Investigating the Effect of Reduced Nano Graphene on Adhesive Fracture Resistance under Mixed Mode Loading Conditions Using the Adhesive Zone Mode

Subject Areas :

yadollah bolghand ¹ , Tajbakhsh navid chakherlo ² , Hassan Biglari ³

1 - Instructor, Department of Mechanic Engineering, Aras Branch, Islamic Azad University, Iran.
2 - Full Professor, Department of Mechanics Engineering, University of Tabriz, Iran.
3 - Associate professor, Department of Mechanics Engineering, University of Tabriz, Iran.

Received: 2024-01-19 Accepted : 2024-07-01 Published : 2025-04-30

Keywords: Mix Mode Fracture Cohesive Zone Model Nano Graphene Fracture Strength.,

Abstract :

The effect of adding graphene was studied on the fracture strength of the Araldite adhesive. First, the mechanical characteristics of adhesive and graphene with percentages of 0, 0.25, 0.5 and 1 were obtained by bulk specimens. Using DCB and ENF tests, the fracture energy of adhesive and graphene was calculated in percentages of 0, 0.25, 0.5 and 1. Experimental specimens were made of PMMA and then were bonded using a thin adhesive layer. Different loading modes were created by using the modified Arcan fixtures. Effect of adding graphene in the adhesive layer was studied by using four different weight ratio of graphene including 0, 0.25, 0.5 and 1 percent. The results achieved suggested the use of 0.5% wt. of graphene for achieving the highest fracture force for the experimental specimens. The highest fracture force, between the specimens with the same amount of graphene, was obtained for pure mode II loading condition Examining the fracture behavior of the adhesive layer showed that by adding reduced Nano graphene to the adhesive, the fracture resistance of the adhesive increases in all failure modes due to the presence of reduced Nano graphene and preventing it from propagating cracks.

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