This paper presents a continuum damage model for viscoelastic materials. “Damage” is expressed by two symmetric, second rank tensors which are related to the total areas of “active” and “passive” microcracks within a representative volume element of the multifractured material. Viscoelasticity is introduced through scalar valued internal state variables that represent the internal degrees-of-freedom associated with the motions of long chain polymeric molecules. The constitutive relations are established from basic considerations of continuum mechanics and irreversible thermodynamics, with detailed expressions derived for the case of initially isotropic materials. It is shown that damage causes softening of the material moduli as well as changes in material symmetry. The special cases of uniaxial damage under uniaxial stress and the interaction of damage with moisture diffusion are also considered.
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December 1988
Research Papers
A Continuum Damage Model for Viscoelastic Materials
Y. Weitsman
Y. Weitsman
Mechanics and Materials Center, Texas A&M University, College Station, TX 77843
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Y. Weitsman
Mechanics and Materials Center, Texas A&M University, College Station, TX 77843
J. Appl. Mech. Dec 1988, 55(4): 773-780 (8 pages)
Published Online: December 1, 1988
Article history
Received:
February 8, 1988
Revised:
July 20, 1988
Online:
July 21, 2009
Citation
Weitsman, Y. (December 1, 1988). "A Continuum Damage Model for Viscoelastic Materials." ASME. J. Appl. Mech. December 1988; 55(4): 773–780. https://doi.org/10.1115/1.3173721
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