Mixed mode interface fracture toughness of a multi-directional composite – UD/woven pair

Mor Mega*, Leslie Banks-Sills

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Twenty-seven mixed mode Brazilian disk specimens were tested to obtain the fracture toughness of a delamination between two fiber reinforced composite plies in a multi-directional laminate, manufactured by means of a wet-layup. Using finite element analyses and conservative integrals, mechanical and residual curing stress intensity factors were found and used to calculate the interface energy release rate and phase angles. Based on these results, a three-dimensional failure criterion is proposed to obtain a failure surface. This criterion may be used to predict failure of a structure containing this material and interface.

Original languageEnglish
Article number102323
JournalTheoretical and Applied Fracture Mechanics
Volume104
DOIs
StatePublished - Dec 2019

Keywords

  • Brazilian disk specimen
  • Delamination
  • Fracture toughness testing
  • Laminate composites
  • Mixed mode fracture

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