title: An analysis model of torque dependence of critical current in a Bi2223/Ag composite concentric cylinder.
abstract: In this paper, a model of torque dependence of critical current in a Bi2223/Ag composite concentric cylinder is analyzed. Based on the hypothesis of planar section and elastic linear strengthening constitutive theory, the relation between torque and shear strain is firstly obtained. Then a linear weakening relation between critical current density and shear strain are put forward. Finally the effects of the applied torque together with the mechanical properties of superconducting core on the degradation behavior of critical current are calculated and discussed. The results and conclusions should be helpful to the application of superconducting materials subjected to elastic-plastic torsional deformation.
authors.affiliation: Department of Engineering Mechanics, Shijiazhuang Tiedao University, Shijiazhuang, 050043 People's Republic of China.
authors.forename: Z
authors.initials: Z
authors.lastname: Yan
authors.affiliation: School of Civil Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018 People's Republic of China.
authors.forename: J
authors.initials: J
authors.lastname: Jin
authors.affiliation: Department of Engineering Mechanics, Shijiazhuang Tiedao University, Shijiazhuang, 050043 People's Republic of China.
authors.forename: W J
authors.initials: WJ
authors.lastname: Feng
keywords: Bi2223 composite superconducting cylinder; Degradation behavior of critical current; Elastic–plastic deformation; Linear weakening model; Torque dependence