Fading memory of deformation history in carbon black-filled thermoplastic elastomers

Necmi Dusunceli, Aleksey D. Drozdov

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Observations are reported on a carbon black–reinforced thermoplastic elastomer in multistep uniaxial tensile cyclic tests with a mixed deformation program (oscillations between maximum elongation ratios kmax and various minimum stresses σmin with kmax monotonically increasing with number of cycles n). Fading memory of deformation history is demonstrated: when specimens are subjected to two loading programs that differ along the first n −1 cycles of deformation and coincide afterwards, their stress–strain diagrams become identical starting from the nth cycle. A constitutive model is developed in cyclic viscoplasticity with finite deformations, and its adjustable parameters are found by fitting the observations. Ability of the stress–strain relations to describe the fading memory phenomenon and to predict the mechanical response of polymer composites in multi-step cyclic tests with large strains is confirmed by numerical simulation.

Original languageEnglish
Pages (from-to)1-12
Number of pages12
JournalPolymer Testing
Volume58
DOIs
StatePublished - 1 Apr 2017
Externally publishedYes

Keywords

  • Constitutive model
  • Cyclic deformation
  • Fading memory
  • Finite viscoplasticity
  • Thermoplastic elastomer

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

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