弹头形态对点阵金属陶瓷夹层结构侵彻效能的影响

张俊; 贾广臣; 徐国军

doi:10.13224/j.cnki.jasp.2020.01.001

弹头形态对点阵金属陶瓷夹层结构侵彻效能的影响

doi: 10.13224/j.cnki.jasp.2020.01.001

基金项目: 国家自然科学基金(51775329); 上海市科委创新行动计划(17050502000); 上海市临港管委会产学研合作项目(2017-056)

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出版历程
- 收稿日期: 2019-08-07
- 刊出日期: 2020-01-28

Effect of warhead shape on penetration into metal-ceramic lattice sandwich structure

College of Engineering Science and Technology,Shanghai Ocean University,Shanghai 201306,China

摘要

摘要: 提出了一种由金字塔型点阵金属骨架、陶瓷棒、环氧树脂胶结剂、金属面板及背板所组成的复合材料结构模型。基于有限元法,在实验验证数值方法有效性的基础上,模拟研究了该型复合结构对三类钢制弹丸(平头、球头和锥头)的抗侵彻机制。对比分析了弹靶模型各子结构的失效模式、吸能效率、弹丸的塑性变形、弹道特性、速度及加速度等变化规律。结果表明:弹头形态对复合靶板的破坏形态和吸能特性有较大影响,平头弹丸和球头弹丸对靶板主要产生冲塞破坏,达到峰值加速度的时间较短；而锥头弹丸主要表现为刺穿扩孔型破坏,达到峰值加速度的时间较长,侵彻效能最高。在弹体高速侵彻靶板的过程中,由于金属骨架的剪切扩孔和塑性变形、陶瓷棒的断裂破坏以及金属面板与背板的塑性变形,使得该型防护结构的抗侵彻能力得到了显著提高。
- 冲击动力学仿真 /
- 金属陶瓷复合材料 /
- 抗侵彻机理 /
- 金属骨架 /
- 点阵夹层结构
Abstract: A structural model of composite materials composed of the metal skeleton,ceramic rods, epoxy, front and back metal plates was proposed. Based on the finite element method, the validity of numerical method was proved by the available experiments. Then, anti-penetration mechanisms of the composite structures were simulated in the process of penetration with three types of steel projectiles (flat-warhead, hemispherical-warhead and conical-warhead). The sub-structures failure modes, energy absorption efficiency, plastic deformation, ballistic performances, velocities and accelerations of the projectiles target plate were analyzed. The results showed that the warhead shape had a great effect on the damage mechanisms and energy absorption characteristics. The flat-warhead and hemispherical-warhead projectiles mainly resulted in crushing damage to the target plate, and the peak acceleration time was shorter. However, the conical-warhead projectile penetration into the target plate mainly resulted in piercing and reaming. The peak acceleration time was greater and the penetration efficiency was the highest. During the projectile penetration, the shear hole and plastic deformation of the metal skeleton, the fracture of the ceramic rod and the plastic deformation of the metal front plate and the metal back plate significantly improved the anti-penetration ability of the structure.
- impact dynamics simulation /
- metal-ceramic composites /
- anti-penetration mechanism /
- metal skeleton /
- lattice sandwich structure

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