Abstract
Constitutive equations are derived for the viscoelastoplastic response of glassy polymers at finite strains. The model combines the theory of temporary polymeric networks (in the version of a model of adaptive links) with the concept of semiaffine junctions. Viscoelasticity of polymers is modeled by breakage and reformation of adaptive links: (physical crosslinks and entanglements), whereas the viscoplastic phenomena are described by sliding of junctions with respect to a bulk medium. Thermodynamic potentials are proposed for nonaffine networks, and constitutive equations are developed using of the laws of thermodynamics. For uniaxial compression of a bar, fair agreement is demonstrated between results of numerical simulation and experimental data for polyethylene and poly(methyl methacrylate) during nonmonotonic loading.
| Original language | English |
|---|---|
| Pages (from-to) | 19-40 |
| Number of pages | 22 |
| Journal | Mathematical and Computer Modelling |
| Volume | 28 |
| Issue number | 11 |
| DOIs | |
| State | Published - 1 Dec 1998 |
| Externally published | Yes |
Keywords
- Constitutive equations
- Glassy polymers
- Temporary networks
- Viscoelasticity
- Viscoplasticity
ASJC Scopus subject areas
- Modeling and Simulation
- Computer Science Applications