Determination of the influence of interfacial thermal resistance in a three phase composite using variational asymptotic based homogenization method

Abstract

A computational framework based on the Variational Asymptotic Method (VAM) has been developed to determine the effective thermal conductivity of carbon-coated inclusion in the three-phase metal-ceramic composites. In the model, perfect bonding temperature continuity conditions have been assumed between the matrix-interface and interface-inclusion boundaries. Both periodic and random distribution of inclusions have been considered in the study. Simulation results corresponding to homogenized conductivity have been compared with results from various existing analytical models. Results show good agreement between the model predictions and the analytical models. As an application, the framework has been used to investigate the influence of interface thickness, thermal conduction, and shape on the overall homogenized conductivities and the local fields in three-phase composites with coated inclusions. (C) 2020 Elsevier Ltd. All rights reserved.