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Dynamic mechanical characterisation of turbomachine seal materials - behaviour, friction and erosion

type de publication      communication internationale avec actes publiés
date de publication 2011
auteur(s) Deletombe Eric; Baiz Sarah; Fabis Jacky; Desplanques Yannick
conférence Dynamic Behavior of Structures and Materials, Interaction and Friction
     dates de 13-06-2011 à 15-06-2011
     lieu Metz, France
     nom des actes Proceedings of the conference
pages 1 – 10
résumé Seal materials are used in aircraft engines in order to minimize gaps between rotor blades and carter, and hence optimize their aerodynamic efficiency. During the grinding phase, and along the operational life, contacts occur between the blades and the seal material (or directly the carter if the seal material has been completely eroded), then inducing fatigue or even extreme loads that can lead one way or another to the rupture of the blades. To reduce these risks, and improve the mechanical design of the engine, the industry use numerical simulation tools : for that purpose, the dynamic material behaviour, contact between seal material and blades, and vibrations response need to be modelled, hence characterised under representative dynamic load cases. After a general presentation of the seal material, the presented paper describes the different stages experimental procedure which has been developed in order first, to study the seal material dynamic response and its possible strain rate dependency (hydraulic jack and Split Hopkinson Bars), second, to characterise the abradable tribology and friction properties, and then to study the overall dynamic coupling and erosion with a metallic dummy elastic blade thanks to a dedicated test facility.
mots clés seal material, material behavior, contact, friction, structural dynamics
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