Design of four-point SENB specimens with stable crack growth

Jeppe Bjørn Jørgensen*, Casper Kildegaard, Bent F. Sørensen

*Corresponding author for this work

    Research output: Contribution to journalJournal articleResearchpeer-review

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    Abstract

    A four-point single-edge-notch-beam (SENB) test specimen loaded in displacement control (fixed grip) is proposed for studying crack deflection at bi-material interfaces. In order to ensure stable crack growth, a novel analytical model of the four-point SENB specimen in fixed grip is derived and compared with numerical models. Model results show that the specimen should be short and thick, and the start-crack length should be deep for the crack to propagate stable towards the bi-material interface. Observations from experimental tests of four-point SENB specimens with different start-crack lengths, confirmed that the crack grows stable if the start-crack length is deep and unstable if not.
    Original languageEnglish
    JournalEngineering Fracture Mechanics
    Volume191
    Pages (from-to)168-186
    Number of pages19
    ISSN0013-7944
    DOIs
    Publication statusPublished - 2018

    Keywords

    • Adhesive
    • Bonded joints
    • Brittle fracture
    • Finite element analysis
    • Stable crack growth

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