Conveners
Tue-Mo-Po2.05 - Mechanical Behavior I
- Shintetsu Kanazawa (Muroran Institute of Technology)
- Hyung-Seop Shin (Andong National University)
This paper develops and summarizes analytical formulations of radial and tangential stresses of superconducting, no-impregnated solenoids, based on a multilayer model. The analysis takes into account the fabrication steps (pre-winding and reinforcement), cooling-down and energization of the coil (magnetic loading). Both isotropic and orthotropic cases are considered.
Representative...
This paper deals with the mechanical characteristic and strain profile in a 5 T NbTi superconducting split magnet system, which provides a strong background field for the multi-field test facility established in Lanzhou University of China. The design of the split magnets, composed of 14 coils wound with NbTi wires, was adopted to satisfy a large test space (Φ100mm*800mm) for mounting the...
An electromagnetic force has an important effect on the performance of high temperature superconducting magnet. The superconducting magnet can be impregnated with composite resin in order to improve its mechanical stability. A three dimensional model was established by COMOSL finite element analysis software to analyze the electromagnetic stress and strain. The results show that the maximum...
Compressive magnetic radial stress is favored, over tensile one, for a high field magnet, mainly because it lowers the overall peak magnetic stress within the windings of the magnet. It is of particular importance for a no-insulation (NI) high temperature superconductor (HTS) magnet, because the compressive radial stress leads to “good” turn-to-turn contact that is essential for current...
It is well-known that REBaCuO, where RE denotes rare-earth elements, superconducting bulk materials can trap large magnetic field in the compact space. Since REBaCuO bulk materials are subjected to electro-magnetic force, improvements of the mechanical properties of REBaCuO bulk materials are indispensable for the development of high-performance devices. However, conventional REBaCuO bulk...
In designing high field magnets, the enormous mechanical stress on the magnets due to the Lorentz force must be considered. However, the common stress–strain calculations with BJR and/or force balance equation barely considered the frictional force between the superconducting tapes. In this study, the effects of frictional force between these tapes on the stress–strain characteristics were...
REBCO coated conductor (CC) has been applied to high field magnets due to its high critical current density ($Jc$) and high tensile strength. In order to further improve in-field $Jc$, we have developed EuBCO CCs doped BaHfO$_3$ (BHO) as artificial pinning centers (APCs)$^{[1]}$. Since the EuBCO nanocomposite films with the BHO secondary phase is similar to the structure for improving the...
The research and development on the applications of REBCO superconducting coil to the high field magnets for NMR, MRI, accelerator and so on are in progress. In coils wound with REBCO tapes, large screening currents are induced by the radial component of the magnetic field. The magnetic field due to the screening current (hereinafter referred to as screening current-induced field) is generated...
