Citation
Konstantopoulou, Konstantina and Serazin, M. and Lloberas, J. and Granados, X. and Sanmarti, M. and Obradors, X. and Pastor Caño, Jose Ignacio
(2013).
Effect of strain and magnetic field on the critical current and electric resistance of the joints between HTS coated conductors.
In: "Current Research in Large-Scale Applications of Superconductivity, IOP", 20/11/2013 - 20/11/2013, Institute of Physics, London, U.K..
Abstract
Engineering of devices and systems such as magnets, fault current limiters or cables, based on
High Temperature Superconducting wires requires a deep characterization of the possible
degradation of their properties by handling at room temperature as well as during the service
life thus establishing the limits for building up functional devices and systems.
In the present work we report our study regarding the mechanical behavior of spliced joints
between commercial HTS coated conductors based on YBCO at room temperature and
service temperature, 77 K.
Tensile tests under axial stress and the evolution of the critical current and the electric
resistance of the joints have been measured. The complete strain contour for the tape and the
joint has been obtained by using Digital Image Correlation. Also, tensile tests under external
magnetic field have been performed and the effect of the applied field on the critical current
and the electric resistance of the joints has been studied.
Finally, a preliminary numerical study by means of Finite Element Method (FEM) of the
mechanical behavior of the joints between commercial HTS is presented.
