Cyclic viscoelastoplasticity and low-cycle fatigue of polymer composites

A. D. Drozdov

Research output: Contribution to journalArticlepeer-review

57 Scopus citations

Abstract

Observations are reported on a polymer composite (polyamide-6 reinforced with short glass fibers) in tensile relaxation tests with various strains, tensile creep tests with various stresses, and cyclic tests with a stress-controlled program (ratcheting with a fixed maximum stress and various minimum stresses). Constitutive equations are developed in cyclic viscoelastoplasticity of polymer composites. Adjustable parameters in the stress-strain relations are found by fitting observations in relaxation tests and cyclic tests (16 cycles of loading-unloading). It is demonstrated that the model correctly predicts experimental data in creep tests and dependencies of maximum and minimum strains per cycle on number of cycles up to fatigue fracture of specimens. The influence of strain rate and minimum stress on number of cycles to failure is studied numerically.

Original languageEnglish
Pages (from-to)2026-2040
Number of pages15
JournalInternational Journal of Solids and Structures
Volume48
Issue number13
DOIs
StatePublished - 15 Jun 2011
Externally publishedYes

Keywords

  • Constitutive model
  • Cyclic deformation
  • Polymer composite
  • Viscoelasticity
  • Viscoplasticity

ASJC Scopus subject areas

  • Modeling and Simulation
  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics

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