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Punch Shear Damage Behavior of Composite Laminates With and Without Pre-Defined Delaminations

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

University of Delaware

Paper No. IMECE2004-61004, pp. 405-410; 6 pages
doi:10.1115/IMECE2004-61004
From:
  • ASME 2004 International Mechanical Engineering Congress and Exposition
  • Aerospace
  • Anaheim, California, USA, November 13 – 19, 2004
  • Conference Sponsors: Aerospace Division
  • ISBN: 0-7918-4700-4 | eISBN: 0-7918-4178-2, 0-7918-4179-0, 0-7918-4180-4
  • Copyright © 2004 by ASME

abstract

Punch shear tests have been proven to simulate most of the damage mechanisms observed under ballistic impact. A phenomenological model has been developed to quantify the elastic and absorbed energies as a function of displacement during punch. This model is used to quantify the damage mechanisms of thick-section composites as a function of displacement, and number of pre-defined delamination planes. It has been identified that different damage mechanisms as a function of displacement can be correlated with the load-displacement curve of punch shear tests. Three significant damage mechanisms are identified. Energy absorbed by these damage mechanisms are partitioned and quantified for a thick-section composite made from plain-weave S-2 glass and toughened API epoxy SC15 resin. The effect of pre-defined delamination planes on energy absorption and damage mechanisms are also quantified.

Copyright © 2004 by ASME

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