细长薄壁弹体撞击钢靶屈曲的数值分析

Numerical study on dynamic plastic buckling of deep penetrating projectile

1.
Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China

摘要: 动能深侵彻弹攻击坚硬目标时，可能会引起弹体的屈曲而导致战斗部的破坏。采用LS-DYNA3D软件，对细长薄壁弹体撞击中厚钢板的屈曲破坏进行了数值研究。数值模拟再现了各型弹体在不同撞击情形下的屈曲破坏过程，证明了实验观察得到的长、短型弹体动塑性屈曲破坏存在轴向皱褶型和轴向外翻撕裂型两种基本模式，相应的屈曲破坏存在不同的特征过载曲线。给出了相关的屈曲破坏机动场描述和比实验结果更丰富的过程分析。
- 爆炸力学 /
- 动塑性屈曲 /
- 数值模拟 /
- 钻地弹 /
- 侵彻/穿甲 /
- 钢靶
Abstract: The present paper conducts a numerical study on the dynamic plastic buckling of deep penetrating projectiles. Numerical simulations display the different processes of failure and destruction of projectiles with LS-DYNA3D. It confirms that, two failure modes, i.e., crapy buckling and dynamic expansion buckling exist for different length-diameter-ratio projectiles, which have observed in the experimental study. Characteristic acceleration curves correspond to different modes of buckling failure. Two kinetic fields of rigid-plastic three-hinges are constructed to describe the two modes of buckling failure.
- mechanics of explosion /
- dynamic buckling /
- numerical simulation /
- projectile /
- penetration/perforation /
- steel target