Cyclic viscoplasticity of semicrystalline polymers

A. D. Drozdov

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Observations are reported on three grades of isotactic polypropylene in uniaxial cyclic tensile tests with various maximum strains. Constitutive equations are derived for the viscoplastic behavior of a semicrystalline polymer. A characteristic feature of the model is that the rate-of-strain tensor for plastic flow is split into the sum of two components, one of which is proportional to the deviator of the stress tensor, while the other is proportional to the rate-of-strain tensor. The stress-strain relations involve four adjustable parameters that are found by fitting the experimental data. Numerical simulation demonstrates that the model correctly predicts the mechanical response of semicrystalline polymers in cyclic tests.

Original languageEnglish
Pages (from-to)28-31
Number of pages4
JournalMechanics Research Communications
Volume37
Issue number1
DOIs
StatePublished - 1 Jan 2010
Externally publishedYes

Keywords

  • Constitutive equations
  • Cyclic deformation
  • Isotactic polypropylene
  • Viscoplasticity

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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