| A comparative study between analytical and finite element analysis was done to investigate their relationship in the case of a representative single fiber as well as a plain weave composite model. The effective thermo-mechanical properties and mechanical properties were studied for refractory composites for high temperature applications at unit length scale. The method of analyses applied was to consider the material at different scales. Laminated composites that are made of a carbon fiber, a coating layer, and a matrix layer were used. The model included weak tangential bonding of the intra-layer of the matrix material in order to reduce the thermal stress occurring in the coating material caused by mismatch of coefficients of thermal expansions. A plain weave composite and a 3-D braided composite were studied based on unit-cell model approach. Finally, an optimal configuration of composite was suggested by conducting parametric analysis. |
