Rare earth barium copper oxide(REBCO)is the most researched and com-mercialized second-generation high-temperature superconducting material.Due to the anisotropic structure,strong deformation sensitivity,and central field errors caused by screening current effects,it is still a challenge for commercialization applications.In this study,the transversely isotropic constitutive relationship is selected as the mechanical model based on the structural characteristics of REBCO tapes,and suitable microele-ments are selected to equate the elastic constants using their average stress-strain rela-tionships.Then,a two-dimensional axisymmetric model for coils wound by single-layer tapes is constructed to analyze the dependence of the electric-magnetic-force distribution in the tape on the strain.Finally,the anisotropic approximation of the homogenized bulk method is used to equate large-turn high-field coils,and the electric-magnetic-force dis-tribution characteristics of the coils with/without screening effects and mechanical strain conditions are investigated,respectively.The results reveal that the mechanical strain has a weakening effect on the electromagnetic field distribution of superconducting tapes,but causes a significant enhancement in the force field distribution.In the presence of 0.5％mechanical strain,the maximum weakening of the peak value of the current density and the critical current density inside the high-field coil can reach about 8％and 13％,re-spectively,with a nearly 5 times increase in the peak stress.The screening current makes the current field distribution inside the coil improve by about 10 times.The screening current induced magnetic field can reach up to 0.8 T,making the relative error of the high-field coil center up to 7.8％.

Wenhai ZHOU;Youhe ZHOU

Key Laboratory of Mechanics on Environment and Disaster in Western China,The Ministry of Education of China,College of Civil Engineering and Mechanics,Lanzhou University,Lanzhou 730000,China;School of Petrochemical Technology,Lanzhou University of Technology,Lanzhou 730050,China

应用数学和力学（英文版）

[1]Wenhai ZHOU;Youhe ZHOU-.Electric-magnetic-force characteristics of rare earth barium copper oxide superconductor high-field coils based on screening effect and strain sensitivity)[J].应用数学和力学（英文版）,2022(08):1249-1268

mercialized,microele

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