Influence of an Arrangement of Combined Fibers on Thermal Conductivity of Unidirectional Fibrous Composite

Fibers and fiber-like inclusions are fairly common reinforcing elements in structural materials. High-strength and high-modulus fibers reinforcement increases the mechanical and thermal properties of the composite. The effective value of the thermal conductivity of the composite depends on the arrangement and volume concentration of fibers. The dependences allowing us to estimate the effective thermal conductivity of the unidirectional transversely isotropic fibrous composite with the combined fibers (fiber and its core are made from different materials) are calculated. A case of the ordered arrangement of fibers in the plane perpendicular to their axis is considered provided that the representative structure of the composite element can be represented as a square cell with the fiber cross-section in the center of it. The presented calculated dependences can be used to predict the values of the components of the effective thermal conductivity of the unidirectional transversal isotropic fibrous composite with the combined fibers.

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