Face/core mixed mode debond fracture toughness characterization using the modified TSD test method

Christian Berggreen, Amilcar Quispitupa, Andrei Costache, Leif A. Carlsson

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The modified tilted sandwich debond (TSD) test method is used to examine face/core debond fracture toughness of sandwich specimens with glass/polyester face sheets and PVC H45 and H100 foam cores over a large range of mode-mixities. The modification was achieved by reinforcing the loaded face sheet with a steel bar, and fracture testing of the test specimens was conducted over a range of tilt angles. The fracture toughness exhibited mode-mixity phase angle dependence, especially for mode II dominated loadings; although, the fracture toughness remained quite constant for mode I dominated crack loadings. The fracture process was inspected visually during and after testing. For specimens with H45 core the crack propagated in the core. For specimens with an H100 core, the crack propagated between the resin-rich layer and the face sheet. © The Author(s) 2013 Reprints and permissions: sagepub.co.uk/journalsPermissions. nav.
Original languageEnglish
JournalJournal of Composite Materials
Volume48
Issue number16
Pages (from-to)1939-1945
ISSN0021-9983
DOIs
Publication statusPublished - 2014

Keywords

  • fracture mechanics
  • Fracture toughness
  • mixed mode
  • sandwich
  • tilted sandwich debond
  • Cracks
  • Fracture mechanics
  • Fracture testing
  • Polyvinyl chlorides
  • Testing
  • Crack loading
  • Face sheets
  • Fracture process
  • Glass/polyester
  • Mixed mode
  • Phase angle dependence
  • Test specimens
  • Articles

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