Cyclic viscoplasticity of high-density polyethylene: Experiments and modeling

A. D. Drozdov, J. de C. Christiansen

Research output: Contribution to journalArticlepeer-review

58 Scopus citations

Abstract

Observations are reported on high-density polyethylene in uniaxial cyclic tensile tests. Two deformation programs are considered. In tests with a strain-controlled program, each cycle of deformation involves tension up to a maximum engineering strain ε{lunate}max and retraction down to the zero stress. In tests with a stress-controlled program, any cycle of deformation consists of tension up to a maximum engineering stress σmax and retraction down to some minimum engineering stress σmin. The study focuses on low-cycle programs with a constant cross-head speed and small strains. A constitutive model is derived in viscoplasticity of semicrystalline polymers at isothermal three-dimensional cyclic deformations. Material constants in the stress-strain relations are found by fitting the experimental data. Good agreement is demonstrated between the observations and the results of numerical analysis. Some interesting phenomena are revealed by means of numerical simulation of cyclic deformations.

Original languageEnglish
Pages (from-to)465-480
Number of pages16
JournalComputational Materials Science
Volume39
Issue number2
DOIs
StatePublished - 1 Apr 2007

Keywords

  • Constitutive modeling
  • Cyclic deformation
  • High-density polyethylene
  • Viscoplasticity

ASJC Scopus subject areas

  • General Computer Science
  • General Chemistry
  • General Materials Science
  • Mechanics of Materials
  • General Physics and Astronomy
  • Computational Mathematics

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