A Life Prediction Methodology for Thick Section Composites Used in Civil Infrastructure

    Volume 22, Issue 4 (October 2000)

    ISSN: 0884-6804

    CODEN: CTROAD

    Page Count: 8


    Lesko, JJ
    Graduate research assistant and assistant professors, Virginia Tech, Blacksburg, VA

    Senne, J
    Graduate research assistant and assistant professors, Virginia Tech, Blacksburg, VA

    Case, SW
    Graduate research assistant and assistant professors, Virginia Tech, Blacksburg, VA

    Abstract

    As fiber-reinforced polymer (FRP) composites find application in highway bridge structures, methodologies for describing their long-term performance under service loading will be a necessity for designers. The designer of FRP bridge structures will be faced with out-of-plane damage and delamination at ply interfaces. The damage most often occurs between hybrid plys and dominates the lifetime response of a thick-section FRP structure. In this paper a model is developed to address these issues. The methodology employs the quadratic delamination initiation failure criteria, in conjunction with a delamination growth law to describe the out-of-plane damage under bending. These phenomena are combined with the critical element residual strength life prediction tool to determine remaining bending stiffness and moment capacity of a pultruded and hybrid FRP 20.3-cm-deep structural shape. The model successfully describes the onset of delamination prior to fiber failure and suggests that out-of-plane failure controls the life of the structure.


    Paper ID: CTR10546J

    DOI: 10.1520/CTR10546J

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    Author
    Title A Life Prediction Methodology for Thick Section Composites Used in Civil Infrastructure
    Symposium , 0000-00-00
    Committee D30