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Enhancing the Fracture Toughness Properties by Introducing Anchored Nano-Architectures at the Metal–FRP Composite Interface

Sir Lawrence Wackett Aerospace Research Centre, School of Engineering, RMIT University, Melbourne, VIC 3001, Australia
Author to whom correspondence should be addressed.
J. Compos. Sci. 2019, 3(1), 17;
Received: 30 December 2018 / Revised: 8 February 2019 / Accepted: 11 February 2019 / Published: 13 February 2019
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This paper presents a novel technique for improving aluminium–glass/epoxy composite interfacial bonding through the generation of metallic nano-architectures on the metal surface. Silver nanowires (AgNWs) deposited via solution casting at varying concentrations and annealed at different temperatures in an air atmosphere improved the aluminium-glass/epoxy composite fracture toughness as measured via mode I experiments. For AgNW concentrations of 1 and 3 g/m2 deposited via a single-stage process and annealed at 375 °C, the initiation fracture toughness of the aluminium-glass/epoxy composite improved by 86% and 157%, respectively, relative to the baseline composite without AgNWs. The corresponding steady-state fracture toughness of these nano-modified fibre metal laminates (FMLs) were at least seven times greater than the baseline composite. The FML variant in which AgNWs were deposited at a concentration of 3 g/m2 through a two-stage process followed by annealing at 375 °C and 300 °C, respectively after each deposition, achieved the highest steady-state fracture toughness of all nano-modified composites—a fracture toughness value that was 13 times greater than the baseline composite. Intrinsic and extrinsic toughening mechanisms dictated by the morphology of the silver nano-architectures were found to be responsible for the improved initiation and steady-state fracture toughness in nano-modified FMLs. View Full-Text
Keywords: fibre metal laminates (FMLs); interleaving; mode I fracture toughness fibre metal laminates (FMLs); interleaving; mode I fracture toughness

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Mahendrarajah, G.; Kandare, E.; Khatibi, A.A. Enhancing the Fracture Toughness Properties by Introducing Anchored Nano-Architectures at the Metal–FRP Composite Interface. J. Compos. Sci. 2019, 3, 17.

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