Study on Formation of EFP with Fins of Hexagonal Liner

Abstract In order to further improve the flight stability of explosively formed projectile, formation method tail EFP was studied based on polygonal liner. Under hexagonal charge structure, fins can be when structural parameters are matched. Through numerical simulation LS-DYNA, influence liner (curvature radius, linear thickness), height and shell thickness velocity, length-diameter ratio, compactness wing-diameter ratio analyzed. make performance better, optimal range radius curvature R hexagon is 0.75D ~ 0.85D, t 0.05D 0.06D, L 0.8D 1.0D, h 0.06D 0.1D.