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Identification des propriétés mécaniques d’enroulements supraconducteurs d’un aimant d’IRM

Communication avec acte
Author
MOULART, Raphaël
211915 Mechanics surfaces and materials processing [MSMP]
ROTINAT, René
211915 Mechanics surfaces and materials processing [MSMP]
NUNIO, François
40222 Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée [DAPNIA]
VEDRINE, Pierre
108823 Centre d'Etude de Saclay

URI
http://hdl.handle.net/10985/9820
Date
2015

Abstract

Cette étude propose une méthodologie expérimentale afin d’identifier les propriétés mécanique élastiques d’anneaux supraconducteurs. Des essais de traction diamétrale associés à une technique de mesure champs de déplacements ont été effectués sur des échantillons. Les champs de déformations ont ensuite été obtenus à partir des champs de déplacements par différentiation numérique. Enfin, les quatre modules élastiques orthotropes dans le plan des enroulements ont été identifiées à l’aide la méthode des champs virtuels.
 
This study deals with an experimental methodology developed in order to identify the elastic properties of superconducting ring-shaped windings. Mechanical tensile tests were conducted on specimens associated to a full-field displacement measurement technique. Strain fields were then obtained from the measured displacement fields by numerical differentiation. Finally, the four in-plane orthotropic stiffnesses of the windings were determined using the Virtual Fields Method
 

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