STP864

    Toward Process Optimization by Monitoring the Electrical Properties During the Cure Cycle for CFRP

    Published: Jan 1985


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    Abstract

    Application of advanced composite materials, namely carbon fiber reinforced plastic (CFRP) (graphite/epoxy) to aerospace structures is currently expanding from simple components to complex-shape integrated structures. The objective of this study is to establish the feasibility of optimizing the cure cycle of integrated CFRP structure by in-process direct measurement of electrical properties of the article in an autoclave.

    An instrumentation technique that included material and shape of electrodes and an insulator and bleeder system was investigated. Experimental studies using the above test setup attempted to determine correct pressurization timing under certain preprogrammed heating patterns thus resulting in cured CFRP laminates, which were practically voidless, with proper fiber volume fraction and thickness per ply.

    Keywords:

    carbon fiber reinforced plastic (graphite/epoxy), in-process monitoring, dielectrometry, electric resistance, pressurization timing


    Author Information:

    Minoda, Y
    R&D Institute of Metals and Composites for Future Industries, Tokyo,

    Sakatani, Y
    Nagoya Aircraft Works, Mitsubishi Heavy Industries, Ltd., Nagoya,

    Yamaguchi, Y
    Nagoya Aircraft Works, Mitsubishi Heavy Industries, Ltd., Nagoya,

    Niizeki, M
    Aircraft Div., Fuji Heavy Industries, Ltd., Utsunomiya, Tochigi,

    Saigoku, H
    Aircraft Div., Fuji Heavy Industries, Ltd., Utsunomiya, Tochigi,


    Paper ID: STP32809S

    Committee/Subcommittee: D30.05

    DOI: 10.1520/STP32809S


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