This paper summarizes the results of experimental and numerical studies on the fatigue behavior of foam core carbon/epoxy composite sandwich (CS) beams at room temperature (RT) and low temperatures (down to -60 Degree Celsius) for their potential applicability in the hull materials of ships navigating in the Polar Regions. 4-point static flexural test results confirmed the clear effects of low temperatures on the stiffness, strength, elastic limit and brittleness of the CS beams. Core shear was found to be the dominant failure mode under fatigue loading conditions at -60 Degree Celsius. Significant increases in the useful fatigue life with brittle type core shear failure were observed at low temperatures by comparison with the corresponding RT behavior. Two approaches were used to investigate stiffness reductions during useful fatigue life. The static finite element analysis (FEA) explained the effects of skin stiffness on the crack initiation location under fatigue loading conditions.


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    Title :

    Characterization of fatigue damage in composite sandwich hull materials at low temperatures


    Contributors:


    Publication date :

    2007


    Size :

    10 Seiten, 11 Bilder, 1 Tabelle, 16 Quellen


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




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