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Degradation of critical current in Bi2212 composite wire under compression load

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Abstract

Since Bi2Sr2Ca1Cu2O8+x(Bi2212) wires are subject to mechanical loadings, degradation of critical current will occur. The effect of compressive loadings on the critical current of Bi2212 wire is studied by considering micro-buckling of filament. A Bi2212 wire is regarded as a unidirectional filament-reinforced composite in the theoretical analysis. By considering the influence of inclusion, the micro-buckling wavelength can be derived by using a two-dimensional model. Based on the experimental results, the critical current is fitted as a function of buckling wavelength. It is found that the decrease of the critical current is directly proportional to the reciprocal of square of the buckling wavelength. Change of micro-buckling wavelength with material parameters is discussed. A critical strain in the wire with a filament bridge is analyzed using the finite element method.

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Authors and Affiliations

  1. Key Laboratory of Mechanics on Environment and Disaster in Western China, College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, 730000, China

    Zhiyang Wang, Huadong Yong & Youhe Zhou

Authors
  1. Zhiyang Wang
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  2. Huadong Yong
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  3. Youhe Zhou
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Correspondence to Huadong Yong.

Additional information

Project supported by the National Natural Science Foundation of China (Nos. 11327802, 11472120, and 11421062), the National Key Project of Magneto-Constrained Fusion Energy Development Program (No. 2013GB110002), and the Fundamental Research Funds for the Central Universities (No. lzujbky-2017-k18)

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Wang, Z., Yong, H. & Zhou, Y. Degradation of critical current in Bi2212 composite wire under compression load. Appl. Math. Mech.-Engl. Ed. 38, 1773–1784 (2017). https://doi.org/10.1007/s10483-017-2286-8

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  • DOI: https://doi.org/10.1007/s10483-017-2286-8

Keywords

Chinese Library Classification

2010 Mathematics Subject Classification

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