Loss of adhesion at the tip of an interface crack

Jan Drewes Achenbach*, Leon M Keer, R. P. Khetan, S. H. Chen

*Corresponding author for this work

Research output: Contribution to journalArticle

57 Scopus citations

Abstract

A model is constructed to analyze adhesive bond failure at the tip of an interface crack. The model is based on the assumption that there are zones of bounded cohesive tensile and shear stresses near a crack tip. Within the context of certain broad a-priori assumptions on the distributions of certain stress and displacement components in the cohesive zones, the requirement that all stresses in the two materials remain bounded provides a method to compute the specific details for these zones. It is assumed that bond failure occurs when the extension of the bond fiber at the crack tip exceeds a critical value. For an interface crack in a uniform tension field computations for two alternate formulations suggest that this failure criterion is independent of the precise distribution of the cohesive stresses, but rather depends only upon their averaged values. Combined loading with a dominant tensile component has also been analyzed. If the critical extension of bond fibers and the maximum value of the cohesive tensile stress are known, the model provides the maximum allowable interface stresses for given crack dimension and material parameters.

Original languageEnglish (US)
Pages (from-to)397-424
Number of pages28
JournalJournal of Elasticity
Volume9
Issue number4
DOIs
StatePublished - Oct 1 1979

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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