Electromechanical Behavior of IBAD/MOCVD YBCO Coated Conductors Subjected to Torsion and Tension Loading

被引：30

作者：

Majkic, Goran ^{[1
,2
]}

Mensah, Robert J. ^{[1
,2
]}

Selvamanickam, Venkat ^{[3
]}

Xie, Yi-Yuan ^{[3
]}

Salama, Kamel ^{[1
,2
]}

机构：

[1] Univ Houston, Dept Mech Engn, Houston, TX 77204 USA

[2] Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA

[3] SuperPower Inc, Schenectady, NY 12304 USA

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2009年 / 19卷 / 03期

关键词：

Mechanical properties; superconductor; tension; torsion; YBCO; C DEGRADATION BEHAVIOR;

D O I：

10.1109/TASC.2009.2018825

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Combined twist and tensile loading states are expected in many applications of YBCO coated conductors. Wire twist is introduced due to winding on complex shapes or for AC loss reduction, while tensile loading originates from sources such as differential thermal expansion and inertial forces. In this study, we analyse the electromechanical behavior of an IBAD/MOCVD YBCO coated conductor configuration with the superconducting layer deposited on hastelloy substrate and encapsulated by copper. The effect of pre-applied twist on degradation of current carrying capability as a function of tensile stress was studied via experimental measurements on tapes with 1 micron thick YBCO layer and 50 micron thick hastelloy substrate at 77 K. In addition, the stress states under pure torsion are modeled using continuum mechanics. Both numerical and approximate analytical solutions are presented, and the stress and strain distributions as a function of applied twist angle are analysed.

引用

页码：3003 / 3008

页数：6

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