梯度层厚度对2024 Al/TC4层压复合材料抗侵彻性能的影响

Effect of Gradient Layer Thickness on Anti-penetration Properties of 2024 Al/TC4 Laminated Composites

摘要:

将梯度结构引入金属叠层靶板，通过有限元仿真对梯度结构与均匀层厚靶板进行抗侵彻模拟对比，并通过冲击实验验证分析。结果表明，梯度结构前端的高层厚及合适的Ti合金占比为子弹带来更大的冲击阻力，使弹头镦粗破损加剧，提升抗侵彻性能。此外，在冲击过程中，应力以波的形式在靶板各层透射和反射，压缩波与拉伸波相互作用使靶板产生非协同形变并导致分层。梯度靶板凭借更高的能量吸收率，消耗了子弹更多的动能，使得抗侵彻性能更进一步。本研究为梯度结构在金属叠层装甲中的应用提供了理论依据。

Abstract:

A gradient structure was introduced into a metal laminated target plate, and the anti-penetration simulation of the gradient structure was compared with that of a uniform-layer-thickness target plate by finite element simulation. The analysis was verified by an impact experiment. Results show that the high-level thickness and appropriate percentage of Ti alloy at the upper side of the gradient structure provide greater impact resistance against the bullet, which increases the warhead breakage and enhances the anti-penetration performance. In addition, during the impact process, the stress is transmitted and reflected in the form of waves in each layer of the target plate, and the interaction between the compression and tension waves causes non-synergistic deformation of the target plate and leads to delamination. The gradient target plate takes penetration resistance a step further through the higher energy absorption rate and more consumption of the bullet kinetic energy. This research provides a theoretical basis for the application of gradient structures in metallic laminated armor.