On the influence of glass fiber mat on the mixed-mode fracture of composite-to-metal bonded joints

Marcio Moreira Arouche, Sofia Teixeira de Freitas*, Silvio de Barros

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)
12 Downloads (Pure)

Abstract

In this work, the influence of a layer of glass fiber mat (GFM) inserted in a bi-material bonded joint interface is investigated as a toughening mechanism to improve the fracture performance of bonded structures. Composite-to-metal bonded specimens were manufactured by hand lay-up using two different consolidation processes: at room pressure or using vacuum bagging. The fracture behavior was evaluated under quasi-static loadings using the mixed-mode bending (MMB) test. Test results revealed an increase of the fracture toughness with the insertion of an adjacent layer of GFM. The toughening mechanism is associated with a more irregular fracture surface profile. It was verified a relationship between the fracture surface roughness and the fracture toughness. The toughening effect showed to be more evident in higher mode II fracture conditions. The insertion of a layer of GFM and the use of vacuum pressure in the consolidation of the composite increase the fracture performance of composite repairs in metal structures.

Original languageEnglish
Article number113109
Number of pages12
JournalComposite Structures
Volume256
DOIs
Publication statusPublished - 2021

Keywords

  • Bi-material bonded joints
  • Fractography
  • Mixed-mode bending (MMB)
  • Surface roughness
  • Toughening mechanism

Fingerprint

Dive into the research topics of 'On the influence of glass fiber mat on the mixed-mode fracture of composite-to-metal bonded joints'. Together they form a unique fingerprint.

Cite this