Effets de la thermo-oxydation sur le comportement mécanique de matériaux composites pour applications aéronautiques

Abstract : It has been previously shown that, at medium temperatures, carbon fibres -epoxy matrix composites can be affected by thermo-oxidation that is a coupled phenomenonof oxygen diffusion and chemical reaction taking place in the oxidation sites present in themolecular structure of the organic matrix. Thermo-oxidation can lead to damage thecomposite surface, without any applied external load.This work has been conducted within the framework of the COMPTINN' project, aiming tostudy the effects of thermal oxidation on the mechanical behaviour of two polymers (an epoxyresin and a polyimide resin) and of the corresponding composites (carbon fibre), and tocharacterize the matrix damages promoted by isothermal ageing. This study is composed ofthree parts: development of a new numerical/experimental technique for characterizing theeffects of thermal oxidation on the local mechanical behaviour of the studied polymers andidentification of a constitutive law; development of a new numerical/experimental approachfor calculating the matrix shrinkage field on the unidirectional composite surfaces, whichleads, during ageing, to the onset of fibre/matrix debonding phenomenon; development of anovel experimental technique for studying the interaction between the mechanicalsolicitations and the oxidation degradation mechanisms through fatigue tests.
Document type :
Theses
Complete list of metadatas

Cited literature [118 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00926658
Contributor : Abes Star <>
Submitted on : Friday, January 10, 2014 - 8:03:44 AM
Last modification on : Tuesday, June 4, 2019 - 6:21:21 PM
Long-term archiving on : Thursday, April 10, 2014 - 10:15:20 PM

File

these-complete-vf.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-00926658, version 1

Collections

Citation

Matteo Minervino. Effets de la thermo-oxydation sur le comportement mécanique de matériaux composites pour applications aéronautiques. Autre. ISAE-ENSMA Ecole Nationale Supérieure de Mécanique et d'Aérotechique - Poitiers, 2013. Français. ⟨NNT : 2013ESMA0015⟩. ⟨tel-00926658⟩

Share

Metrics

Record views

510

Files downloads

2420