• Experimental study of yttrium barium copper oxide superconducting tape’s critical current under twisting moment

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      https://www.ias.ac.in/article/fulltext/pram/081/04/0667-0676

    • Keywords

       

      Coated conductor; critical current; twisting moment; torsional strain.

    • Abstract

       

      Critical current ($I_{c}$) characteristics of 2G YBCO superconducting tape under the influence of twisting moment was experimentally investigated at varying current ramp rates in the self-field. Under a uniform twist, the degradation in the current-carrying capacity of YBCO tape up to $30\%$ was observed at 77 K. The degradation is largely attributed to the shear stress and torsional shear strain resulting from the twisting. The superconductor to resistive transition index, $n$, is also found to behave in an identical manner with increase in the twisting. Finite element analysis (FEA) of the tape in the experimental configuration with twisting moment being applied on to it has been carried out in COMSOL. The torsional strain calculated analytically as per the experimental configuration matches closely with that of FEA results, which shows that the critical current degradation is a function of strain.

    • Author Affiliations

       

      Ziauddin Khan1 Ananya Kundu1 Subrata Pradhan1

      1. Institute for Plasma Research, Near Indira Bridge, Bhat, Gandhinagar 382 428, I
    • Dates

       
  • Pramana – Journal of Physics | News

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