Fatigue tests of HTS coils

Author

Yazawa, Takashi ; Tosaka, Taizo ; Kuriyama, Toru ; Kuwano, Katsuyuki ; Igarashi, Motohiro ; Terai, Motoaki

Author_Institution

Power & Ind. Syst. R&D Center, Toshiba Corp., Yokohama, Japan

Volume

14

Issue

2

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

1214

Lastpage

1217

Abstract

This paper presents and discusses experimental results for mechanical performance of HTS coils with epoxy impregnation. Though mechanical characteristics of Ag-sheathed Bi2223 tape conductors have been investigated by various research organizations, there are few reports on those for HTS coils. Experiments on static hoop stress as well as experiments on repetitive hoop stress were performed. The critical static hoop stress obtained at 4.2 K was found to be 1.4 ∼ 1.6 times higher than the critical tensile stress of the conductor. The coil did not deteriorate after 10⁴ times loading of 70% of the critical hoop stress.

Keywords

fatigue testing; high-temperature superconductors; superconducting coils; tensile testing; 4.2 K; Ag-sheathed Bi2223 tape conductors; Bi₂Sr₂Ca₂Cu₃O₁₀-Ag; HTS coils; critical hoop stress; critical tensile stress; epoxy impregnation; fatigue tests; mechanical characteristics; mechanical performance; repetitive hoop stress; static hoop stress; Conductors; Fatigue; High temperature superconductors; Magnetic levitation; Magnetic liquids; Nitrogen; Superconducting coils; Superconducting magnets; Tensile stress; Testing; Degradation; HTS coil; fatigue; hoop stress;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2004.830533

Filename

1325016