Arrest, deflection, penetration and reinitiation of cracks in brittle layers across adhesive interlayers

James Jin Wu Lee, Isabel K. Lloyd, Herzl Chai, Yeon Gil Jung, Brian R. Lawn*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

A layer structure consisting of two glass plates bonded with polymer-based adhesives and loaded at the upper surface with a line-wedge indenter is used to evaluate crack containment. Two adhesives are used, a low-modulus epoxy resin and a particle-filled composite. The adhesives arrest indentation-induced transverse cracks at the first interface. A substantially higher load is required to resume propagation beyond the second interface in the second glass layer. Delamination is not a principal failure mode. Nor is the operative mode of failure one of continuous crack penetration through the adhesive, but rather reinitiation of a secondary crack in the glass ahead of the arrested primary crack. A fracture mechanics analysis, in conjunction with finite element modeling, is presented to account for the essential elements of crack inhibition, and to identify critical material and layer thickness variables. It is confirmed that adhesives with lower modulus and higher thickness are most effective as crack arresters.

Original languageEnglish
Pages (from-to)5859-5866
Number of pages8
JournalActa Materialia
Volume55
Issue number17
DOIs
StatePublished - Oct 2007

Funding

FundersFunder number
National Institute of Dental and Craniofacial ResearchPO1 DE10976
National Institute of Standards and Technology

    Keywords

    • Adhesive joining
    • Contact loading
    • Crack containment
    • Crack penetration
    • Glass

    Fingerprint

    Dive into the research topics of 'Arrest, deflection, penetration and reinitiation of cracks in brittle layers across adhesive interlayers'. Together they form a unique fingerprint.

    Cite this