Numerical Study of Failure Modes and Crack Propagation in 2A12 Aluminum Target Against Blunt-Nosed Projectile at Low Yaw Angle

摘要

Simulation models of 2A12 aluminum targets with thickness 1 mm stricken by the high strength 38CrSi blunt-nosed projectiles at different yaw angle have been established with the help of ABAQUS, then the failure mode and crack propagation of target was analyzed after the effectiveness of simulation models had been verified by experiment, also the motion and angle variation of projectile was studied. Simulation result indicated that target would experience staged deformation and destruction during impacting, three typical figures of plugs were obtained, and there was a special initial velocity of projectile which could change the extension of target's crack. For projectile, the trajectory deviation was observed, at the same time the trajectory angle and obliquity angle were increased, this phenomenon could be explained by the radial force between projectile and target, more details illustrated that initial yaw angle and velocity of projectile were two main factors to affect the motion of projectile.