TY - JOUR
T1 - On the influence of glass fiber mat on the mixed-mode fracture of composite-to-metal bonded joints
AU - Moreira Arouche, Marcio
AU - Teixeira de Freitas, Sofia
AU - de Barros, Silvio
PY - 2021
Y1 - 2021
N2 - 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.
AB - 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.
KW - Bi-material bonded joints
KW - Fractography
KW - Mixed-mode bending (MMB)
KW - Surface roughness
KW - Toughening mechanism
UR - http://www.scopus.com/inward/record.url?scp=85093984352&partnerID=8YFLogxK
U2 - 10.1016/j.compstruct.2020.113109
DO - 10.1016/j.compstruct.2020.113109
M3 - Article
AN - SCOPUS:85093984352
SN - 0263-8223
VL - 256
JO - Composite Structures
JF - Composite Structures
M1 - 113109
ER -