Analysis of torsional deformation-induced degeneration of critical current of Bi-2223 HTS composite tapes

Gao, Peifeng; Wang, Xingzhe

doi:10.1016/j.ijmecsci.2018.04.029

Cited by 18 publications

(15 citation statements)

References 27 publications

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“…Furthermore, irreversible degradation of I c in both BSCCO-based (e.g. Bi-2212 and Bi-2223) and REBCO conductors has been studied using a statistical approach based upon the Weibull statistics [31,32,[42][43][44][45]. Here a critical current phenomenological model that combines the Ekin power-law formula and the Weibull distribution function with the REBCO conductor model is used to predict the electromechanical behavior of I c in REBCO conductors across the entire strain range.…”

Section: Uniaxial Tensile Load Simulationmentioning

confidence: 99%

“…Ignoring the linear deformation effect on the REBCO cross-section area, and assuming a uniform distribution of current on the REBCO layer, the normalized critical current A statistical approach based upon the Weibull distribution function has been used to characterize the effective area of undamaged superconducting region under deformation in BSCCO-based conductors [42][43][44][45], and the irreversible degradation of I c in both BSCCO-based and REBCO conductors [31,32]. The statistical ratio of undamaged superconducting cross-section area to the before-damaged superconducting cross-section area under uniaxial loadings, S S , Figure 13 compares the simulation result calculated by (24) against the experimental data taken from [8] for the applied strain dependence of (normalized) critical current.…”

Section: Uniaxial Tensile Load Simulationmentioning

confidence: 99%

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Stress, strain and electromechanical analyses of (RE)Ba₂Cu₃O_xconductors using three-dimensional/two-dimensional mixed-dimensional modeling: fabrication, cooling and tensile behavior

Gao

Chan

Wang

et al. 2020

Supercond. Sci. Technol.

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High temperature superconducting (HTS) conductors, represented by Rare Earth-Barium-Copper-Oxide (REBCO) conductors, are promising for high energy and high field superconducting applications. In practical applications, however, the HTS conductors experience different stresses and strains, including residual stresses due to thermal mismatch and tensile stresses due to Lorentz forces, resulting in some circumstances to a reduction in the load-carrying capacity as well as the risk of degradation in conductor critical current. In this study a mixeddimensional high-aspect-ratio laminated composite finite element model for REBCO conductor is developed for stress and strain analyses in the processes of fabricating and cooling, as well as tensile testing. The model includes all the major constituent layers of a typical REBCO conductor and is experimentally validated. First, the thermal residual stresses and strains accumulated during the fabrication and cooling processes are analyzed by a multi-step modeling method that emulates the manufacturing process. Then, with the residual stresses and strains as initial stresses and strains, the mechanical behavior under a tensile load is studied. Lastly, a phenomenological critical current-strain model based on the Ekin power-law formula and the Weibull distribution function is combined with the mixed-dimensional conductor model to predict the strain dependence behavior of critical current in the reversible and irreversible degradation strain ranges. Simulation results show that the multi-step modeling is an effective method for stress and strain analyses of REBCO conductors during the fabrication and cooling processes and under and tensile loads. Compressive thermal residual stress generated on the REBCO layer during fabrication and cooling strongly affects the subsequent mechanical and current-carrying properties. Stress-strain curves generated by tensile loads are analyzed and experimentally validated at both the conductor and constituent-layer levels. Simulation results for the strain dependence of critical current are in good agreement with experiment data in both the reversible and irreversible degradation stages.

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Section: Uniaxial Tensile Load Simulationmentioning

confidence: 99%

Section: Uniaxial Tensile Load Simulationmentioning

confidence: 99%

Stress, strain and electromechanical analyses of (RE)Ba₂Cu₃O_xconductors using three-dimensional/two-dimensional mixed-dimensional modeling: fabrication, cooling and tensile behavior

Gao

Chan

Wang

et al. 2020

Supercond. Sci. Technol.

