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A model for anisotropic viscoelastic damage in composites

โœ Scribed by R.C. Pavan; B.F. Oliveira; S. Maghous; G.J. Creus

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
456 KB
Volume
92
Category
Article
ISSN
0263-8223

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โœฆ Synopsis

A model for continuous damage combined with viscoelasticity is proposed. The starting point is the formulation connecting the elastic properties to the tensor of damage variables. A hardening law associated with the damage process is identified from available experimental information and the rate-type constitutive equations are derived. This elastic damage formulation is used to formulate an internal variable approximation to viscoelastic damage in the form of a non-linear Kelvin chain. Elastic and viscoelastic equations are implemented into a finite element procedure. The code is verified by comparison with closed-form solutions in simplified configurations, and validated by fitting results of experimental creep tests.

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