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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