摘要
对铋系2223高温超导带材的制备过程中所涉及的力学问题进行了理论分析和实验研究.结果表明,由于不同包套和超导芯间的变形阻力不同,导致带材制备过程中的变形均匀性有很大差别;通过对带材轧制过程中截面内的应力分析,解释了超导电流“肌肤效应”产生的原因;通过测量中间轧制过程中超导带材的电流密度,给出了不同包套带材单次轧制的最佳形变量.
The theoretical analysis and experimental study have been carried on involving the mechanical properties during the fabrication process of Bi-system 2223 high temperature superconducting （HTS） tapes. It is shown from the results that the difference of deformation resistance between sheath and core has a great effect on the homogeneity of tapes during fabrication process. By analysis the stress distribution of the specimen, an explanation is given about the ＂surface effect＂ as the current passing through HTS tapes. Moreover, the suitable rolling reductions are suggested according to the testing results about the current density during the rolling process.
出处
《北京交通大学学报》
EI
CAS
CSCD
北大核心
2006年第4期15-17,共3页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
北京交通大学科技基金资助项目(TJJ5005)
