Thermomechanical response of metal-ceramic graded composites for high-temperature aerospace applications

Review on developments of bulk functionally graded composite materials

“…The results showed that the choice of the RVE did not have a strong influence on the effective FGCM properties. The predicted values were close to or within the bounds of Hashin and Shtrikman, Schapery, and Rosen and Hashin bounds for elasticity, thermal conductivity, CTE and specific heat, respectively [58]. Further, the effect of porosity distribution as a third phase on the thermomechanical properties was also investigated.…”

“…The effect of the different values of the exponent n on the volume fraction distribution of a constituent in the continuously graded and discretely graded FGCMs is shown in Figure 4. Expressions have also been developed for designing the volume fraction distribution of 2D FGCMs [52,58]. Modelling of composite materials has been carried out extensively to predict various properties depending upon the volume fraction of the individual constituents, their morphology, and the relevant properties of these constituents.…”

“…Due to the spatially varying phase morphology and/ or composition in a graded composite, the definition of the RVE is, however, not trivial. A detailed treatment of this problem has been carried out in a recent doctoral thesis work by Deierling [58]. In this work, two different approaches were adopted to define the RVE of the graded composite and three different types of material gradation functions were employed to generate the FGM microstructures.…”