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“…Current superconducting magnets are based on low‐temperature superconductors (LTS) like NbTi and Nb3Sn, and their fields are limited to 23.5 T, which is the critical fields of Nb3Sn. The second generation (2G) high‐temperature superconductor (HTS), (RE)Ba 2 Cu 3 O x (REBCO), shows significant advantages on high critical fields and high current density, which has been improved in recent two decades [5, 6]. It has a great potential to generate extra high magnetic fields up to 100 T at low temperature far exceeding the possible field range of LTS can reach [7].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic modelling using T‐A formulation for high‐temperature superconductor (RE)Ba ₂ Cu ₃ O _x high field magnets

Wang

Bai

et al. 2020

High Voltage

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Second generation (2G) high-temperature superconductor (HTS) (RE)Ba 2 Cu 3 O x (REBCO) shows a great potential in building high field magnets beyond 23.5 T. The electromagnetic modelling is vital for the design of HTS magnet, however, this always suffers the challenge of huge computation for high field magnets with large number of turns. This study presents a novel electromagnetic modelling based on T-A formulation for REBCO magnets with thousands of turns. An equivalent turn method is proposed to reduce the number of turns in calculation, so that the computation cost can be reduced significantly, and meanwhile the key electromagnetic behaviour of HTS magnet can be simulated with enough accuracy. The ramping operation of a fully HTS magnet with 12,000 turns are analysed using both the original T-A model with actual turns and improved T-A model with equivalent turns. The two models show a good agreement on the key electromagnetic behaviours of the magnet: distribution of current density, magnetic fields, screen current induced field and magnetisation loss, so that this improved T-A model using equivalent turns is validated. The T-A modelling of REBCO magnet is a powerful tool for the electromagnetic analysis of industry-scale high field magnets.

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“…Therefore, a modeling tool is essential to help understand its quench behavior under the influence of TCR. So far, however, most of the present modeling studies on HTS focus on electromagnetic behaviors [33][34][35][36][37][38][39][40]. There is no multiphysics quench modeling for 2G HTS CORC cables.…”

Section: Introductionmentioning

confidence: 99%

Quench behavior of high-temperature superconductor (RE)Ba₂Cu₃O_x CORC cable

Wang¹,

Zheng²,

Zhu³

et al. 2019

J. Phys. D: Appl. Phys.

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High temperature superconductor (HTS) (RE)Ba2Cu3Ox (REBCO) conductor on round core cable (CORC) has high current carrying capacity for high field magnet and power applications. In REBCO CORC cables, current redistribution occurs among tapes through terminal contact resistances when a local quench occurs. Therefore, the quench behaviour of CORC cable is different from single tape situation, for it is

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Analysis of torsional deformation-induced degeneration of critical current of Bi-2223 HTS composite tapes

Cited by 18 publications

References 27 publications

Stress, strain and electromechanical analyses of (RE)Ba₂Cu₃O_xconductors using three-dimensional/two-dimensional mixed-dimensional modeling: fabrication, cooling and tensile behavior

Stress, strain and electromechanical analyses of (RE)Ba₂Cu₃O_xconductors using three-dimensional/two-dimensional mixed-dimensional modeling: fabrication, cooling and tensile behavior

Electromagnetic modelling using T‐A formulation for high‐temperature superconductor (RE)Ba ₂ Cu ₃ O _x high field magnets

Quench behavior of high-temperature superconductor (RE)Ba₂Cu₃O_x CORC cable

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Analysis of torsional deformation-induced degeneration of critical current of Bi-2223 HTS composite tapes

Cited by 18 publications

References 27 publications

Stress, strain and electromechanical analyses of (RE)Ba2Cu3Oxconductors using three-dimensional/two-dimensional mixed-dimensional modeling: fabrication, cooling and tensile behavior

Stress, strain and electromechanical analyses of (RE)Ba2Cu3Oxconductors using three-dimensional/two-dimensional mixed-dimensional modeling: fabrication, cooling and tensile behavior

Electromagnetic modelling using T‐A formulation for high‐temperature superconductor (RE)Ba 2 Cu 3 O x high field magnets

Quench behavior of high-temperature superconductor (RE)Ba2Cu3O x CORC cable

Contact Info

Product

Resources

About

Stress, strain and electromechanical analyses of (RE)Ba₂Cu₃O_xconductors using three-dimensional/two-dimensional mixed-dimensional modeling: fabrication, cooling and tensile behavior

Stress, strain and electromechanical analyses of (RE)Ba₂Cu₃O_xconductors using three-dimensional/two-dimensional mixed-dimensional modeling: fabrication, cooling and tensile behavior

Electromagnetic modelling using T‐A formulation for high‐temperature superconductor (RE)Ba ₂ Cu ₃ O _x high field magnets

Quench behavior of high-temperature superconductor (RE)Ba₂Cu₃O_x CORC cable