Research on the Damaging Ability of EFP Warhead at Different Incidence Angle

Using LS-DYNA simulation software, we studied the relationship of the EFP's damaging ability with the penetration incidence angle of explosively formed projectile (EFP). It was found that, with the incidence angle changing from 0 to 40, the depth of vertical penetration of EFP reduced 34.2%, and the pore size of openings increased 18.2%. During the penetration, the head velocity of EFP changed as lines with time, and with the incidence angle increasing, the head velocity of EFP decreased more quickly. At first, the depth of vertical penetration of EFP changed as lines with time, then it showed slow upward trend. The relationship between penetration parameters and time was consistent under different penetration incidence angles. Based on 0 penetration theory of EFP and oblique penetration theory of rod projectile, according to fitting curve of simulation, the correction formula of depth of vertical penetration of EFP and angle was obtained.