An. Dancygier et Dz. Yankelevsky, HIGH-STRENGTH CONCRETE RESPONSE TO HARD PROJECTILE IMPACT, International journal of impact engineering, 18(6), 1996, pp. 583-599
High strength concrete (HSC) becomes more common in practice and may h
ave advantageous implementations. According to existing penetration fo
rmulae HSC is expected to enhance the performance of structural elemen
ts that are designed to resist projectile impacts. However, scabbing a
t the rear face is expected to be more severe in elements that are mad
e of HSC, because of the relatively high material brittleness. Therefo
re, it is important to enhance the ductility of HSC elements, and one
possible direction is to use fibers or wire mesh reinforcement. In ord
er to study the influence of the concrete strength and of the reinforc
ement type on the elements response, penetration tests were conducted
on regular strength concrete (RSC) and on HSC plates, with the followi
ng types of reinforcement: 5 mm steel mesh, steel fibers, small diamet
er steel wire mesh, and woven steel fence mesh of various diameters. T
he plates were subjected to an impact of a cylindrical hard steel proj
ectile, weighing 120 g, with a conical nose and a 1.5 aspect ratio. Th
e projectiles were accelerated by a Laboratory gas gun to velocities t
hat ranged between 85 and 230 m/sec, which were measured by an electro
-optical device. By comparing the response of these plates to an impac
ting projectile, the effects of concrete strength and of the reinforce
ment were studied. Major trends of the elements behavior were studied,
their responses were compared and are described herein. Copyright (C)
1996 Elsevier Science Ltd.