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The Relation between Initial Yaw and Long Rod Projectile Shape after Penetrating an Oblique Thin plate

The effect of yaw on the ability of an eroding long rod projectile to penetrate oblique thin targets was investigated. Numerical simulations of an eroding long tungsten rod projectile penetrating an oblique thin steel plate target were conducted using the LSDYNA code with a user-written subroutine. The numerical results were found to agree with the experimental data. From the simulation results it may be concluded that following penetration of a thin target, for non-zero initial yaw values, the projectile nose bends toward the velocity vector, while for zero yaw the bending is negligible. In addition, for a non-zero initial yaw angle, the side of the projectile pointing in the direction of its velocity is damaged (this side is in greater contact with the target because of the velocity vector direction).