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)


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.


Compressive Strength Carbon Fiber Fiber Composite Support Element Negative Thermal Expansion 
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  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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