Low temperature mixed-mode debond fracture and fatigue characterisation of foam core sandwich

Arash Farshidi, Christian Berggreen*, Leif A. Carlsson

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

This paper experimentally investigates the effects of low temperature on fracture toughness and fatigue debond growth rate in foam core sandwich composites. Mixed-mode bending specimens were statically and cyclically tested inside a climatic chamber at a low temperature (−20°C) and at room temperature (23°C) as a reference. Testing was conducted in mode I (opening) and mixed-mode I/II (opening-sliding) mode mixities. The fatigue tests results are presented according to the modified Paris–Erdogan relation. Results showed substantial fracture toughness reduction due to low temperature. Low temperature furthermore elevated the cyclic crack growth rate.
Original languageEnglish
JournalJournal of Sandwich Structures and Materials
Volume22
Issue number4
Pages (from-to)1039-1054
ISSN1099-6362
DOIs
Publication statusPublished - 2020

Keywords

  • Mixed-mode bending
  • Low temperature
  • Sandwich
  • Face/core interface
  • Fracture toughness
  • Fatigue crack propagation

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