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TORSION STRAIN EFFECTS ON CRITICAL CURRENTS OF HTS SUPERCONDUCTING TAPES
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2010
Year
Critical CurrentsSuperconducting MaterialElectrical EngineeringHigh-tc SuperconductivityEngineeringPhysicsFlexible ElectronicsHigh-temperature SuperconductivityMechanical EngineeringApplied PhysicsCondensed Matter PhysicsSuperconductivityCritical Current DensitiesHigh Tc SuperconductorsTorsional TwistLongitudinal Strain ModelSuperconducting DevicesMechanics Of Materials
A torsional twist strain effect on the critical current of a thin HTS tape has been found to be well described by a longitudinal strain model taking into account the internal shortening compressive strains accompanied with the tensile longitudinal strains due to a torsional twist. The critical current of a twisted tape is given by the integration of the critical current densities corresponding to the strain distribution over the tape cross‐section using axial strain data of the tape. The model is supported with experimental results of YBCO and BSCCO‐2223 tapes. It has been also found that torsional twisting effects on the critical currents of a tape composing of the conventional lapped‐tape cable and the twisted stacked‐tape cable are described by the same equation as that of a twisted single tape.