Effect of mechanical loading on the I/sub c/ degradation behavior of Bi-2223 tapes

During the winding process of HTS coils the tapes of Bi-2223 are subjected to the influence of bending strain, axial strain, compressive force and torsional deformation resulting in I/sub c/ degradation. In the literature the effects of the individual strain components are separately analyzed in spi...

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Veröffentlicht in:IEEE transactions on applied superconductivity 2005-06, Vol.15 (2), p.3552-3555
Hauptverfasser: Baldan, C.A., Shigue, C.Y., Filho, E.R., Oliveira, U.R.
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Shigue, C.Y.
Filho, E.R.
Oliveira, U.R.
description During the winding process of HTS coils the tapes of Bi-2223 are subjected to the influence of bending strain, axial strain, compressive force and torsional deformation resulting in I/sub c/ degradation. In the literature the effects of the individual strain components are separately analyzed in spite of during coil winding and energizing the strain-stress effects are combined. In this work using commercial tapes of Bi-2223 Ag/AgMg with and without stainless steel reinforcement several samples were wound on cylindrical FRP G-10 holder in which different combined strains are applied. Measurements of I-V characteristic curves are done to determine the degree of critical current degradation and the operational limits. The results are compared with the I/sub c/ values of short samples and other specimens subjected to deformation generated by loading types such as tensile and bending strain.
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subjects Bi-2223 tapes
Capacitive sensors
Coils
Critical current
Current measurement
Degradation
Fiber reinforced plastics
High temperature superconductors
HTS coils
Steel
stress-strain
Tensile strain
Wounds
title Effect of mechanical loading on the I/sub c/ degradation behavior of Bi-2223 tapes
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