Cyclic viscoelastoplasticity and fatigue fracture of polymer composites

Aleksey D. Drozdov

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Observations are reported on isotactic polypropylene/nanoclay hybrids with various concentrations of filler ranging from 0 to 5 wt.% in cyclic tensile tests with a stress-controlled program (ratcheting between minimum stresses σ min and maximum stresses σ max). A pronounced effect of filler is demonstrated: reinforcement of polypropylene with 1 wt.% of nanoclay results in reduction of maximum and minimum strains per cycle by several times and growth of number of cycles to failure by an order of magnitude. To rationalize these findings, a constitutive model is developed in cyclic viscoelastoplasticity of polymer nanocomposites. Adjustable parameters in the stress-strain relations are found by fitting experimental data in relaxation tests and cyclic tests. It is demonstrated that the model correctly predicts growth of maximum and minimum strains per cycle with number of cycles and can be applied for evaluation of fatigue failure of nanocomposites.

Original languageEnglish
Title of host publicationComputational Plasticity XI - Fundamentals and Applications, COMPLAS XI
Pages1008-1019
Number of pages12
StatePublished - 1 Dec 2011
Externally publishedYes
Event11th International Conference on Computational Plasticity, COMPLAS XI - Barcelona, Spain
Duration: 7 Sep 20119 Sep 2011

Publication series

NameComputational Plasticity XI - Fundamentals and Applications, COMPLAS XI

Conference

Conference11th International Conference on Computational Plasticity, COMPLAS XI
Country/TerritorySpain
CityBarcelona
Period7/09/119/09/11

Keywords

  • Fatigue
  • Polymer/clay hybrids
  • Ratcheting
  • Viscoelastoplasticity

Fingerprint

Dive into the research topics of 'Cyclic viscoelastoplasticity and fatigue fracture of polymer composites'. Together they form a unique fingerprint.

Cite this