Experimental study on the interlaminar fracture properties of carbon fibre reinforced polymer composites with a single embedded toughened film

Eva Pappa, James Quinn, James Murray, James Davidson, Conchúr M. Ó Brádaigh, Eddie McCarthy

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, two types of single polymer films have been inserted in a composite laminate to examine their toughening effects on mechanical properties. The first is a thermoplastic polyurethane (PU) film and the second is an adhesive epoxy film, featuring a polyester net. The laminates were manufactured in a co-curing (CC) process, with an extra secondary bonding (SB) process used for the epoxy film. Mode I and mode II interlaminar fracture toughness were measured for laminates manufactured by both processes and compared with the corresponding reference laminate toughness. A significant increase in both mode I and mode II toughness resulted when introducing a single PU film, approximately 290% and 30%, respectively. Similarly, the epoxy film improved the interlaminar fracture properties; the CC process produced an increase of 175% for mode II toughness, while the SB adhesive film showed an increase of 75% for mode II toughness
Original languageEnglish
Article number4103
JournalPolymers
Volume13
Issue number23
Early online date25 Nov 2021
DOIs
Publication statusE-pub ahead of print - 25 Nov 2021

Keywords

  • Mode I fracture
  • Mode II fracture
  • films
  • interlaminar toughness
  • secondary bonding
  • co-curing
  • carbon fibre

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