Two Step Homogenization of Effective Thermal Conductivity for Macroscopically Orthotropic C/C composites

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F08%3A01152897" target="_blank" >RIV/68407700:21110/08:01152897 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Two Step Homogenization of Effective Thermal Conductivity for Macroscopically Orthotropic C/C composites

Original language description

An efficient approach to the evaluation of effective thermal conductivity of carbon-carbon (C/C) plain weave textile composites using the Mori-Tanaka 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. These are typically introduced in terms of histograms of the distribution of inclination angles. 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. 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.

Czech name

Dvouúrovňová homogenizace effektivní tepelné vodivosti makroskopicky ortotropního C/C kompozitu

Czech description

Uhlík=uhlík kompozity patří do významné skupiny vysoko-teplotních materiálových systémů. Jejich výjimečná teplotní stabilita a odolnost je předurčuje k využití v mnoha průmyslových odvětvích. Z těchto důvodů je v příspěvku představena homogenizační metoda Mori-Tanaka pro určení efektivní tepelné vodivosti a to jak na mikro-, tak na meso-úrovni.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JI - Composite materials

OECD FORD branch

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Project

<a href="/en/project/GA106%2F07%2F1244" target="_blank" >GA106/07/1244: Geometrical and constitutive modeling of porous carbon-carbon composites</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2008

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Bulletin of Applied Mechanics

ISSN

1801-1217

e-ISSN

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Volume of the periodical

4

Issue of the periodical within the volume

14

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

6

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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