初始阶段通过PE纤维的连续且稳定的破坏吸收能量，并通过变形吸收能量直至发生完全的渗透。层压板吸收的能量占总能量吸收的68％，这表明层压板在渗透过程中在能量吸收中起主要作用。

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