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    STP734

    Mechanical Characterization of PMR-15 Graphite/Polyimide Bolted Joints

    Published: 0


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    Abstract

    Design-allowable data characterizing the static strength and viscoelastic performance of PMR-15/Celion 6000 graphite/polyimide composite bolted joints are presented. Two laminate configurations in the [0i/±45j/90k]ns family, one-fiber-dominated and one matrix-dominated, were studied. Temperature-dependent strength characteristics were measured over the 21 to 315°C temperature range for several joint geometries. Effects of strain rate on strength and failure mode behavior were assessed at room temperature for rates ranging between 0.002 and 1.00 s−1. Creep behavior was examined for the case of bearing deformations at temperatures of 21 and 177°C. Ultrasonic inspection techniques were used to assure material integrity and to verify post test damage and failure mode.

    Keywords:

    graphite/polyimide, composite material, bolted joint, ultrasonic inspection, creep, strain rate sensitivity


    Author Information:

    Wilson, DW
    Research associate II, director, and graduate student, University of Delaware, Newark, Del.

    Pipes, RB
    Research associate II, director, and graduate student, University of Delaware, Newark, Del.

    Riegner, D
    Project engineer, General Motors Manufacturing Development, Detroit, Mich.

    Webster, J
    Research associate II, director, and graduate student, University of Delaware, Newark, Del.


    Committee/Subcommittee: D30.05

    DOI: 10.1520/STP29311S