An overview of NASA LaRC's research on thermal residual stresses and their effect on the dimensional stability of carbon fiber reinforced polymer-matrix composites is presented. The data show that thermal residual stresses can induce damage in polymer matrix composites and significantly affect the dimensional stability of these composites by causing permanent residual strains and changes in CTE. The magnitude of these stresses is primarily controlled by the laminate configuration and the applied temperature change. The damage caused by thermal residual stresses initiates at the fiber/matrix interface and micromechanics level analyses are needed to accurately predict it. An increased understanding of fiber/matrix interface interactions appears to be the best approach for improving a composite's resistance to thermally induced damage.


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    Title :

    Residual thermal stresses in composites for dimensionally stable spacecraft applications


    Additional title:

    Rest-Thermospannungen in Verbundwerkstoffen für dimensionsstabile Anwendungen in Raumfahrzeugen


    Contributors:
    Bowles, D.E. (author) / Tompkins, S.S. (author) / Funk, J.G. (author)


    Publication date :

    1992


    Size :

    9 Seiten, 14 Bilder, 3 Tabellen, 10 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





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