Simulation research of the enhancement effect on shaped-charge jet by using axial magnetic fields

The electromagnetic enhancement of metal shaped-charge jet mainly depends on growth in the effective length under axial strong magnetic fields. This paper uses the finite element software LS-DYNA to simulate the formation process of the shaped-charge jet and the deformation part after that, by which the parameters and shape characters are obtained. Then a 3D model is created in ANSOFT according to the parameters attained before and a strong axial magnetic field is applied to it by energizing a driving coil in the simulation software. After analyzing the stress distribution and elongation of the shaped-charge jet can be reached when the magnetic field level is above 10T. The homogeneous deformation stage of the jet is extended and the “necking” process is slowed down by the radial electromagnetic force, which leads to an impressive increase in the effective length of the shaped-charge jet.