Influence of shape of nano-Al₂O₃ in epoxy adhesive on the critical energy release rate of tapered double cantilever beam steel joints
by Sunil Kumar Gupta
International Journal of Materials and Structural Integrity (IJMSI), Vol. 15, No. 1, 2023

Abstract: The critical energy release rate (G_IC) in mode I of epoxy reinforced with alumina nanoparticles was determined using tapered double cantilever beam joints. Steel was used as adherend material. Spherical and cylindrical (rod) shapes of nano-Al₂O₃ were reinforced in adhesive by 0.5, 1.0, 1.5, and 2.0 wt.%. A significant improvement in the G_IC of adhesive was obtained at 1.5 wt.% of spherical nano-Al₂O₃ and 1.0 wt.% of rod nano-Al₂O₃ over the neat epoxy adhesive. Reinforcement of rod shape of alumina nanoparticles offered a slightly better critical energy release rate of steel joints than the spherical shape of nanoparticles. The mechanism for improvement in the G_IC of adhesive containing spherical and rod alumina nanoparticles is discussed.

Online publication date: Tue, 09-Jan-2024

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