Numerical Study on Mechanical Properties of Conductors on Round Core Cables

Hu, Rui; Yuan, Yuchao; Chen, Yanjun; Li, Wenrong; Hao-sheng, YE; Sheng, Jie; Zhao, Yutao; Jin, Zhijian

doi:10.1109/tasc.2021.3062608

Cited by 24 publications

(9 citation statements)

References 29 publications

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“…The critical current of 6-layer CORC cable with a 2.54 mm former decline when the bending radius is 100 mm in the experiment [29]. R. Hu found that when the winding angle of HTS tape on 1-layer CORC cable with 6 mm former is 53.1 • , the optimal bending performance will be obtained, and the optimal critical bending radius is 53 mm [30].…”

Section: Introductionmentioning

confidence: 94%

Bending performance of the CORC cable with flexible interlocked stainless steel former

Shi,

Ma,

Dai

et al. 2023

Supercond. Sci. Technol.

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The high temperature superconducting cable on round core (CORC) is a kind of cable that could be used in fusion projects. Nevertheless, conventional copper former CORC cables require a large external force to allow the cable to endure plastic deformation and be tightly wound into solenoids. In this case, the superconducting tape will be affected by concentrated stress, resulting in a risk of critical current degradation. Therefore, this paper proposes a new CORC cable with flexible interlocked stainless steel former, which can be wound into a solenoid by applying a small external force. To verify the bending performance of this interlocked former CORC cable, a double-layer and a ten-layer interlocked stainless steel former CORC cable, as well as a double-layer traditional copper former CORC cable, are fabricated. And these three CORC cables are used to wind solenoids of various radius sizes respectively. The experimental results show that the critical bending radius of the double-layer interlocked stainless steel former CORC cable is less than 20 mm, the critical bending radius of the ten-layer interlocked stainless steel former CORC cable is less than 50 mm, and the critical bending radius of the double-layer traditional copper former CORC cable is larger than 55 mm. A self-consistent finite element model for the critical current of the CORC cable solenoid is also established. And the critical current experimental results are in good agreement with the simulation results. The results of this paper verify the excellent bending performance of the interlocked former CORC cable, which provides a good option for the preparation of insert magnets for future fusion projects.

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Section: Introductionmentioning

confidence: 94%

Bending performance of the CORC cable with flexible interlocked stainless steel former

Shi,

Ma,

Dai

et al. 2023

Supercond. Sci. Technol.

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show abstract

“…For the coils wound by in-situ densely winding method, if the major radius of skeleton and tube radius are determined, the winding angle of the same width tape has already been determined. Previous researches [27,37,38] showed that, under the same copper tube bending radius, the smaller the winding angle is, the less damage the tape will suffer. Therefore, for the coil in this work, the winding angle of the in-situ densely wound coil and the radius of the skeleton correspond to the critical bending radius of conductor (without extrusion).…”

Section: In-situ Winding Technologymentioning

confidence: 99%

“…In the second stage, constraints were applied at both ends of the copper tube to bend it. In this model, the stress and strain distributions in the first phase would be taken as the initial conditions for the stress and strain in the second stage, and the settings of boundary conditions of the model can be referred to [27]. It should be noted that the model we used was a simplified multi-layer structure of the tape, neglecting the buffer layer and silver layer, while the winding skeleton parameters are from the actual copper material.…”

Section: Stress Analysismentioning

confidence: 99%

“…Recently, some scholars have proposed a non-dense way to wind CORC conductors, so the CORC conductors wound in this way can make the tapes between different turns without contacting each other when bent into the coil, to avoid damage caused by partial bending stress [27]. However, for the multi-layer coils wound in the non-dense way, due to the gaps in the middle, the overall strength of the coils will be weaker than that of the dense coils.…”

Section: Gapmentioning

confidence: 99%

“…There have been many studies on CORC conductors, such as the current-carrying abilities [22,23], experiments on the mechanical properties of straight CORC conductors [24][25][26], and mechanical simulations [27,28]. There are also studies on the AC loss of straight CORC conductors [29,30] and AC loss analysis of circular CORC coils [31].…”

Section: Introductionmentioning

confidence: 99%

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HTS conductor coil by in-situ winding technology for large-scale high-field magnet

Gao,

Shi,

Yang

et al. 2023

Supercond. Sci. Technol.

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High temperature superconducting (HTS) conductors have become important candidates to be used in large-scale high-field magnets, owing to its high critical current density as well as good mechanical properties. At present, there are various forms of HTS conductors proposed. In this work, we reported the fabrication of the REBCO HTS coil using in-situ winding technology. The six-layer coil with a diameter of 410 mm achieved a total current of 2562 A, and generated a central magnetic field of 7.8 mT at 77 K. The stress, deformation, and defect caused during conventional winding procedure could be significantly decreased using in-situ winding technology, indicating it has great potential for the large-scale high-field magnets in next-generation fusion reactors.

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Mechanical Response of Conductor on Round Core (CORC) Cables Under Electromagnetic Force

Liu

Zhang

et al. 2023

Acta Mech. Solida Sin.

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Numerical Study on Mechanical Properties of Conductors on Round Core Cables

Cited by 24 publications

References 29 publications

Bending performance of the CORC cable with flexible interlocked stainless steel former

Bending performance of the CORC cable with flexible interlocked stainless steel former

HTS conductor coil by in-situ winding technology for large-scale high-field magnet

Mechanical Response of Conductor on Round Core (CORC) Cables Under Electromagnetic Force

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