Abstract
Two models, E-S and R-S unit cell models, are presented based on the thermal-electrical analogy technique. The analytical expressions for transverse thermal conductivities of unidirectional composites are derived. The dimensionless effective transverse thermal conductivities are expressed as a function of the ratio (β) of thermal conductivities of filler to matrix, filler volume fraction and the geometry ratio of the filler. The optimization of transverse thermal conductivities of unidirectional composites is then analyzed under different filler volume fractions thermal conductivity ratios β and different geometric architectures. The present analysis allows for a fairly precise evaluation of configuration performance and comparisons of different arrangements. The results show that if a composite is designed for insulation material, we should choose and if a composite is designed for heat dissipating purpose, we should choose