Abstract
The effect of the clusterization on the effective properties of a composite material reinforced by MXene or graphene platelets is studied using the finite element method with periodic representative volume element (RVE). A hybrid 2D/3D finite element mesh is used to reduce the computational complexity of the numerical model. Several realizations of an RVE were generated with increasing volume fractions of inclusions, resulting in progressive clusterization of the platelets. Numerically obtained effective properties of the composite are compared with analytical predictions by the Mori-Tanaka method and Halpin-Tsai equations, and the limits of the applicability of the analytical models are established. A two-step homogenization scheme is proposed to increase the accuracy and stability of the effective properties of an RVE with a relatively small number of inclusions. Simple scaling relations are proposed to generalize numerical results to platelets with other aspect ratios.
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