The fatigue growth of internal delaminations under compressive loading of cross-ply composite plates

Assimina A. Pelegri, George A. Kardomateas, Basharat U. Malik

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

This study focuses on the mode dependence of delamination growth under cyclic compressive loads in cross-ply composite plates. The model proposed makes use of an initial postbuckling solution derived from a perturbation procedure. A mode-dependent crack growth criterion is introduced. Expressions describing the fatigue crack growth are derived in terms of the distribution of the mode adjusted energy release rate. The resulting crack growth laws are numerically integrated to produce delamination growth versus number of cycles diagrams. The model does not impose any restrictive assumptions on the relative thickness of the delaminated and the base plates, although transverse shear stress effects are not considered. Experimental results are presented for cross-ply graphite/epoxy specimens, and the results are compared with experimental results for unidirectional specimens. The test data are obtained for different delamination locations and for different values of applied compressive strain.

Original languageEnglish (US)
Pages (from-to)143-161
Number of pages19
JournalASTM Special Technical Publication
Volume1285
DOIs
StatePublished - 1997
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Keywords

  • Composite materials
  • Crack growth law
  • Delamination
  • Energy release rate
  • Fatigue (materials)
  • Fracture (materials)
  • Mode mixity
  • Stress intensity factor

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