Cure-induced and thermal stresses in a constrained epoxy resin

Mikhail Merzlyakov, Gregory B. McKenna, Sindee L. Simon

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

We report results from a study of isotropic residual stress development for thermosetting resins during cure and subsequent thermal cycling. We use a recently developed thick-walled tube method to impose three-dimensional isotropic constraints on the resin. The strains at the outer surface of the thick-walled tube are monitored by strain gauges. Experiments are performed for a closed tube where the resin is cured in the compressive state and in an open tube where tensile stresses build up at gelation. The cure-induced tensile stresses are much lower than expected from cure shrinkage due to the inability of the curing resin to sustain large tensile stresses in the gel-state.

Original languageEnglish
Pages (from-to)585-591
Number of pages7
JournalComposites Part A: Applied Science and Manufacturing
Volume37
Issue number4
DOIs
StatePublished - Apr 2006

Keywords

  • A. Thermosetting resins
  • B. Residual/internal stress
  • D. Mechanical testing
  • Thermal pressure coefficient

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