Mj. Forrestal et al., PENETRATION OF GROUT AND CONCRETE TARGETS WITH OGIVE-NOSE STEEL PROJECTILES, International journal of impact engineering, 18(5), 1996, pp. 465-476
We conducted depth of penetration experiments into grout and concrete
targets with ogive-nose steel projectiles. Powder guns launched 0.064
kg, 12.9 mm diameter projectiles into grout targets with unconfined co
mpressive strengths of 13.5 MPa (2.0 ksi) and 21.6 MPa (3.1 ksi). For
the concrete targets, powder guns launched projectiles with length-to-
diameter ratios of 10; a 0.48 kg, 20.3 mm diameter rod, and a 1.60 kg,
30.5 mm diameter rod. Concrete targets had unconfined compressive str
ength of 62.8 MPa (9.1 ksi)for the 0.48 kg rods and unconfined compres
sive strength of 51.0 MPa (7.4 ksi)for the 1.60 kg rods. For these exp
eriments, penetration depth increased as striking velocity increased u
ntil nose erosion became excessive. Thus, we determined experimentally
the striking velocities corresponding to maximum penetration depths.
Predictions from a previously published model are in good agreement wi
th data until nose erosion becomes excessive. Copyright (C) 1996 Elsev
ier Science Ltd.