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Université d'Orléans |  |
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Université d'Orléans | |
| HAL : hal-00714950, version 1 |
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| ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis (ESDA 2012), Nantes : France (2012) |
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| A MACROSCOPIC MODEL OF THE THERMO-CHEMO-MECHANICAL BEHAVIOUR OF MIXED IONIC AND ELECTRONIC CONDUCTORS |
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Olivier Valentin 1Camille Gazeau 1 |
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| (02/07/2012) |
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| This paper suggests a macroscopic model describing the thermo-chemo-mechanical behaviour of ceramic dense membrane for oxygen separation application. This work takes in account to oxygen permeation and strain induced by stoichiometry variation with working conditions. This model, developed within the traditional framework of phenomenological approach, is based on the assumption of strain partitions and requires only three state variables: oxygen activity, temperature and total strain. Oxygen bulk diffusion and surface exchanges are described thanks to the thermodynamic approach developed by Onsager. While many works focused on semi-permeation induced strain, the proposed model also includes the temperature effect on chemical expansion. Strains predicted by the proposed model are validated thanks to experimental test on La0.8Sr0.2Fe0.7Ga0.3O3-δ. Implemented in F.E.A code Abaqus, this model permits studying the design and the process management effects such as chemical shocks on the membrane reliability. |
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| 1 : | Laboratoire PRISME (PRISME) |
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Université d'Orléans : EA4229 – ENSI Bourges |
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| 2 : | Science des Procédés Céramiques et de Traitements de Surface (SPCTS) |
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CNRS : UMR6638 – Université de Limoges – Ecole Nationale Supérieure de Céramique Industrielle – Institut des Procédés Appliqués aux Matériaux |
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| 3 : | Air Liquide / Centre de Recherche Claude Delorme [Jouy-en-Josas] (CRCD) |
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Air Liquide |
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| F2ME Axe 1 : procédés céramiques |
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| Domaine | : | Sciences de l'ingénieur/Mécanique/Matériaux et structures en mécanique Physique/Mécanique/Matériaux et structures en mécanique |
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| Liste des fichiers attachés à ce document : | |||||
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| hal-00714950, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00714950 | |
| oai:hal.archives-ouvertes.fr:hal-00714950 | |
| Contributeur : Camille Gazeau | |
| Soumis le : Vendredi 6 Juillet 2012, 14:11:20 | |
| Dernière modification le : Lundi 11 Février 2013, 10:04:29 | |
