Modifying Combined Hemisphere–Cylinder Shaped-Charge Liners to Expand the Velocity Range of the Resulting Compact Elements

The currently used shaped charges with combined hemisphere–cylinder liners allows obtaining compact steel elements with velocities of about 6 km/s. In this work, the possibility of modifying hemisphere–cylinder liners to expand the velocity range of the resulting compact elements was investigated by numerical simulation within the framework of a two-dimensional axisymmetric problem of continuum mechanics. The simulation was carried out for a 100 mm diameter shaped charge with a copper liner. The jet-forming part of the liner had a degressive (decreasing from apex to base) thickness, a hemispherical or semi-ellipsoidal outer surface, and a semi-ellipsoidal or semi-superellipsoidal inner surface. As a result of the calculations, the geometric parameters of the combined liners for the formation of compact elements of maximally possible mass with velocities of \(5{-}9.5\) km/s were selected. For an element with a velocity of about 9.5 km/s, the mass was about 5 g.