碳化钨长杆体侵彻半无限钢靶的特性研究

Study on Characteristic of Tungsten-carbide Long-rod Penetrating Into Semi-infinite Steel Target

为设计一种新的组合结构杆式侵彻体,在着靶速度800～1 400 m/s段对碳化钨长杆体垂直侵彻半无限钢靶的侵彻特性进行了研究.采用有限元程序AUTODYN和自定义强度的碳化钨本构模型,进行了与实验相对应的数值仿真,模拟计算得到的侵彻深度和弹坑形状与实验结果符合良好.进一步分析了碳化钨长杆体侵彻半无限钢靶的过程,得到了不同着靶速度下的杆体质量和侵深随侵彻作用时间的变化规律.结果表明,碳化钨杆体单位侵深所消耗的杆体质量低速段小于高速段,为组合结构杆式侵彻体的设计提供了依据.

To design a new composite rod penetrator,the penetration characterizatic of tungsten carbide long-rod normally penetrating into semi-infinite steel targets at the impact velocity from 800 m/s to 1 400 m/s was researched.The numerical simulations corresponding with the experiments were performed by customizing-strength constitutive-model coupled in AUTODYN finite element code.Both the penetration depth and crater shape calculated by the simulations are in good agreement with the experimental results.Further analyses of the penetration process of tungsten carbide long-rod normally penetrating into semi-infinite steel targets were carried out.The change rules of the rod-mass and penetration depth with the penetration time at different impact velocities were obtained.The result shows that the consumed rod-mass relative to penetration depth of the low-velocity tungsten-carbide rod is less than that of the high-velocity rod.The analysis results provide a basis for the design of the composite rod penetrator.