Sensitivity of Fatigue Crack Growth Prediction (Using Wheeler Retardation) to Data Representation

    Volume 17, Issue 2 (March 1989)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 7


    Finney, JM
    DSTO Aeronautical Research Laboratory, Melbourne,

    (Received 21 March 1988; accepted 25 August 1988)

    Abstract

    Using the Wheeler model for predicting fatigue crack growth as a case study, the likely errors in prediction from selecting literature calibration values are examined. From four methods of representing the same da/dN - δK data, errors in crack life prediction up to a factor of about three were obtained.

    Because calibration values are stress scale dependent, the influence of interpolations and extrapolations on predicted crack growth life is also examined. Large extrapolations may lead to errors in predicted life, also approaching a factor of three.


    Paper ID: JTE11092J

    DOI: 10.1520/JTE11092J

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    Author
    Title Sensitivity of Fatigue Crack Growth Prediction (Using Wheeler Retardation) to Data Representation
    Symposium , 0000-00-00
    Committee E08