Multi-cycle deformation of silicone elastomer: Observations and constitutive modeling with finite strains

A. D. Drozdov, S. Clyens, N. Theilgaard

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Observations are reported on a medical grade of silicone elastomer in uniaxial tensile tests up to breakage of specimens, short-term relaxation tests, and cyclic tests with monotonically increasing maximum elongation ratios. Experimental data in cyclic tests demonstrate the fading memory phenomenon: stress-strain diagrams for two specimens with different deformation histories along the first n-1 cycles and coinciding loading programs for the other cycles become identical starting from the nth cycle. A constitutive model is developed in cyclic viscoplasticity of elastomers with finite strains, and its adjustable parameters are found by fitting the experimental data. Ability of the stress-strain relations to predict the mechanical response in cyclic tests with various deformation programs is confirmed by numerical simulation.

Original languageEnglish
Pages (from-to)2061-2074
Number of pages14
JournalMeccanica
Volume48
Issue number8
DOIs
StatePublished - 1 Oct 2013
Externally publishedYes

Keywords

  • Constitutive modeling
  • Cyclic viscoplasticity
  • Fading memory
  • Finite deformations
  • Silicone elastomer

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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