STP569

    Debond Propagation in Composite-Reinforced Metals

    Published: Jan 1975


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    Abstract

    Strain energy release rates were used to correlate cyclic debonding between metal sheets and composite reinforcement. An expression for the strain energy release rate was derived and applied to fatigue test results for three material systems: graphite bonded to aluminum with both a room temperature and an elevated temperature curing adhesive; and, S-glass bonded to aluminum with an elevated temperature curing adhesive. For each material system, specimens of several thicknesses were tested with a range of fatigue loads. Cyclic debonding was monitored using a photoelastic technique. A close correlation was found between the observed debond rates and the calculated strain energy release rates for each material system.

    Keywords:

    fatigue tests, fatigue (materials), adhesive bonding, composite materials, structural engineering


    Author Information:

    Roderick, GL
    Aerospace technologists, United States Army Air Mobility Research and Development Laboratory-Langley Directorate, National Aeronautics and Space Administration, Langley Research Center, Hampton, Va.

    Everett, RA
    Aerospace technologists, United States Army Air Mobility Research and Development Laboratory-Langley Directorate, National Aeronautics and Space Administration, Langley Research Center, Hampton, Va.

    Crews, JH
    Aerospace technologist, National Aeronautics and Space Administration, Langley Research Center, Hampton, Va.


    Paper ID: STP33179S

    Committee/Subcommittee: E08.09

    DOI: 10.1520/STP33179S


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