Investigating the influence of interface in a three phase composite using variational asymptotic method based homogenization technique

摘要

A computational framework based on Variational Asymptotic Method (VAM) has been developed to determine the thermomechanical properties of carbon coated inclusion in three phase Metal Matrix Composites (MMCs). In the model perfect bonding traction and displacement 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 effective properties and local fields have been compared with results from direct Finite Element Analysis (FEA) simulations. Results show good agreement between the model predictions and the FEA simulations. As an application, the framework has been used to investigate the influence of interface volume fraction, stiffness and shape on the overall homogenized properties and the local fields in a three phase composite.