Determination of effective thermal conductivity in fibrous composites with imperfect thermal contact between constituents

Journal Article · · International Communications in Heat and Mass Transfer; (United States)

DOI:https://doi.org/10.1016/0735-1933(93)90012-K· OSTI ID:6251628

Goncalves, L C.C.; Kolodziej, J A ^[1]

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1. Univ. da Beira Interior, Covilha (Portugal)

An analytical-numerical method for the determination of the effective thermal conductivity of unidirectional fibrous composites is proposed. The method enables one to take into account imperfect thermal contact between the fibers and matrix and leads to an explicit formula for the effective thermal conductivity of composite. To use the method, the geometry of regular fiber distribution and the thermal properties of the constituents must be known. The method is applicable irrespective of the fiber volume fraction. Two approaches are used in the method. In the first approach, special boundary conditions between fibers and matrix are adopted. In the second approach, an intermediate thin layer between fibers and matrix is introduced. Numerical results for the case of a square fiber array are presented.

• OSTI ID: 6251628
• Journal Information: International Communications in Heat and Mass Transfer; (United States), Journal Name: International Communications in Heat and Mass Transfer; (United States) Vol. 20:1; ISSN 0735-1933; ISSN IHMTDL
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
COMPOSITE MATERIALS
FIBERS
MATERIALS
MATRIX MATERIALS
PHYSICAL PROPERTIES
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES