Effects of Thickness on Plasticity-Induced Fatigue Crack Closure: Analysis and Experiment

    Published: Jan 1999

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    The crack-opening stress was measured using a strain gage technique on 7050 aluminum alloy, under constant amplitude and repeated overload. The behavior of crack-opening stress predicted by Newman's FASTRAN-II is consistent with the experimental results for repeated overload. It is also found that the FASTRAN-II program is capable of predicting crack growth on the 7050-T76 aluminum plate and 7050-T7452 aluminum hand forging under complex simulated flight loading which contains a significant number of compression cycles.


    fatigue crack closure, crack opening stress, aluminum forging, compression cycles, strain gage

    Author Information:

    Hsu, C
    The Boeing Company, Long Beach, CA

    Chan, KK
    The Boeing Company, Long Beach, CA

    Yu, J
    The Boeing Company, Long Beach, CA

    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP15763S

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