Hoop stress test of GdBa2Cu3Oy coated conductor

Gen Nishijima, Kazuhiro Minegishi, Satoshi Awaji, Kazuo Watanabe, Teruo Izumi, Yuh Shiohara

研究成果: Article査読

9 被引用数 (Scopus)

抄録

Mechanical property of GdBa2Cu3Oy(GdBCO) coated conductor was investigated at 4.2 K in a magnetic field by two ways, which are the tensile test and the hoop stress test. The tensile stress/strain dependence of critical current (Ic) of a 2 mm width conductor was explored at 4.2 K, 18 T. The result provided that Ic-reversible strain limit existed in between 0.43% and 0.46%, corresponding to 907 MPa and 960 MPa in stress, and the elastic constant was 203 GPa. The hoop stress test has been performed at 4.2 K, 11 T. A test coil was fabricated by winding a 5 mm width conductor on a 270 mm diameter GFRP bobbin by 1.5 turns. The maximum value of applied hoop stress, which was deduced from a product of magnetic field, current density and coil radius, was 1322 MPa. Five strain gauges glued on the conductor surface showed almost the same values, which were in a range of 0.64% to 0.67%, indicating the uniform longitudinal deformation. Furthermore, the hoop stress-strain characteristics were linear, suggesting an elastic deformation. The deduced elastic constants were in a range of 196-204 GPa. It was confirmed that the GdBCO coated conductor performance was deteriorated irreversibly by 1322 MPa hoop stress, whereas not by 1302 MPa hoop stress.

本文言語English
論文番号5629453
ページ(範囲)3094-3097
ページ数4
ジャーナルIEEE Transactions on Applied Superconductivity
21
3 PART 3
DOI
出版ステータスPublished - 2011 6

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 電子工学および電気工学

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