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力学与实践 ›› 2009, Vol. 31 ›› Issue (2): 22-26.doi: 10.6052/1000-0992-2007-511

• 应用研究 • 上一篇    下一篇

侵彻力学的一种新理论分析方法

李永池 吴立朋 罗春涛   

  1. 中国科学技术大学力学和机械工程系,合肥,230027
  • 收稿日期:2007-11-12 修回日期:2008-06-10 出版日期:2009-04-08 发布日期:2009-04-08

A NEW THEORETICAL MODEL FOR ARMOR-PIERCING MECHANICS

  • Received:2007-11-12 Revised:2008-06-10 Online:2009-04-08 Published:2009-04-08

摘要: 对穿甲弹准定常侵彻半无限厚靶 板的问题,提出了一个考虑应变率效应的包括带有蘑菇头的未碎弹体、弹的破碎及扩孔区、 靶的破坏和扩孔区的简化侵彻模型. 通过侵彻过程中简化模型各部分的力学守恒定律,得到 了侵彻问题的简化常微分方程组,并以分析和数值计算相结合的方法分析了弹、靶强度的应 变率效应及弹破碎应变的应变率效应对侵彻效果的影响. 数值计算结果跟实验结果对比基本 一致.

关键词: 穿甲弹 侵彻 简化力学模型 应变率效应

Abstract: Penetration mechanics is important both as a science and in practice of military engineering. For a quasi-steady penetration of long rod projectile into semi-infinite thick target, a simplified model is developed, where the bullet incorporated mushroom head consists of unbroken zone, crush zone and hole dilating zone, and the target consists of hole dilating zone, crush zone and unbroken zone, with the strain rate effect being considered. A set of ODE is obtained through conservation laws of every part. Through theoretical analysis and calculation, the influences of the crush strain rate, crash strength of the projectile and the strain rate effect of the crash strength of the target on penetration depth are analyzed. The excellent agreement of the calculation results and the experiment shows the effectiveness of the simplified model.

Key words: armor-piercing bullet, penetration, simplified mechanical model, strain rate effect