AREA RULES FOR PENETRATING BODIES

Area rules are determined for the normal penetration of a projectile i nto a ductile target under conditions of the localized projectile-targ et interaction. Bodies of revolution and three-dimensional projectiles with a close shape and the same distribution of the cross-sectional a rea along the longitudinal axis are considered. It is shown that the d ifference in the ballistic limits of the bodies is of the order of eps ilon(2) where epsilon is the order of the difference in their shapes.