Penetration of concrete targets with deceleration-time measurements

• Published in: International journal of impact engineering 2003-05, Vol.28 (5), p.479-497
• Main Authors: Forrestal, M.J., Frew, D.J., Hickerson, J.P., Rohwer, T.A.
• Format: Article
• Language: English
• Subjects: Applied sciences; Building structure; Buildings. Public works; Concrete structure; Concrete targets; Construction (buildings and works); Deceleration-time measurements; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Inelasticity (thermoplasticity, viscoplasticity...); Penetration; Physics; Solid mechanics; Structural and continuum mechanics; Viscoelasticity, plasticity, viscoplasticity
• ISSN: 0734-743X; 1879-3509
• DOI: 10.1016/S0734-743X(02)00108-2

We conducted two sets of penetration experiments with concrete targets that had average compressive strengths of 23 and 39 MPa (3.3 and 5.7 ksi). The 76.2-mm-diameter, 530-mm-long, ogive-nose projectiles were machined from 4340 R C45 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 140 and 460 m/s. Measured penetration depths and deceleration-time data were analyzed with a previously published model. In addition, we compared the results of this study with results obtained from smaller diameter projectiles and this comparison suggested a projectile diameter scale effect.