Viscoelastoplasticity of amorphous glassy polymers

Aleksey D. Drozdov

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Constitutive equations are derived for the viscoelastoplastic response of glassy polymers at isothermal loading with small strains. An amorphous polymer is treated as an ensemble of plastic flow units (at the meso-level), each of which consists of a number of cooperatively rearranging regions (at the micro-level). In the phase space, a rearranging region is modeled as a point trapped in a cage (potential well), where it hops to higher energy levels. Rearrangement occurs when the relaxing region reaches (in a hop) some liquid-like energy level, whose position with respect to the energy landscape is determined by the intensity of plastic strains in the flow unit. Stress-strain relations for a solid polymer are derived using the laws of thermodynamics. Adjustable parameters in the model are found by fitting observations for three kinds of epoxy glasses and high-density polyethylene. A fair agreement is demonstrated between the experimental data and the results of numerical simulation.

Original languageEnglish
Pages (from-to)2063-2074
Number of pages12
JournalEuropean Polymer Journal
Volume36
Issue number10
DOIs
StatePublished - 1 Oct 2000
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Materials Chemistry
  • Polymers and Plastics
  • Organic Chemistry

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