Braided to Net Section Graphite/Epoxy Composite Shapes

    Volume 10, Issue 2 (June 1988)

    ISSN: 0884-6804

    CODEN: CTROAD

    Page Count: 14


    Alper, JM
    Aerospace engineer, Naval Air Development Center, Warminster, PA

    Gause, LW
    Aerospace engineer, Naval Air Development Center, Warminster, PA

    Abstract

    The fabrication of braided-to-net-shape graphite/epoxy composites has been demonstrated for channel, cruciform, Tee, and hat section geometries. Resin impregnation, cure, and tooling methods were devised, which successfully combined dry-braided AS4 fiber preforms with neat 3501-6 resin to produce the various shapes. The local buckling, post-buckling, and crippling behavior of short thin-walled braided compression members were investigated. The braided composites displayed large scatter in their test data, which may be characteristic of this form of construction. Stiffener pull-off-strength of the braided tee-section approached the transverse strength of the braided composite. Handling during fabrication was much easier with the braid than with conventional prepreg. The braid required only ¼ the time used to layup and bag a similar channel specimen using identical tooling. The high cost of the orthogonal braiding process remains the major barrier to serious structural applications.


    Paper ID: CTR10128J

    DOI: 10.1520/CTR10128J

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    Author
    Title Braided to Net Section Graphite/Epoxy Composite Shapes
    Symposium , 0000-00-00
    Committee D30