Some ballistic properties of non-homogeneous shields

High-speed penetration into non-homogenous (layered) targets is studied usi ng approximate models. Ballistic performance of two three-dimensional conic al impactors or thin impactors with the same longitudinal contours manufact ured from the same material and having the same lengths of nose and cylindr ical part is compared. It is demonstrated that when the ballistic performan ce of one of the impactors is better in penetrating a reference homogenous or non-homogenous shield then the same property remains valid for any other shield. (C) 1999 Elsevier Science Ltd. All rights reserved.