Shear/Compressive Tests for ITER Magnet Insulation

  • N. J. Simon
  • E. S. Drexler
  • R. P. Reed
Part of the An International Cryogenic Materials Conference Publication book series (ACRE, volume 40)

Abstract

Some insulation for ITER superconducting magnets will be subjected to simultane­ous shear and compressive stresses. The shear/compressive failure envelope of G-11CR, a standardized, but not radiation-resistant, epoxy/fiberglass insulation has been measured at 76 K. A test technique with miniature specimens was employed so insulation could be screened for radiation resistance. Significant differences are reported in the shear strength and shear/compressive failure envelope obtained with this technique and with other shear and shear/compressive measurement techniques.

Keywords

Shear Strength Test Fixture Failure Envelope Interlaminar Shear Strength Sandwich Specimen 
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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References

  1. 1.
    T. Okada and S. Nishijima, Investigation of interlaminar shear behavior of organic composites at low temperatures, Adv. Cryo. Eng.—Mat. 36: 811 (1990).Google Scholar
  2. 2.
    Y. Yasuda, T. Hirokawa, Y. Iwasaki, S. Nishijima, and T. Okada, Compressive strength under shear stress on 3d-frp at cryogenic temperature, Adv. Cryo. Eng.-Mat. 36: 985 (1990).Google Scholar
  3. 3.
    T. J. McManamy, G. Kanemoto, and P. Snook, Insulation irradiation test programme for the corn pact ignition tokamak, Cryogenics 31: 277 (1991).CrossRefGoogle Scholar
  4. 4.
    T. J. McManamy, J. E. Brasier, and P. Snook, Insulation interlaminar shear strength testing with compression and irradiation, p. 342 in “Proc. IEEE 13th Symposium on Fusion Engineering,” vol. 1, IEEE, New York (1990).Google Scholar
  5. 5.
    N. J. Simon, R. P. Reed, and R. P. Walsh, Compression and shear tests on vacuum-impregnated composites at cryogenic temperatures, Adv. Cryo. Eng.- Mat. 38: 363 (1992).Google Scholar
  6. 6.
    E. S. Drexler, N. J. Simon, and R. P. Reed, Shear-compressive properties of vacuum-impregnated insulation at 76 K, Cryogenics 32: 22 (1992).Google Scholar
  7. 7.
    R. Poehlchen et al., The mechanical strength of irradiated electric insulation, Adv. Cryo. Eng.-Mat. 36: 893 (1990).Google Scholar
  8. 8.
    J. R. Benzinger, Manufacturing capabilities of CR-grade laminates, Adv. Cryo. Eng.-Mat. 26: 252 (1980).CrossRefGoogle Scholar
  9. 9.
    M. B. Kasen, G. R. MacDonald, D. H. Beekman, and R. E. Schramm, Mechanical, electrical, and thermal characterization of G-10CR and G-11CR glass cloth/epoxy laminates between room temperature and 4 K, in: Materials Studies for Magnetic Fusion Energy Application at Low Temperatures-III, Ed. R. P. Reed, Nat. Bur. Stands. ( U.S.) Interagency Report 80–1627, (1980).Google Scholar
  10. 10.
    R. P. Reed, J. B. Dan, and J. B. Schutz, Short-beam shear testing of candidate magnet insulators, Cryogenics 32: 9 (1992).CrossRefGoogle Scholar
  11. 11.
    T. J. McManamy, ORNL, Oak Ridge, TN, private communication (1991).Google Scholar
  12. 12.
    N. J. Simon, A review of irradiation effects on inorganic-matrix insulators, Nat. Inst. Stands. Tech. (U.S.) Interagency Report 3999, (1993). Figure A.8–13.Google Scholar

Copyright information

© Springer Science+Business Media New York 1994

Authors and Affiliations

  • N. J. Simon
    • 1
  • E. S. Drexler
    • 1
  • R. P. Reed
    • 2
  1. 1.National Institute of Standards and TechnologyBoulderUSA
  2. 2.Cryogenic Materials, Inc.BoulderUSA

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