NDLI: Coupled Mechanical-Electrical Modeling of the TARSIS Experiment

Content Provider	IEEE Xplore Digital Library
Author	Torre, A. Ciazynski, D. Durville, D. Bajas, H. Nijhuis, A.
Copyright Year	2002
Abstract	Nb₃Sn is now commonly used in the design of high-field large-scale magnets. However, it is a brittle material, the superconducting properties of which degrade under mechanical strain. Both ITER TF and CS magnets make use of Nb₃Sn strands in cable-in-conduit conductors. Experiments have been carried out in the TARSIS facility at University of Twente aiming at measuring the strand critical current as a function of periodically applied strain/stress. Until recently, these experiments have given good indications of the strand behavior, but they had not been fully understood because of the lack of an accurate description of the local strain along the tested strand. Furthermore, they cannot be extrapolated directly to a real cable-in-conduit conductor because they do not simulate the differential thermal contraction, which puts the strand under longitudinal compression. Using the mechanical code MULTIFIL developed at Ecole Centrale de Paris, associated with the electrical code CARMEN developed at CEA/IRFM, this paper aims at understanding the mechanisms of the critical current reduction during a TARSIS experiment by coupling the local strain map of the strand to the complex current paths between Nb₃Sn filaments. Comparison with experimental results and with analytic limiting cases are presented and discussed.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	8401005
Ending Page	8401005
Page Count	1
File Size	1071627
File Format	PDF
ISSN	10518223
Volume Number	23
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Strain Conductors Critical current Limiting Integrated circuits Niobium-tin Biological system modeling strain dependence Mechanical properties modeling $\hbox{Nb}_{3}\hbox{Sn}$ strands
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Characterization of $hbox{Nb}_{3}hbox{Sn}$ Strands for a 40-T Hybrid Magnetic Model Coil

Influence of Wire Parameters on Critical Current Versus Strain Characteristics of Bronze Processed ${hbox {Nb}}_{3}{hbox {Sn}}$ Superconducting Wires

Electromechanical Behavior of Bronze $hbox{Nb}_{3} hbox{Sn}$ Strands Under Wide Range Pure-Bending

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Prebending Effect for Mechanical and Superconducting Properties of Nb-Rod-Processed Cu–Nb Internal-Reinforced $hbox{Nb}_{3} hbox{Sn}$ Wires

An FE Model to Study the Strain State of the Filaments of a $hbox{Nb}_{3}hbox{Sn}$ Internal-Tin Strand Under Transverse Load

Numerical Simulation of Critical Current Degradation of $hbox{Nb}_{3}hbox{Sn}$ Strand in CIC Conductor

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Comparison of Critical Current Versus Axial Strain Measurements on Internal Tin $hbox{Nb}_{3}hbox{Sn}$ Strand at ASIPP and University of Twente

Coupled Mechanical-Electrical Modeling of the TARSIS Experiment

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