Xf. Hou et W. Goldsmith, PROJECTILE PERFORATION OF MOVING PLATES - EXPERIMENTAL INVESTIGATION, International journal of impact engineering, 18(7-8), 1996, pp. 859-875
An experimental investigation was conducted to examine the normal impa
ct and perforation of blunt- and 60 degrees-conically-tipped 12.7 mm d
iameter hard-steel cylindrical projectiles on plates moving orthogonal
to their initial trajectory with three different speeds. By means of
an air or powder gun, these bullets were propelled at speeds ranging f
rom 50 to 1000 m/s against rotating annular disks of aluminum, steel a
nd polycarbonate. The impact process consisted of the two consecutive
phases of plugging and petaling, each of which comprises several separ
ate mechanisms. Terminal velocities, trajectory angles, crater lengths
, impact angles and penetration times for the three target materials w
ere obtained. Effects on these quantities of variations in material st
rength and thickness, and striker and target speed were determined. Th
e nature of the failure phenomenon was found to be dependent on the re
lationship between the rate of petal propagation and the rate of chang
e of the contact area between striker and target. Copyright (C) 1996 E
lsevier Science Ltd.