INFLUENCE OF THE HYPERVELOCITY DISK PROJECTILE ORIENTATION ON DAMAGE TO TARGET: NUMERICAL SIMULATION

Influence of orientation of the plate-like projectiles on their penetrating ability was studied numerically on model problems. Numerical simulation was performed using the 3-D SPH-code ELLPH, set-up was the following: titanium disk projectile, normal impact at velocity 10 km/s, 'thick' and spaced aluminium targets, inclination angle of the projectile to target varied from flat-wise impact to edge-wise impact. Impact of spherical aluminium, titanium and steel projectiles was simulated also to compare with. The final dimensions and volume of crater in the aluminium blocks were considered as indicators of the impact effectiveness. The most definite difference is obtained for the spaced target: effectiveness of the disk impact changes from nearly equal to that of aluminium spherical projectile for flat-wise impact to two fold greater than that of steel spherical projectile for edge-wise impact.