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Prise en compte du vieillissement et de l'endommagement dans le dimensionnement de structures en matériaux composites / Julien Mercier [ [Texte imprimé]]

Auteur principal : MERCIER, Julien, 1979Auteur secondaire : : Renard, Jacques, 19..-...., enseignant chercheur;Bunsell, Anthony Roland, 1945-....Auteur secondaire collectivité : ENSMP MAT, Centre des matériaux, Evry, Essonne, Editeur scientifiquePublication :Paris : ENSMP, 2006Description : 1 vol (246 p.) : Figures, graphiques ; 30 cmRésumé : La présente étude traite de la durabilité (vieillissement) en milieu humide et de l’endommagement par fissuration de matériaux composites à matrice organique (CMO).; The aim of this study was to better understand the aging of glass fibres-epoxy composites exposed to humid conditions and loading so as to predict its effects on the lifetimes of composite structures. Water diffusion was first experimentally investigated by gravimetric method to determine water sorption kinetics for different humid conditions. A fickian model of diffusion could describe the results obtained. Specimens, saturated at different levels, were mechanically characterised. Decreases of mechanical properties as a function of water uptake were revealed by tensile tests. Damage by cracking and the coupling with humidity were then studied. Differences between reversible and irreversible changes in properties were revealed and analysed in detail. .Bibliographie: Bibliogr. p. 233-240.Thèse : .Sujet : Modélisation ;Dimensionnement ;Matériau composite ;Fissuration ;Endommagement ;Durabilité ;Vieillissement ;Composite matrice organique ;Durabilité ;Fissuration ;Absorption eau ;Modélisation ;Méthode élément fini Ressource en ligneAccès en ligne
Current location Call number Status Notes Date due Barcode
Bib. Evry
EMC MER Sur demande Thèse en ligne EMC MER
Bib. Paris
EMP 153.724 CCL. TH. 1187 Available Thèse en ligne EMP51241D

Bibliogr. p. 233-240

Thèse de doctorat Sciences et Génie des matériaux 2006 Ecole nationale supérieure des mines de Paris

La présente étude traite de la durabilité (vieillissement) en milieu humide et de l’endommagement par fissuration de matériaux composites à matrice organique (CMO).

The aim of this study was to better understand the aging of glass fibres-epoxy composites exposed to humid conditions and loading so as to predict its effects on the lifetimes of composite structures. Water diffusion was first experimentally investigated by gravimetric method to determine water sorption kinetics for different humid conditions. A fickian model of diffusion could describe the results obtained. Specimens, saturated at different levels, were mechanically characterised. Decreases of mechanical properties as a function of water uptake were revealed by tensile tests. Damage by cracking and the coupling with humidity were then studied. Differences between reversible and irreversible changes in properties were revealed and analysed in detail.

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