ISSN: 0884-6804
Page Count: 12

A Damage Evolution Model for Viscoelastic Composite Laminates
Brinson, LC
Associate professor, Northwestern University, IL

Akshantala, NV
Postdoctoral fellow, Northwestern University, IL

(Received 13 July 1999; accepted 19 September 2000)

Abstract

A damage model for polymeric composite laminates operating at elevated temperatures is proposed. Viscoelastic behavior of the material is accounted for via the correspondence principle, and a variational approach is adopted to compute the temporal stresses within the laminate. Also, the effect of physical aging on ply level stress and on overall laminate behavior is included. An important feature of the model is that damage evolution predictions for viscoelastic laminates can be made. This allows us to track the mechanical response of the laminate up to large load levels, though within the confines of linear viscoelastic constitutive behavior.

Keywords:
damage evolution, viscoelastic, polymeric, composite laminate, correspondence principle, temporal stress, linear viscoelastic constitutive behavior, physical aging

Paper ID: CTR10907J
DOI: 10.1520/CTR10907J
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