A model developed by Mileiko et al. [J. Appl. Mech. Tech. Phys. 5 (198
1) 711-713; Theor. Appl. Fracture Mech. 21 (1994) 9-16] describing a h
igh speed penetration of an impactor into a ductile target is generali
zed. (C) 1998 Elsevier Science Ltd. All rights reserved.