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<p>Adhesive joint techniques are widely used to repair the damaged fiber-reinforced polymer (FRP) composite structures in various structural applications, such as aircraft, wind turbine blades, marine, and nacelles, to restore their strength and stiffness. This work aims at the development of a Co-Cured Single-Lap Joint (CC-SLJ) made of graphene nanoparticles incorporated into epoxy (GNP/epoxy) adhesive to provide significant improvement of strength and stiffness characteristics. The Glass Fiber-Reinforced Polymer (GFRP) composites are lap jointed with GNP adhesive. The different weight percentages of GNP considered in this work are 0.00%, 0.25%, 0.50%, 0.75%, and 1.00%. The Co-Cure Single-Lap Joint’s components, such as GFRP composite and GNP-reinforced epoxy adhesive, are initially tested mechanically to evaluate their mechanical characteristics. Through which the elastic properties of GFRP composite and the tensile strength of graphene nanoparticles (GNP) integrated epoxy are determined experimentally. Also, the fundamental natural frequencies of co-cured single-lap joint composite beams were measured with different GNP/epoxy adhesives through the modal test. The findings revealed that the tensile strength of 0.75&#xa0;wt.% GNP/epoxy is considerably superior to that of the other combinations. In fact, it is 60.31 percent more than that of the plain epoxy sample. The incorporation of 0.75&#xa0;wt.% GNP/epoxy with co-cure Single-lap joints showed a notable enhancement of the adhesive’s vibration behavior under various end conditions.</p>

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Development of Co-cured Single-Lap Joints Reinforced with Graphene-Modified Epoxy Adhesives: Manufacturing, Mechanical Characterization, and Structure–Property Evaluation

  • 期刊论文

  • 发表日期：

    2026年4月20日

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  • Anandhan Venugopal,
  • Edwin Sudhagar P,
  • Vimalanand Suthenthira Veerappa,
  • R. Prayer Riju,
  • Elango Venkatachalam

摘要

Adhesive joint techniques are widely used to repair the damaged fiber-reinforced polymer (FRP) composite structures in various structural applications, such as aircraft, wind turbine blades, marine, and nacelles, to restore their strength and stiffness. This work aims at the development of a Co-Cured Single-Lap Joint (CC-SLJ) made of graphene nanoparticles incorporated into epoxy (GNP/epoxy) adhesive to provide significant improvement of strength and stiffness characteristics. The Glass Fiber-Reinforced Polymer (GFRP) composites are lap jointed with GNP adhesive. The different weight percentages of GNP considered in this work are 0.00%, 0.25%, 0.50%, 0.75%, and 1.00%. The Co-Cure Single-Lap Joint’s components, such as GFRP composite and GNP-reinforced epoxy adhesive, are initially tested mechanically to evaluate their mechanical characteristics. Through which the elastic properties of GFRP composite and the tensile strength of graphene nanoparticles (GNP) integrated epoxy are determined experimentally. Also, the fundamental natural frequencies of co-cured single-lap joint composite beams were measured with different GNP/epoxy adhesives through the modal test. The findings revealed that the tensile strength of 0.75 wt.% GNP/epoxy is considerably superior to that of the other combinations. In fact, it is 60.31 percent more than that of the plain epoxy sample. The incorporation of 0.75 wt.% GNP/epoxy with co-cure Single-lap joints showed a notable enhancement of the adhesive’s vibration behavior under various end conditions.