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 (GIC) 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 GIC 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 GIC of adhesive containing spherical and rod alumina nanoparticles is discussed.

Online publication date: Tue, 09-Jan-2024

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