STP1309: Unloading-Reloading Sequences and the Analysis of Mechanical Test Results for Continuous Fiber Ceramic Composites

    Steen, M
    Research Officers, Institute for Advanced Materials, Joint Research Centre, European Commission, ZG Petten,

    Vallés, JL
    Research Officers, Institute for Advanced Materials, Joint Research Centre, European Commission, ZG Petten,

    Pages: 17    Published: Jan 1997


    Abstract

    The introduction of intermittent unloading — reloading cycles during mechanical testing is an extremely powerful tool to assist in the interpretation of the mechanical response of a material to the imposed loading conditions. This technique has a potential as a probing method in material characterization which has been vastly underestimated, particularly in the case of continuous-fiber ceramic composites (CFCCs), where, in addition to helping in the description of damage development, it can yield important information on fiber-matrix interfacial phenomena as well. The present contribution highlights the results obtained from the incorporation of unloading-reloading cycles during uniaxial strength, creep and fatigue tests on selected 2D woven CFCCs at room and elevated temperatures. Some implications for the modeling of the mechanical behavior are indicated.

    Keywords:

    continuous-fiber ceramic composites, unloading-reloading cycles, hysteresis, residual stress, damage accumulation, creep, fatigue, ratchetting


    Paper ID: STP11813S

    Committee/Subcommittee: C28.01

    DOI: 10.1520/STP11813S


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