TY - JOUR
T1 - Numerical optimisation of mechanical ring reinforcement for bulk high-temperature superconductors
AU - Barthlott, D.
AU - Huang, K. Y.
AU - Durrell, J. H.
AU - Cardwell, D. A.
AU - Holzapfel, B.
AU - Ainslie, M. D.
N1 - Funding Information:
Dr Mark 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 - The finite element method has been used extensively in recent years to solve various problems related to applied superconductivity and provides a useful tool for analysing and predicting experimental results. Based on a recently-developed modelling framework, implemented in the finite element software package COMSOL Multiphysics, investigations on the minimum ring reinforcement required to prevent mechanical failure in bulk high-Temperature superconducting magnets have been carried out. Assuming homogeneous Jc(B,T) across the bulk sample irrespective of its dimensions, the maximum magnetic stresses experienced, and the minimum ring thickness required to prevent the hoop and radial stresses from exceeding the tensile strength of the bulk superconductor have been determined for varying values of the Young's modulus, radius, height and temperature of a representative single-grain Ag-containing Gd-Ba-Cu-O bulk sample. This comprehensive analysis details the influence each of these key parameters has on the magnetic stress and hence their impact on the necessary ring thickness to prevent mechanical failure in any given system, i.e., for any combination of material properties and sample dimensions.
AB - The finite element method has been used extensively in recent years to solve various problems related to applied superconductivity and provides a useful tool for analysing and predicting experimental results. Based on a recently-developed modelling framework, implemented in the finite element software package COMSOL Multiphysics, investigations on the minimum ring reinforcement required to prevent mechanical failure in bulk high-Temperature superconducting magnets have been carried out. Assuming homogeneous Jc(B,T) across the bulk sample irrespective of its dimensions, the maximum magnetic stresses experienced, and the minimum ring thickness required to prevent the hoop and radial stresses from exceeding the tensile strength of the bulk superconductor have been determined for varying values of the Young's modulus, radius, height and temperature of a representative single-grain Ag-containing Gd-Ba-Cu-O bulk sample. This comprehensive analysis details the influence each of these key parameters has on the magnetic stress and hence their impact on the necessary ring thickness to prevent mechanical failure in any given system, i.e., for any combination of material properties and sample dimensions.
UR - http://www.scopus.com/inward/record.url?scp=85088117592&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/1559/1/012031
DO - 10.1088/1742-6596/1559/1/012031
M3 - Conference paper
AN - SCOPUS:85088117592
SN - 1742-6588
VL - 1559
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012031
T2 - 14th European Conference on Applied Superconductivity, EUCAS 2019
Y2 - 1 September 2019 through 5 September 2019
ER -