thermal conductivity, structural model, fiber composite, reinforced materials.

Structural model of thermal conductivity of unidirectionally reinforced layer is under consideration, which includes effective thermal and physical characteristics of fiber composites. Significant distinction of presented model is averaging of rate of heat flow by representative volume element of two-component composite material using Richmanns law of heat transfer between bodies which are in contact instead of simple mixture rule. Within selected approach different cross- sectional shapes of reinforcing fibers are under consideration: parallelogram, isosceles triangle, regular hexagon and regular octagon. Reinforcing fibers which are round in cross-section are approximated by inscribed and circumscribed polygons. Comparison of calculated values of thermal conductivity with several composite material whit knows properties is made.

1. Nemirovsky Yuri Vladimirovich e-mail: nemirov@itam.nsc.ru, Dr. Sci. Phys. & Math., Professor, Institute of Theoretical and Applied Mechanics S. A. Christianovich Siberian Branch of the Russian Academy of Sciences, 2. Novosibirsk, Russia. Stanislavovich Alexey Viacheslavovich e-mail: alexey.st@bk.ru, Postgraduate student, Kemerovo State University, Kemerovo, Russia.