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Cohesive Finite Element Based Modeling of Damage in Composite Materials

[+] Author Affiliations
Rajesh S. Kumar

Georgia Institute of Technology, Atlanta, GA

Ramesh Talreja

Texas A&M University, College Station, TX

Paper No. IMECE2002-33575, pp. 11-19; 9 pages
doi:10.1115/IMECE2002-33575
From:
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • Applied Mechanics and Biomedical Technology
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Applied Mechanics Division
  • ISBN: 0-7918-3627-4 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME

abstract

Damage in composite laminates affects its overall viscoelastic response. Constitutive equations have been developed for composite laminates considering a fixed damage state. A complete description, however, requires suitable damage evolution laws. This paper is focused on studying damage evolution in viscoelastic laminates using a cohesive finite element approach. A two dimensional, four nodded finite element is developed incorporating a rate-independent traction-displacement cohesive law. This element is used in conjunction with plane strain bulk elements behaving in a linear viscoelastic manner to simulate crack evolution between two existing transverse cracks in symmetric cross-ply laminates. The effects of loading strain-rate, ply constraint and initial crack density are studied. This study shows expected trends in the behavior and indicates the suitability of cohesive zone modeling to study damage evolution in viscoelastic composite materials.

Copyright © 2002 by ASME

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