Abstract
In this work, the authors introduce an octahedral body centered model transformed into a nine-layer spherical model, to simulate the periodic microstructure of particulate composites. This model takes into account the vicinity of internal and neighboring particles in the form of their deterministic configurations inside the matrix, along with the concept of interphase on the thermomechanical properties of the overall material. The latter is assumed to be homogeneous and isotropic. Next, by the use of this model, in association with classical elasticity approach, a closed form expression to calculate the thermal expansion coefficient of this category of composites is derived The theoretical predictions were compared with experimental results as well as with theoretical values yielded by formulae derived from other workers and they were found to be in good agreement.
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