Experimental identification of the overall elastic rigidities of superconducting windings

Issue title: Proceedings from the 17th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2015)

Guest editors: Fumio Kojima, Futoshi Kobayashi and Hiroyuki Nakamoto

Article type: Research Article

Authors: Rotinat, René^{a; *} | Moulart, Raphaël^a | Nunio, François^b | Vedrine, Pierre^b

Affiliations: [a] MSMP Lab., Arts et Métiers ParisTech, Ch{â}alons-en-Champagne Cedex, France | [b] DSM/IRFU, CEA, Gif-sur-Yvette Cedex, France

Correspondence: [*] Corresponding author: René Rotinat, MSMP Lab., Arts et Métiers ParisTech, Rue St Dominique, BP 508, Châlons-en-Champagne, F-51006, France. E-mail:rene.rotinat@ensam.eu

Abstract: This study deals with an experimental methodology developed in order to identify the elastic properties of superconducting ring-shaped windings, constituents of the main coil winding of a magnetic resonance imaging magnet (MRI). Mechanical tensile tests were conducted on real scale specimens associated to an optical full-field displacement measurement technique (stereo image correlation). 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 (VFM). Experimental set-up also allows detecting a possible occurrence of a delamination thanks to in-plane displacement fields.

Keywords: Full-field measurement, DIC, orthotropic elasticity, VFM, superconductors, MRI

DOI: 10.3233/JAE-162060

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 1-2, pp. 739-745, 2016