The description of DS at the sub-ppm level will require new terminology. Hysteresis on thermal cycling is a major variable in the DS description of materials at the ppm and sub-ppm level. In addition, CTE is not a very useful tool in the description of dimensional stability at the sub-ppm level. Materials with zero quasi-static CTE behave as if they had a CTE of several ppm/K when the thermal gradients are present. Thermal fluctuations limit the ultimate DS of all materials. Two phase 'zero CTE' materials have additional severe limitations on the ultimate CTE. In non-equilibrium conditions 'zero CTE' materials behave as if they had the CTE nearly equal to double the CTE of the stiffest phase.


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    Title :

    Theoretical limits of dimensional stability for space structures


    Additional title:

    Theoretische Grenzen der Dimensionsstabilität für Weltraumstrukturen


    Contributors:
    Dolgin, B.P. (author) / Moacanin, J. (author) / O'Donnell, T. (author)


    Publication date :

    1991


    Size :

    11 Seiten, 4 Tabellen, 4 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English






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