Effect of stretching-shearing coupling on instability-related delamination growth

Barry D. Davidson, Catherine H. Ferrie

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Results are presented from a combined theoretical and experimental investigation into the effect of stretching-shearing coupling on the buckling and growth of near-surface delaminated regions. Honeycomb sandwich laminates with graphite/epoxy face sheets containing preimplanted, through-width delaminations were tested in compression. Two layups were tested. Each layup contained delaminated regions with identical in-plane and flexural moduli; however, one layup exhibited stretching-shearing coupling, whereas the other did not. Delamination buckling was predicted using a cylindrical buckling analysis, and energy release rates and fracture mode ratios were obtained by a crack tip element analysis. Delamination growth was predicted using a linear, mixed-mode delamination growth law. Significantly different delamination buckling and growth strains were predicted for the two layups. Predicted delamination buckling and growth strains correlated well with experimental results.

Original languageEnglish (US)
Pages (from-to)383-392
Number of pages10
JournalComposite Structures
Volume29
Issue number4
DOIs
StatePublished - 1994

ASJC Scopus subject areas

  • Ceramics and Composites
  • Civil and Structural Engineering

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