Longitudinal Compressive Failure Modes in Fiber Composites: End Attachment Effects on IITRI Type Test Specimens

    Volume 7, Issue 4 (December 1985)

    ISSN: 0884-6804

    CODEN: CTROAD

    Page Count: 7


    Chamis, CC
    Senior research engineer and former materials engineer, NASA Lewis Research Center, Cleveland, OH

    Sinclair, JH
    Senior research engineer and former materials engineer, NASA Lewis Research Center, Cleveland, OH

    Abstract

    The end-attachment effects on longitudinal compressive strength of IITRI type specimen unidirectional fiber composites are formally assessed using finite-element analysis (FEA) in conjunction with composite mechanics. Sixteen different cases were analyzed to evaluate end-attachment effects (such as degree of misalignment, type of misalignment, progressive end-tab debonding, and specimen thickness) on stress distribution, peak stresses, buckling loads, and buckling mode shapes. The results obtained from the FEA and comparisons with fractured specimens show that eccentricities induce bending-type stresses which peak near the end-tabs and cause flexural type fracture. Also, guidelines are included for placing back-to-back strain gages to measure the presence/absence of possible end-attachment and eccentricity effects.


    Paper ID: CTR10309J

    DOI: 10.1520/CTR10309J

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    Author
    Title Longitudinal Compressive Failure Modes in Fiber Composites: End Attachment Effects on IITRI Type Test Specimens
    Symposium , 0000-00-00
    Committee D30