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Ballistic Damage Evaluation of Thick-Section S-2 Glass/SC15 Composites With and Without Predefined Delaminations

[+] Author Affiliations
Bazle A. Gama, Mostafezur Rahman, Chris P. R. Hoppel, John W. Gillespie, Jr.

University of Delaware

Paper No. IMECE2004-60606, pp. 11-15; 5 pages
doi:10.1115/IMECE2004-60606
From:
  • ASME 2004 International Mechanical Engineering Congress and Exposition
  • Materials
  • Anaheim, California, USA, November 13 – 19, 2004
  • Conference Sponsors: Materials Division
  • ISBN: 0-7918-4712-8 | eISBN: 0-7918-4178-2, 0-7918-4179-0, 0-7918-4180-4
  • Copyright © 2004 by ASME

abstract

Thick-section composites made from plain weave (5×5) S-2 glass fabrics and toughened API epoxy SC15 resin are impacted with right circular cylinder projectiles at different impact velocities, and at support span of diameter 101.6-mm. The impact and residual velocity of the projectiles are measured using flash X-Ray. Ballistic energy dissipated in the composite plates is determined following an energy balance approach. The damage mechanisms under ballistic impact are evaluated by sectioning each composite plate through the impact axis. Composite damage mechanisms are presented as a function of dimensionless impact and residual velocity, VI /V50 and VR /V50 , respectively. It has been identified that the damage mechanisms are significantly different in case of partial-penetration (VR /V50 =0), than the case of complete-penetration (VR /V50 0). The effect of pre-defined delamination planes on the ballistic limit and damage is investigated.

Copyright © 2004 by ASME

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