侵彻力学的一种新理论分析方法

A NEW THEORETICAL MODEL FOR ARMOR-PIERCING MECHANICS

  • 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.

     

    Abstract: Penetration mechanics is important both as a scienceand in practice of military engineering. For a quasi-steady penetration of long rodprojectile into semi-infinite thick target, a simplified model isdeveloped, where the bullet incorporated mushroom head consists of unbrokenzone, crush zone and hole dilating zone, and the target consists of holedilating zone, crush zone and unbroken zone, with the strain rate effectbeingconsidered. A set of ODE is obtained through conservation laws of everypart. Through theoretical analysis and calculation, the influences of the crush strain rate, crash strength of the projectile and thestrain rate effect of the crash strength of the target on penetration depthare analyzed. The excellent agreement of the calculation results and theexperiment shows the effectiveness of the simplified model.

     

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