Features of Metal Shaped Charge Jet Deformation in Longitudinal Low-Frequency Magnetic Field

The influences of a longitudinal axis-symmetric magnetic field on a metal, shaped charge jet stretching are considered. Magnetic fields were varied in time to allow for diffusion into the jet material. Theoretical investigations have shown that jet stretching with a diffused magnetic field is accompanied by magnetic field compression inside the jet, resulting in the appearance of radially stretching electromagnetic forces. As the plastic instability on the jet develops, the localization of these forces occurs at the neck region, which stabilizes jet stretching and results in increasing its effective length and penetration. The ratio of mechanical to electromagnetic forces in a jet at different external magnetic field intensity levels has been found. Laboratory test data are presented in which long, multi-looped solenoids were used instead of jet motion. The maximum increase in penetration depth of up to 10% is observed when changing the magnetic field induction from 1 to 10 T.