Modeling of the bending strain dependence of the critical current in Bi2223/Ag composite tapes based on the damage stress of the superconducting filament

作者：Gou, Xiaofan^*; Shen, Qiang

来源：Physica C-Superconductivity and Its Applications, 2012, 475: 5-9.

DOI：10.1016/j.physc.2012.01.009

• Bi2223 composite superconductor
• Critical current
• Damage stress
• Elastic modulus

An analysis model of the bending strain dependence of the critical current in multifilamentary Bi2223/Ag composite tapes is presented. To investigate the effect of the mechanical properties of the Bi2223 superconducting filament, the actual part for carrying current, its damage stress and elastic modulus are introduced. The calculated result of the variation of the critical current with the bending strain is well agreed with the experimental one. The further studies find that the mechanical properties of the filament have a remarkable effect on the bending strain dependence of the critical current. Specifically, the larger the damage stress and elastic modulus of the filament are, the higher the critical current is, when the bending strain increases to a larger value beyond the critical one.

• 出版日期2012-5
• 单位河海大学