Mechanics of a Composite Structure of GFRP Insulators and Superconductors with a GAP

  • H. Tamura
  • S. Imagawa
  • A. Nishimura
  • J. Yamamoto
  • Y. Shindo
Part of the Advances in Cryogenic Engineering Materials book series (ACRE, volume 42)

Abstract

Superconducting coils in large scale magnet applications such as the Large Helical Device (LHD) are subjected to large electromagnetic force at the interfaces between conductors and electrical insulators. The insulators do not always contact the superconductor surfaces completely. This may cause a reduction of coil rigidity. Nonlinear behavior was observed in the compressive load-displacement curves in some experiments of coil packs. The nonlinear curves were found to be well fitted by an exponential function. We considered this nonlinearity as a surface contact problem and devised some analytical models to evaluate the rigidity reduction in terms of gap length. The results of this analysis also support the exponential function.

Keywords

Glass Fiber Reinforce Plastic Helical Coil Superconducting Coil Coil Pack Fusion Engineer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • H. Tamura
    • 1
  • S. Imagawa
    • 1
  • A. Nishimura
    • 1
  • J. Yamamoto
    • 1
  • Y. Shindo
    • 2
  1. 1.National Institute for Fusion ScienceOroshi-cho, Toki-shi, GifuJapan
  2. 2.Tohoku UniversityAoba, Aramaki, Aoba-ku, Sendai 980Japan

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