Bore-center annular shaped charges with different liner materials penetrating into steel targets

The bore-center annular shaped charge (BCASC) is a new type of shaped charge which can generate a larger-diameter hole in steel targets than classical shaped charges. In this paper, the influence of three liner materials, i.e. molybdenum, nickel and copper, on BCASC formation and penetrating into steel targets was investigated by experiment and numerical simulation. The simulation results were well consistent with the experimental results. This study showed that, at 0.50D standoff distance, the axial velocity of the molybdenum projectile was lower than that of the nickel and copper projectiles. The nickel and copper projectiles had almost the same head velocity. The absolute values of the radial velocity of the molybdenum projectile head was lower than that of the nickel and copper projectiles. However, at 0.75D standoff distance, the absolute values of the radial velocity of the molybdenum projectile head became much greater than that of the nickel and copper projectile heads. The projectile formed by BCASC with the molybdenum liner had the highest penetration depth of 61.5 mm, which was 10.0% and 21.3% higher than that generated by the copper and nickel projectiles.