Viscoelasticity, viscoplasticity, and creep failure of polypropylene/clay nanocomposites

A. D. Drozdov, A. L. Høg Lejre, J. de C. Christiansen

Research output: Contribution to journalArticlepeer-review

58 Scopus citations

Abstract

Observations are reported on polypropylene/clay nanocomposites in tensile tests with various strain rates, relaxation tests at various strains, and creep tests with various stresses at room temperature. New constitutive equations are derived in viscoelasticity and viscoplasticity of nanocomposites. Adjustable parameters are found by fitting the experimental data. The stress-strain relations are applied to the analysis of creep rupture. It is demonstrated that reinforcement of polypropylene with 1 wt.% of nanoclay induces an increase in time to failure by an order of magnitude.

Original languageEnglish
Pages (from-to)2596-2603
Number of pages8
JournalComposites Science and Technology
Volume69
Issue number15-16
DOIs
StatePublished - 1 Dec 2009
Externally publishedYes

Keywords

  • A. Nanocomposites
  • B. Creep
  • C. Modeling
  • D. Life prediction

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