Simulation of mechanical stresses in reinforced REBaCuO ring bulks during pulsed-field magnetization

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Hirano, T 
Fujishiro, H 
Naito, T 
Ainslie, MD 

jats:titleAbstract</jats:title> jats:pWe 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, jats:inline-formula jats:tex-math

</jats:tex-math> <mml:math xmlns:mml="" overflow="scroll"> mml:mrow mml:msubsup mml:miσ</mml:mi> mml:miθ</mml:mi> mml:mrow <mml:mi mathvariant="normal">mag</mml:mi> </mml:mrow> </mml:msubsup> </mml:mrow> </mml:math> <jats:inline-graphic xmlns:xlink="" xlink:href="JPCS_1559_1_012027_ieqn1.gif" xlink:type="simple" /> </jats:inline-formula>, 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.</jats:p>

51 Physical Sciences
Journal Title
Journal of Physics: Conference Series
Conference Name
14th European Conference on Applied Superconductivity
Journal ISSN
Volume Title
IOP Publishing
Engineering and Physical Sciences Research Council (EP/P020313/1)
JSPS KAKENHI Grant No. 15K04646