Modeling of the bending strain dependence of the critical current in Bi2223/Ag composite tapes based on the damage stress of the superconducting filament
Modeling of the bending strain dependence of the critical current in Bi2223/Ag composite tapes based on the damage stress of the superconducting filament
复制标题
基于超导丝损伤应力的 Bi2223/Ag 复合带中临界电流的弯曲应变依赖性建模
DOI：
10.1016/j.physc.2012.01.009
复制
发表时间：
2012-05-01
影响因子：
1.7
通讯作者：
Shen, Qiang
中科院分区：
文献类型：
--
作者：
Gou, Xiaofan;Shen, Qiang
提出了Bi 2223/Ag多层复合带材临界电流与弯曲应变关系的分析模型。为了研究Bi 2223超导线材力学性能的影响因素，介绍了实际载流部分及其损伤应力和弹性模量。临界电流随弯曲应变变化的计算结果与实验结果吻合较好。进一步的研究发现，灯丝的力学性能对临界电流的弯曲应变依赖性有显著的影响。当弯曲应变超过临界值时，灯丝的损伤应力和弹性模量越大，临界电流越大。(C)2012年爱思唯尔B。V.保留所有权利。
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. (C) 2012 Elsevier B. V. All rights reserved.