曲率半径对具有PELE效应的EFP成型影响分析

Analysis of Arc Curvature Radius Influence on Formation of EFP with PELE Effect

为提高弹药对轻型装甲的毁伤能力,提出一种内含低密度材料的新型弧锥结合药型罩。使用有限元软件LS-DYNA模拟EFP成型与侵彻的过程,分析了各曲率半径对EFP成型的影响规律。结果表明:所设计的药型罩可以形成具有PELE结构的EFP,药型罩外曲率半径取10～70 mm,装填物外曲率半径取30～60 mm,装填物内曲率半径取47～59 mm,药型罩内曲率半径取45～55 mm时EFP成形效果较好。优化得到的EFP在射入靶板时产生横向效应使其扩孔,并在穿透靶板后形成高速破片对目标内部二次毁伤。

In order to improve the ammunition damage to light armor, a novel arc-cone liner which contains the low density filler was proposed. Numerical simulations by LS-DYNA were used to research the forming and penetration of the EFP. The influence of arc curvature radius on the forming of EFP was analyzed. The result shows that the liner can form a covered EFP with PELE structure. When the outer arc curvature radius of liner is 10~70 mm, the outer arc curvature radius of filler is 30~60 mm, the inner arc curvature radius of filler is 47~59 mm, the inner arc curvature radius of liner is 45~55 mm, the EFP is formed with better performance. The optimized liner can create a lateral efficiency when it enters the target, and forming high-speed fragments in the target interior to form secondary damage when it penetrates the target.