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首页> 美国卫生研究院文献>Materials >Experimental and Numerical Investigation on the Perforation Resistance of Double-Layered Metal Shield under High-Velocity Impact of Armor-Piercing Projectiles
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Experimental and Numerical Investigation on the Perforation Resistance of Double-Layered Metal Shield under High-Velocity Impact of Armor-Piercing Projectiles

机译：双层金属屏蔽在盔甲孔径射孔高速冲击下的孔隙性抗性的实验性和数值研究

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摘要

In the case of protection of transportation systems, the optimization of the shield is of practical interest to reduce the weight of such components and thus increase the payload or reduce the fuel consumption. As far as metal shields are concerned, some investigations based on numerical simulations showed that a multi-layered configuration made of layers of different metals could be a promising solution to reduce the weight of the shield. However, only a few experimental studies on this subject are available. The aim of this study is therefore to discuss whether or not a monolithic shield can be substituted by a double-layered configuration manufactured from two different metals and if such a configuration can guarantee the same perforation resistance at a lower weight. In order to answer this question, the performance of a ballistic shield constituted of a layer of high-strength steel and a layer of an aluminum alloy impacted by an armor piercing projectile was investigated in experimental tests. Furthermore, an axisymmetric finite element model was developed. The effect of the strain rate hardening parameter C and the thermal softening parameter m of the Johnson–Cook constitutive model was investigated. The numerical model was used to understand the perforation process and the energy dissipation mechanism inside the target. It was found that if the high-strength steel plate is used as a front layer, the specific ballistic energy increases by 54% with respect to the monolithic high-strength steel plate. On the other hand, the specific ballistic energy decreases if the aluminum plate is used as the front layer.
机译：在保护运输系统的情况下，屏蔽的优化对于降低这些部件的重量并因此增加有效载荷或降低燃料消耗的实际兴趣。就金属屏蔽而言，基于数值模拟的一些研究表明，由不同金属层制成的多层构造可能是减少屏蔽重量的有希望的解决方案。但是，只有关于该主题的一些实验研究可用。因此，本研究的目的是讨论单层屏蔽是否可以用由两个不同金属制成的双层构型代替，并且如果这样的配置可以保证在较低的重量下相同的穿孔性。为了回答这个问题，在实验测试中研究了由一层高强度钢层构成的弹道屏蔽和由盔甲刺穿弹射射弹的铝合金的性能进行研究。此外，开发了轴对称有限元模型。研究了应变速率硬化参数C和Johnson-Cook组成型模型的热软化参数M的效果。数值模型用于了解目标内部的穿孔过程和能量耗散机制。发现，如果高强度钢板用作前层，则相对于单片高强度钢板，特定的弹道能量增加54％。另一方面，如果使用铝板用作前层，则具体的弹道能量会降低。

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