Materials pp 371-377 | Cite as

Cryogenic Fatigue Testing of Glass Reinforced Epoxy Tubes

  • M. K. Abdelsalam
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 38)

Abstract

In superconductive magnetic energy storage (SMES) units, cold to warm struts are required to transmit the magnetic radial load from the 1.8 K helium dewar surface to the 300 K vacuum vessel surface with a minimum heat leak. Glass reinforced epoxy tubes are proposed for such struts. Subscale samples of strut material and configuration are tested. Ultimate compressive strength testing at both ambient and liquid nitrogen temperatures in addition to the compression-compression fatigue life at 77 K are reported. Scanning electron micrographs of the failed specimens are discussed. The average ultimate compressive strength at 77 K is 128 ksi, about 50% higher than room temperature strength. The low temperature fatigue life at a stress level of 60% of the ultimate strength exceeds one half million cycles.

Keywords

Fatigue Life Ultimate Load Ultimate Compressive Strength Composite Tube Room Temperature Strength 
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 1992

Authors and Affiliations

  • M. K. Abdelsalam
    • 1
  1. 1.Applied Superconductivity CenterUniversity of WisconsinMadisonUSA

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