Numerical investigation on decreasing radial stress in epoxy impregnated REBCO pancake coils by overband

doi:10.1016/j.cryogenics.2019.08.002

	Numerical investigation on decreasing radial stress in epoxy impregnated REBCO pancake coils by overband
	Gao, Peifeng 2; Wei, Xiao-ping 3; Wu, Beimin 4; Xin, Canjie 4; Liao, Tianfa 1; Wu, Wei 1,4; Guan, Mingzhi 1,4
刊名	CRYOGENICS
	2019-10-01
卷号	103 页码:6
关键词	Epoxy impregnated REBCO coil Radial stress Overband radial build Degradation Numerical investigation
ISSN号	0011-2275
DOI	10.1016/j.cryogenics.2019.08.002
通讯作者	Guan, Mingzhi(mzg615@impcas.ac.cn)
英文摘要	Rare-earth-barium-copper-oxide (REBCO) coated conductors are promising conductors for high energy and high field superconducting applications. In the case of epoxy impregnated REBCO superconducting pancake coils, however, excessive radial tensile stress generated in the winding when the coils are cooled from room temperature to 77 K or less can cause delamination, resulting in irreversibly degradation in the coils. To ensure the stable operation of superconducting coils, it is important to decrease radial tensile stress in epoxy impregnated REBCO pancake coils. In this study, the fabrication method of overband radial build in epoxy impregnated REBCO pancake coils is presented and numerically analyzed. A two-dimensional axisymmetric finite element model (FEM) with the equivalent homogeneous coil properties is built and validated to analyze the effect of overband on the stress distribution in epoxy impregnated REBCO coils. Furthermore, a series of parametric studies on overband radial build effects on radial stress in an epoxy impregnated coil are carried out based on the proposed FEM. Finally, the predictions of radial stresses in epoxy impregnated REBCO coils with overbands made of different engineered materials are presented and evaluated. The results show that the fabrication method of constructing overband radial build in epoxy impregnated REBCO pancake coils can effectively reduce the radial tensile stress in the windings.
资助项目	China Postdoctoral Science Foundation[2019T120963] ; China Postdoctoral Science Foundation[2018M633604] ; China Postdoctoral Science Foundation[2014M560820] ; China Postdoctoral Science Foundation[2015T81071] ; Fundamental Research Funds for the Central Universities[lzujbky-2018-it01] ; Fundamental Research Funds for the Central Universities[lzujbky-2018-it27] ; Youth Innovation Promotion Association Chinese Academy of Science[2019404] ; Chinese Academy of Science Light of West China Program
WOS关键词	YBCO-COATED CONDUCTORS ; PERFORMANCE ; DEGRADATION ; STRENGTH ; BEHAVIOR
WOS研究方向	Thermodynamics ; Physics
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000494888800001
资助机构	China Postdoctoral Science Foundation ; Fundamental Research Funds for the Central Universities ; Youth Innovation Promotion Association Chinese Academy of Science ; Chinese Academy of Science Light of West China Program
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/141537]
专题	中国科学院近代物理研究所
通讯作者	Guan, Mingzhi
作者单位	1.Huizhou Univ, Sch Elect Informat & Elect Engn, Huizhou 516000, Peoples R China 2.Lanzhou Univ, Coll Civil Engn & Mechan, Key Lab Mech Western Disaster & Environm, Minist Educ,Key Lab Special Funct Mat & Struct De, Lanzhou 730000, Gansu, Peoples R China 3.Lanzhou Jiaotong Univ, Sch Math & Phys, Lanzhou 730070, Gansu, Peoples R China 4.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Gao, Peifeng,Wei, Xiao-ping,Wu, Beimin,et al. Numerical investigation on decreasing radial stress in epoxy impregnated REBCO pancake coils by overband[J]. CRYOGENICS,2019,103:6.
APA	Gao, Peifeng.,Wei, Xiao-ping.,Wu, Beimin.,Xin, Canjie.,Liao, Tianfa.,...&Guan, Mingzhi.(2019).Numerical investigation on decreasing radial stress in epoxy impregnated REBCO pancake coils by overband.CRYOGENICS,103,6.
MLA	Gao, Peifeng,et al."Numerical investigation on decreasing radial stress in epoxy impregnated REBCO pancake coils by overband".CRYOGENICS 103(2019):6.