Abstract
To reduce penetration effect of a shaped charge, powerful current effect on the shaped charge jet could be introduced. Based on numerical simulation within the framework of a model of the uniformly elongating cylindrical rod, the paper analyzes features of the metal shaped-charge jets stretching, when passing a powerful electric current pulse through them. Main attention is paid to the effect of jet material radial dispersion behind its exit from the interelectrode gap. The role of magnetic energy stored in the jet elements during exposure was clarified in this phenomenon. For the shaped-charge jet middle sections formed by charges with diameter of 50 to 150 mm, distributions along the jet radius of the material density and the material radial velocity were obtained immediately after the current “cutoff”. They indicated that as a result of current exposure, the jet material surface layer could be torn off and dissipated with maintaining continuity of its central part. With an increase in strength of the current passed through the jet, thickness of its destroyed layer acquiring radial velocity directed from the axis and increases. Critical currents corresponding to the jet surface layer breakdown and its complete destruction were determined.
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