The role of filler aspect ratio in the reinforcement of an epoxy resin with graphene nanoplatelets
Source abstract
Abstract
Abstract The mechanisms of reinforcement of an epoxy resin by the addition of graphene nanoplatelets (GNPs) has been studied in detail. It is found that the addition of GNPs increases both the stiffness and fracture toughness of the epoxy resin. The dependence of the flexural modulus upon the volume fraction of the GNPs has been modelled using a combination of the rule of mixtures and shear lag analysis and it is shown that the reinforcement is controlled principally by the aspect ratio (length/thickness) of the GNPs. The dependence of the fracture energy upon the GNP volume fraction has been modelled assuming failure takes place through the debonding of the GNP particles followed by their pull-out and it is again shown that the aspect ratio of the GNPs is a vital parameter in controlling the level of toughening. It is found that the behaviour can be modelled using a similar value of GNP aspect ratio to model both the flexural stiffness and fracture behaviour, demonstrating the importance of this parameter in controlling the mechanical properties of GNP/epoxy resin nanocomposites. Graphical abstract
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Research context
OpenAlex topics: Mechanical Behavior of Composites · Graphene research and applications · Fiber-reinforced polymer composites
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