A Modified TSD Specimen for Fracture Toughness Characterization – Fracture Mechanics Analysis and Design

Christian Berggreen, Leif A. Carlsson

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    Abstract

    The tilted sandwich debond (TSD) specimen has been recognized as a viable candidate for characterization of the face/core fracture resistance. Analysis, however, shows that the range of phase angles that can be realized by altering the tilt angle and other parameters of the test is quite limited. A method to extend the range of mode-mixities of the TSD specimen is to introduce a larger amount of transverse shear by reinforcing the loaded upper face with a stiff metal plate. Analysis shows that this method extends the range of phase angles to a practically useful range. Guidelines on selection of thicknesses of the reinforcement, and design considerations for further modifications are provided.
    Original languageEnglish
    JournalJournal of Composite Materials
    Volume44
    Issue number15
    Pages (from-to)1893-1912
    ISSN0021-9983
    DOIs
    Publication statusPublished - 2010

    Keywords

    • Fracture mechanics
    • Interfaces
    • Mxed mode loading
    • Sandwich structures

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