Abstract
In this study, the effect of the amount of graphene added to aramid fiber/epoxy composites on the mechanical properties of these composites was investigated. In the study, graphene nanoparticles were added to the epoxy matrix at four different rates and mixed by mechanical methods, and then 5-layer aramid epoxy graphene composite plates were obtained using hand lay-up and vacuum infusion methods. Samples were cut from these composite plates according to ASTM 790 for bending test and ASTM D3039 for tensile test and three-point bending and tensile tests were performed. Microstructure examinations were carried out under a macro microscope. After the studies, it was observed that agglomeration occurred in the microstructures of the produced composites. It was determined that graphene added to the aramid epoxy composite increased the bending strength and bending modulus, the highest bending stress was observed in the samples with 1% graphene added. The flexural strength, which compared to the undoped composite, increased about 64 % in this sample. In addition, the highest tensile strength was measured in the undoped sample, and after the 0.25% graphene addition, the tensile strength decreased due to the agglomeration of graphene that occurred in the structure.
Published Version
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