publication . Article . 2016

residual stresses created during curing of a polymer matrix composite using a viscoelastic model

J.T. Zhang; M. Zhang; S.X. Li; M.J. Pavier; D.J. Smith;
Open Access
  • Published: 17 Jun 2016 Journal: Composites Science and Technology, volume 130, pages 20-27 (issn: 0266-3538, Copyright policy)
  • Publisher: Elsevier BV
  • Country: United Kingdom
Abstract
Abstract A modified viscoelastic constitutive model is proposed to predict cure-induced residual stresses in polymer matrix composites. The modifications rely on using the inverse of the Deborah number to describe regimes corresponding to a fully relaxed state, a viscoelastic state and an elastic state. The composite is only in a viscoelastic state for limited ranges of the Deborah number. By considering the evolution of the Deborah number during curing of the AS4/3501-6 composite, the composite is in a fully relaxed state when it is cured at high temperature and the degree of cure is lower than 0.73, and no further changes in the viscoelastic characteristics wh...
Subjects
free text keywords: Curing, Finite element analysis(FEA), Polymer-matrix composites (PMCs), Viscoelastic constitutive model, General Engineering, Ceramics and Composites, Composite material, Deborah number, Shrinkage, Stress relaxation, Residual stress, Constitutive equation, Composite number, Viscoelasticity, Materials science, Elasticity (economics)
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publication . Article . 2016

residual stresses created during curing of a polymer matrix composite using a viscoelastic model

J.T. Zhang; M. Zhang; S.X. Li; M.J. Pavier; D.J. Smith;