预扭转钨合金动能弹提高穿甲侵彻威力机理分析

PENETRATION MECHANISM OF PRE-TORQUED TUNGSTEN HEAVY ALLOY PROJECTILES

在力学性能和细观结构分析的基础上，提出了预扭转和未扭转钨合金材料在冲击条件下的变形和破坏机理。机理分析表明，预扭转后的钨合金弹体在同靶撞击过程中很容易形成由于绝热剪切失稳引起的破坏，从而使得弹体头部形成的“蘑菇头”面积小，弹体运动阻力小，因而具有更强的威力。并且存在一最佳扭转角，此时弹体具有最强的穿甲威力。穿甲实验结果证明了这一机理分析的正确性。

Deformation and failure mechanism of un-torqued and pre-torqued WHA projectiles was proposed. It appears that the presence of the matrix material has significant effect on the compressive dynamic properties of pre-torqued WHA.Deformation and failure mechanisms of pre-torqued WHA under compressive loading are suggested to explain the microstructural development. It is blieved that the ballistic performance of pre-torqued WHA is related to early localized failure caused by adiabatic shear. Ballistic testings of the two materials showed that the penetration performance of pre-torqued WHA has been improved significantly and there exists an optimal pre-torqued angle which is consistent with our analysis. Based on the mechanism, a projectile of more high performance is presented.