In this work, an advanced body centered polyhedral model to simulate the periodic microstructure of hybrid composites is performed. The overall material consists of a polymeric matrix reinforced with unidirectional continuous fibers and spherical particles. According to this model, both fibers and particles are distributed inside the matrix in a deterministic manner and their configurations depend on each other. In addition, inhomogeneous interphase layers of different thicknesses are considered to surround both particles and fibers. Next, by the use of this model which takes into account the filler arrangement and contiguity along with the interphase concept, the author obtains explicit expressions to evaluate the longitudinal and transverse thermal conductivity of the composite.

hybrid composites, periodic structure, filler arrangement, interphase, thermal conductivities.