Modelling nonlinear viscoelasticity and damage in amorphous glassy polymers

A. D. Drozdov

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Constitutive equations are derived for the nonlinear viscoelastic behavior of amorphous glassy polymers in the subyield region. A polymer is thought of as an ensemble of cooperatively rearranged regions trapped in cages. In the phase space, a cage is modeled as a potential well, where a flow unit hops as it is thermally activated at random times. The viscoelastic response is treated as rearrangement of flow units. A rearrangement event occurs when a region reaches some liquid-like state in a hop. Damage of a polymer is modeled as breakage of van der Waals forces between monomeric units. It happens when the nominal strain in a relaxing region exceeds some threshold level. Stress-strain relations for a glassy polymer and a governing equation for the damage evolution are developed and verified by comparison with experimental data. Fair agreement is demonstrated between results of numerical simulation and observations for polycarbonate.

Original languageEnglish
Pages (from-to)883-893
Number of pages11
JournalMathematical and Computer Modelling
Issue number8-9
StatePublished - 9 Mar 2001
Externally publishedYes


  • Constitutive equations
  • Cooperative relaxation
  • Damage
  • Glassy polymers
  • Nonlinear viscoelasticity

ASJC Scopus subject areas

  • Modeling and Simulation
  • Computer Science Applications


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