Cure-cycle simulations of composites with temperature- and cure-dependent anisotropic viscoelastic properties and stochastic delaminations

Research output: Contribution to journalArticlepeer-review

Abstract

Complete three-dimensional, anisotropic, nonhomogeneous degree of cure, temperature- and time-dependent nonlinear thermal properties, and Unear viscoelastic constitutive relations are formulated to describe composites during curing processes in autoclaves. Specific temperature, degree of cure, and stress profiles are determined for two distinct fiber orientations and two thicknesses by time-dependent finite-element analyses. Expressions for the probability of times to delaminate during cure under combined stresses are derived. Delamination onset survival times of laminated composites in the autoclave during manufacture are investigated in detail, and their dependence on temperature and thickness is shown. Specific areas are identified where critically needed deterministic and stochastic experimental data for thermal, viscoelastic, and failure properties during manufacturing cycles are unavailable.

Original languageEnglish (US)
Pages (from-to)81-101
Number of pages21
JournalMechanics of Composite Materials and Structures
Volume5
Issue number1
DOIs
StatePublished - 1998

ASJC Scopus subject areas

  • Ceramics and Composites

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