Analytical determination of mixed-mode energy release rates for delamination using a crack tip element

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Abstract

An analytical crack tip element is presented for the prediction of energy release rate and mode mix for delamination of laminated composites. The element may be used to represent the near-tip region of a delamination in a wide variety of structural geometries. The element equations are derived primarily using classical laminated plate theory; to obtain a singular field based mode mix decomposition, results from a single continuum analysis are also required. For those cases where a linear elastic solution predicts an oscillatory stress singularity an approximation is suggested which allows a unique, physically meaningful value of mode ratio to be defined. Use of the crack tip element and the associated approximation for mode mix decomposition is illustrated through a number of example problems.

Original languageEnglish (US)
Pages (from-to)161-180
Number of pages20
JournalKey Engineering Materials
Volume120-121
StatePublished - 1996

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Keywords

  • Composite Materials
  • Crack Tip Element
  • Delamination
  • Delamination Buckling
  • Edge Delamination
  • Energy Release Rate
  • Fracture

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Ceramics and Composites

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