Effect of magnetic field of elongated solenoid on deformation of metal shaped-charge jets

Inertial stretching of a metal shaped-charge jet in the presence of magnetic field of elongated solenoid is analyzed. Effect of the magnetic field on the shaped-charge jet is aimed at inhibition of the development of plastic instability of the jet with an increase in its ultimate elongation and penetration capability. Several simplifying assumptions are used to obtain analytical description of electromagnetic processes in a fragment of the jet that moves inside and outside the solenoid. Induction heating of a fragment of the jet and the stress state therein are calculated with allowance for electromagnetic forces under the experimental conditions of the earlier experiments on the effect of the magnetic field of solenoid on shaped-charge jets. The results are used to substantiate the hypothesis on the possible reason for a relatively large difference between the experimental data of different authors on an increase in the penetration capability of shaped charges.