The effect of concrete target diameter on projectile deceleration and penetration depth

✍ Scribed by D.J. Frew; M.J. Forrestal; J.D. Cargile

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 287 KB
• Volume: 32
• Category: Article
• ISSN: 0734-743X
• DOI: 10.1016/j.ijimpeng.2005.01.012

✦ Synopsis

We conducted sets of experiments with three diameters of concrete targets that had an average compressive strength of 23 MPa (3.3 ksi) and 76.2-mm-diameter, 3.0 caliber-radius-head, 13-kg projectiles. The three target diameters were D ¼ 1:83; 1.37, and 0.91, so the ratios of the target diameters to the projectile diameter were D=d ¼ 24; 18, and 12. The ogive-nose projectiles were machined from 4340 R c 45 steel and designed to contain a single-channel acceleration data recorder. Thus, we recorded acceleration during launch and deceleration during penetration. An 83-mm-diameter powder gun launched the 13-kg projectiles to striking velocities between 160 and 340 m/s. Measured penetration depths and decelerationtime data were analyzed with a previously published model. We measured negligible changes in penetration depth and only small decreases in deceleration magnitude as the targets' diameters were reduced.