A MODIFIED VIRTUAL ORIGIN MODEL FOR SHAPED CHARGE JET PENETRATION WITH NON-UNIFORM DENSITY DISTRIBUTION

Document Type : Original Article

Author

Egyptian Armed Forces.

Abstract

ABSTRACT
The penetration of a shaped charge jet is studied in this paper where the jet density
deficit is considered. The virtual origin model, which assumes a constant jet density,
is modified to include the situation when the jet density deficit causes non-uniform jet
density distribution. A relation between the relative density ratio and normalised jet
velocity is proposed, based on which an analytical solution of the modified virtual
origin model is obtained. The validity of the modified virtual origin model is
demonstrated by its largely improved predictions in comparison with experimental
and numerical results. It shows that the density deficit term reduces the penetration
depth by 19.4%, 12.5% and 12.8% for the un-sintered copper-tungsten powder jet,
the solid zirconium jet and the solid copper jet, respectively.

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