Abstract Due to their capability to form high velocity elements, explosive launching devices are used for testing objects of rocket and space technology on anti-meteoric resistance. These devices include shaped charges with a combined hemisphere-cylinder liner. Currently used shaped charges with a hemisphere-cylinder liner can produce compact steel elements with velocities of 6 km/s. Based on numerical simulation in the framework of the two-dimensional axisymmetric problem of continuum mechanics, the possibilities of increasing the velocity of compact metal elements formed by shaped charges with a combined hemisphere-cylinder liner up to 9 … 10 km/s are considered. Simulation has been performed for a 100 mm diameter shaped charge with a copper liner. The stated goal has been achieved by giving the jet-forming hemispherical part of the liner a degressive (decreasing from the top to the base) thickness with a change in its shape from hemispherical to semi-ellipsoid. As a result of calculations, liners geometric parameters have been selected to form compact elements of maximum possible mass with velocities in the range from 5 to 9.5 km/s. For an element with a velocity of about 9.5 km/s, the mass was about 5 g.
Highlights Combined hemisphere-cylinder liners can be used to produce high-speed elements. Degressive thickness of the hemispherical liner allows you to increase the jet speed. Semi-ellipsoid liner of degressive thickness allows controlling the jet parameters. The kinetic energy of compact elements remains constant up to a speed of 8 km/s. The element mass is about 5 g at a speed of 9.5 km/s for the 100 mm charge diameter.
Combined hemisphere-cylinder shaped-charge liner optimization for high-velocity metal fragments formation in anti-meteoroid resistance tests
Acta Astronautica ; 180 ; 149-154
2020-12-12
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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