Some problems in the non-linear viscoelasticity of amorphous glassy polymers
β Scribed by L.C.E. Struik
- Book ID
- 115988011
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 910 KB
- Volume
- 131-133
- Category
- Article
- ISSN
- 0022-3093
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π SIMILAR VOLUMES
## Abstract Constitutive equations are derived for the nonlinear viscoelastic behavior of amorphous glassy polymers. The model is based on the theory of cooperative relaxation in a version of the trapping concept. Stressβstrain relations are applied to fit experimental data for polycarbonate in the
Non-elastic deformation of amorphous polymers was studied from strain recovery tests. In particular, a strain recovery master curve was built, which allowed estimation of the recovery times necessary to recover the whole non-elastic deformation. On such a curve, two non-elastic deformations, one ane
A non-linear viscoelastic model is introduced by employing a new formulation where the relaxation time of rate processes is directly dependent on the induced deformation state applied to the material. The plastic flow of amorphous polymers is considered as a continuous structural change, and the yie