Zhou Yu, Li Guoju, Fan Qunbo, Wang Yangwei, Zheng Haiyang, Tan Lin, Xu Xuan
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.
National Key Laboratory of Science and Technology on Materials under Shock and Impact, Beijing 100081, China.
Materials (Basel). 2017 Apr 12;10(4):405. doi: 10.3390/ma10040405.
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.
通过实验和模拟研究了高速破片对30CrMnMo超高相对分子质量聚乙烯装甲的侵彻。对弹丸的分析表明，在侵彻初始阶段，弹丸头部处于非平衡状态，低速区域发生塑性变形。随后，弹丸的头部和尾部速度几乎相同，并一起波动。此外，钢板与聚乙烯（PE）层压板的有效结合导致在弹丸头部撞击层压板之前，PE吸收能量。这种早期吸收对复合装甲的弹道性能起到了积极作用。对内能和质量损失的进一步分析表明，PE层压板在侵彻初始阶段通过PE纤维的持续稳定破坏来吸收能量，并通过变形吸收能量直至完全侵彻。层压板吸收的能量占总能量吸收的68%，表明层压板在侵彻过程中的能量吸收中起主要作用。
