Skip to Main content Skip to Navigation
Theses

Outils de caractérisation thermophysique et modèles numériques pour les composites thermostructuraux à haute température

Abstract : This work is an original contribution to the study of the thermostructural composite materials thermal behaviour. It aims to develop a methodology with a new experimental device for thermal characterization adapted to this type of material and to model the heat transfer by conduction within these heterogeneous media. The first part deals with prediction of the thermal effective conductivity of stratified composite materials in the three space directions. For that, a multiscale model using a rigorous morphology analysis of the structure and the elementary properties is proposed and implemented. The second part deals with the thermal characterization at high temperature. It shows how to estimate simultaneously the thermal effusivity and the thermal conductivity. The present method is based on the observation of the heating from a plane sample submitted to a continuous excitation generated by Joule effect. Heat transfer is modelled with the quadripole formalism, temperature is here measured on two sides of the sample. The development of both resistive probes for excitation and linear probes for temperature measurements enables the thermal properties measured up to 1000°C. Finally, some experimental and numerical application examples lead to review the obtained results.
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-00410254
Contributor : Christophe Lorrette <>
Submitted on : Wednesday, August 19, 2009 - 10:42:44 AM
Last modification on : Monday, October 19, 2020 - 11:12:44 AM
Long-term archiving on: : Tuesday, June 15, 2010 - 8:53:48 PM

Identifiers

  • HAL Id : tel-00410254, version 1

Collections

Citation

Christophe Lorrette. Outils de caractérisation thermophysique et modèles numériques pour les composites thermostructuraux à haute température. Matériaux. Université Sciences et Technologies - Bordeaux I, 2007. Français. ⟨tel-00410254⟩

Share

Metrics

Record views

377

Files downloads

3485