Response of Adhesively Bonded Single Lap Joint Doped with Graphene in Adhesive to Shear Loads

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R. Amitkumar
R. Asokan
Kanu Priya Jhanji
Kuleshwar Sokal
Rohit Patil
P. Surya

Abstract

The adhesively bonded joint creates a strong bond between the adherend and the adhesive and are replacing the riveted joints in numerous fields such as aerospace, automobile and civil sectors. In this study, the consequence of compositions of graphene nanoparticle doped in the epoxy adhesive on the shear behaviour of single lap joints of adhesively bonded glass and carbon fibre as adherends were investigated. Glass and carbon fibre laminates were produced using Rotex EP-306 resin and Rotex EH-758 hardener. Adhesively bonded single lap joints were then made by using a two-part epoxy structural adhesive. Graphene was added in weight percentages of 0.1%, 0.5%, 1% and 2% into the resin and dispersed by using the method of ultrasonication. A shear test was carried to determine the bonding strength. Results indicated that joints with 0.5% wt. of graphene showed better bond strength compared to other configurations for both glass and carbon adherend. It was noted that with further increase in percentage of graphene, the shear strength decreased. Furthermore, the joints made with carbon as adherend showed better strength properties in comparison with joints made of glass adherend.

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