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Article Dans Une Revue Composite Structures Année : 2021

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

Résumé

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.
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hal-04246334 , version 1 (17-10-2023)

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Marcio Moreira Arouche, Sofia Teixeira de Freitas, Silvio DE BARROS. On the influence of glass fiber mat on the mixed-mode fracture of composite-to-metal bonded joints. Composite Structures, 2021, 256, pp.113109. ⟨10.1016/j.compstruct.2020.113109⟩. ⟨hal-04246334⟩
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