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Numerical Simulation of NbTi Superconducting Joint With Cold-Pressing Welding Technology

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7 Author(s)
Feng Zhou ; Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, China ; Junsheng Cheng ; Jianhua Liu ; Yinming Dai
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The cold-pressing welding methods are employed to fabricate joints between NbTi multifilamentary conductors, and a series of joints are made at different press amounts for nuclear magnetic resonance magnet applications. The Abaqus-Explicit method was used to do a quasi-static analysis of the cold-pressing welding process. In the simulation, we consider the contact area and equivalent plastic strain to determine the resistance of the superconducting joints qualitatively. The simulation shows that a press amount of 61%-65.5% should be the optimum range, in which the lowest joint resistance can be obtained. Resistances of these joints are also tested using the current decay method to verify the simulation.

Published in:

IEEE Transactions on Applied Superconductivity  (Volume:23 ,  Issue: 6 )