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    Mechanical Behavior of a Fiber Reinforced Metal and Its Effect Upon Engineering Applications

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    A system consisting of silica fibers embedded in an aluminum matrix has been used to study the properties, behavior, and fabrication methods of a fiber reinforced metal. The stress strain behavior describes an open loop which becomes closed on subsequent stressing within the previously applied limit. The design modulus of the system cannot be determined by the summation of component elastic properties but is dependent upon plastic strain of the matrix. Fatigue behavior and damping properties are dictated by this hysteresis of the stress strain loop. Fiber orientation has a marked effect on strength; the experimental values agreeing extremely well with those predicted by theory. Up to 750 C, 90 per cent of the room-temperature strength is retained, and there is no evidence of creep deformations.

    Filament winding can be used to fabricate simple shapes such as rings or sheets from which more complicated structures can be fabricated. Most standard jointing techniques are not suitable for the composite although pressure welding is satisfactory.


    evaluation, material composites, metal matrix, silica, aluminum, hot pressing, stresses, strains, fiber orientation, fatigue, physical properties welding, brazing, soldering

    Author Information:

    Cratchley, D.
    now research engineer, Stanton and Staveley, Ltd., Near Nottingham, England

    Baker, A. A.
    Research scientists, Rolls Royce, Ltd., Derby,

    Jackson, P. W.
    Research scientists, Rolls Royce, Ltd., Derby,

    Committee/Subcommittee: D30.04

    DOI: 10.1520/STP43813S