Engineering Mechanics

Proceedings Vol. 14 (2008)

ENGINEERING MECHANICS 2008

Copyright © 2008 Institute of Thermomechanics, Academy of Sciences of the Czech Republic, v.v.i., Prague

 

Vorel J., Sýkora J., Šejnoha M.
pages 268 - +6p., full text

An efficient approach to the evaluation of effective thermal conductivity of carbon-carbon (C/C) plain weave textile composites using the Mori-Tanaka (MT) method is presented. The method proves its potential even if applied to real orthotropic material systems with various types of imperfections including the non-uniform waviness of the fibre-tow paths. Uncertainties linked to other geometrical parameters are mostly reflected in the derivation of an optimal shape of the equivalent ellipsoidal inclusion using a family of ideal periodic unit cells (PUC). Evaluation of the effective properties in the absence of pores is presented first. Ellipsoidal pores are then introduced in the second step into a new homogenized matrix to account for the presence of large vacuoles in the composite. Several examples are presented to demonstrate this approach.

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