聚能射流对氧化铝陶瓷靶的侵彻特性研究

 建立了考虑损伤的求解靶板阻力的理论模型，以此来评估陶瓷靶板的抗侵彻能力；数值模拟了长杆弹侵彻氧化铝陶瓷靶的破坏特性，结合实验结果确定了氧化铝陶瓷本构模型中的材料参数。建立了聚能射流侵彻氧化铝陶瓷靶的计算模型，对射流的形成机理及氧化铝陶瓷靶的抗侵彻性能进行研究，讨论了药型罩的几何尺寸对所形成的射流速度及侵彻深度的影响。结果表明：药型罩的锥角和壁厚增大，射流速度减小，壁厚对射流速度梯度的影响较大；同样，药型罩的锥角对侵彻深度也有较大的影响。

Failure Characteristics of Alumina Penetrated by Shaped Charge Jet

A theory model to calculate the target resistance is established to evaluate the ballistic properties; the parameters used in the numerical simulations were determined by simulating the experiment of long rod penetration into alumina ceramic target; the theoretical model is proved to be reasonable by simulating the penetration of shaped charge jet into alumina ceramic. The impact of the geometric size of the shaped charge on the jet velocity and penetration results was studied. It can be concluded that the bigger the angle and the thickness of the shaped charge are, the lower the jet velocity is, and the impact of the thickness on the velocity gradient is severe; the angle of the shaped charge has a significant influence on the penetration depth.