Support Elements with Negative Thermal Expansion

  • G. Hartwig
  • K. Endres
  • O. Haider
Part of the An International Cryogenic Materials Conference Publication book series (ACRE, volume 40)

Abstract

Support elements with a high capability of thermal insulation are necessary in many low temperature applications. In a number of cases a fatigue resistance is required and several designs are facilitated if the support elements are capable of compensating undesired thermal expansion. This means that the materials used exhibit a reasonable negative thermal expansion. Carbon fiber composites angle -plied at ± 30° yield a coefficient of thermal expansion approaching half that of steel but with a negative sign.1

The following investigations concentrate on the static and cyclic compressive strength of angle — plied carbon fiber tubes. An optimization is discussed which will allow a maximum compressive strength to be achieved at a maximum of negative thermal expansion. The compressive strength in all cases is higher than that of steel, even for ± 30° angle — plied composites.

Keywords

Compressive Strength Carbon Fiber Fiber Composite Support Element Negative Thermal Expansion 
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.
    Schwarz, G.; F. Krahn and G. Hartwig; Cryogenics 31, p 244 (1991)CrossRefGoogle Scholar
  2. 2.
    Okada, T.; B. Rugaiganisa and S. Nishijima; Advances of Cryogenic Engineering 36B, p. 1027, (1990), Plenum PressGoogle Scholar
  3. 3.
    Hartwig G.; Advances of Cryogenic Engineering 28, p. 179, (1982), Plenum PressGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1994

Authors and Affiliations

  • G. Hartwig
    • 1
  • K. Endres
    • 1
  • O. Haider
    • 2
  1. 1.Kernforschungszentrum KarlsruheInstitute for Material Research IIKarlsruheGermany
  2. 2.Eurocopter GmbHMünchen 80Germany

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