P Zamani - Ph.D Candidate Department of Mechanical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
A Jaamialahmadi - Assistant Professor Department of Mechanical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
L. F. M. da Silva - Professor, Department of Mechanical Engineering, Faculty of Engineering, University of Porto (FEUP), Porto, Portugal
S Hosseini - Undergraduate Student Department of Mechanical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran

Reinforcement of adhesives by adding nano particles is an important issue for enhancing mechanical performance of bonded lap joints. In this paper, functionalized graphene nano platelets (GNPs) and nano silica particles were added to the structural epoxy adhesive at three weight percentages by implementing four dispersion procedures. The effect of dispersion procedures were investigated on static behavior of nano-reinforced adhesive Al-GFRP single lap joints subjected to four-point bending. Experiments revealed that, for a constant wt% of functionalized GNPs, using magnetic stirring and ultrasonic probe resulted in the greatest static failure load. But for nano silica particles, the maximum failure load was obtained by implementing the magnetic stirring and bath sonication procedure. Moreover, increasing the wt% of each nano particle in the adhesive enhanced the static failure load of the corresponding joint

Single lap joint, Bonded joint, Nano adhesive, Graphene nano platelet, Nano silica, Four-point bending.