Interfacial cracking from the free-edge of a long bi-material strip

A. R. Akisanya*, N. A. Fleck

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

141 Citations (Scopus)


A singular stress field develops at the corner where an interface between two bonded materials intersects a traction-free edge. Depending upon the geometry of the interface-corner, the free-edge stress singularity may be of the form Hr′ 1, where r is the radial distance from the corner, λ - 1 is the order of the stress singularity and H is the intensity of the singularity. The intensity H of the singularity developed at the free-edge of a long bi-material strip subjected to uniform tension is evaluated for various combinations of materials, using the finite element method. The role of the intensity H in controlling the initial growth of an interfacial edge crack embedded within the singularity zone is examined. The implications of the results for the initiation of free-edge cracks are discussed.

Original languageEnglish
Pages (from-to)1645-1665
Number of pages21
JournalInternational Journal of Solids and Structures
Issue number13
Publication statusPublished - 1 Jan 1997


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