TY - JOUR
T1 - Simulation of mechanical stresses in reinforced REBaCuO ring bulks during pulsed-field magnetization
AU - Hirano, T.
AU - Fujishiro, H.
AU - Naito, T.
AU - Ainslie, M. D.
N1 - Funding Information:
This research is partially supported from JSPS KAKENHI Grant No. 15K04646. M. D. Ainslie would like to acknowledge financial support from an Engineering and Physical Sciences Research Council (EPSRC) Early Career Fellowship EP/P020313/1. All data are provided in full in the results section of this paper.
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2020/6/19
Y1 - 2020/6/19
N2 - We have performed numerical simulations of the electromagnetic, thermal and mechanical properties of a REBaCuO ring-shaped bulk with various reinforcement structures during pulsed-field magnetization (PFM). Compressive and tensile electromagnetic stresses, IMG ALIGN="MIDDLE" ALT="${\sigma }-{\theta }{{\rm{mag}}}$" SRC="JPCS-1559-1-012027-ieqn1.gif"/are developed in the ring-shaped bulk during the ascending and descending stages of PFM, respectively. These stresses increase at lower operating temperatures and for higher applied pulsed fields. In order to reduce these stresses, the ring-shaped bulk was fully encapsulated by outer and inner ring with upper and lower plates made by Al alloy. In particular, this reinforcement structure can achieve the lowest electromagnetic compressive stress, which corresponds to about 54% of that for a conventional ring reinforcement structure, and the electromagnetic tensile stress was also reduced. We also compared the simulation results of the electromagnetic stresses for the ring-shaped bulk to those for a disk-shaped bulk.
AB - We have performed numerical simulations of the electromagnetic, thermal and mechanical properties of a REBaCuO ring-shaped bulk with various reinforcement structures during pulsed-field magnetization (PFM). Compressive and tensile electromagnetic stresses, IMG ALIGN="MIDDLE" ALT="${\sigma }-{\theta }{{\rm{mag}}}$" SRC="JPCS-1559-1-012027-ieqn1.gif"/are developed in the ring-shaped bulk during the ascending and descending stages of PFM, respectively. These stresses increase at lower operating temperatures and for higher applied pulsed fields. In order to reduce these stresses, the ring-shaped bulk was fully encapsulated by outer and inner ring with upper and lower plates made by Al alloy. In particular, this reinforcement structure can achieve the lowest electromagnetic compressive stress, which corresponds to about 54% of that for a conventional ring reinforcement structure, and the electromagnetic tensile stress was also reduced. We also compared the simulation results of the electromagnetic stresses for the ring-shaped bulk to those for a disk-shaped bulk.
UR - http://www.scopus.com/inward/record.url?scp=85088117854&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/1559/1/012027
DO - 10.1088/1742-6596/1559/1/012027
M3 - Conference paper
AN - SCOPUS:85088117854
SN - 1742-6588
VL - 1559
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012027
T2 - 14th European Conference on Applied Superconductivity, EUCAS 2019
Y2 - 1 September 2019 through 5 September 2019
ER -