Modifying Combined Hemisphere-Cylinder Shaped-Charge Liners to Expand the Range of Velocity of the Obtained Compact Elements
S. V. Fedorov, I. A. Bolotina
Bauman Moscow State Technical University, Moscow, Russia
Keywords: explosion, shaped charge, high-velocity compact element, combined hemisphere--cylinder liner, degressive thickness, numerical simulation
Abstract
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 the two-dimensional axisymmetric problem of solid mechanics. The simulation was carried out for a 100 mm diameter shaped-charge charge with a copper liner. The jet-forming part of the liner had a degressive (decreasing from top to bottom) thickness, a hemispherical or semi-ellipsoidal shape outer surface, and a semi-ellipsoidal or semi-superellipsoidal inner surface. As a result of the calculations, the geometric parameters of combined liners to form 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.
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