Modelling of continuing damage for damage tolerance analysis

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Proceedings titleICAF 2011 Structural Integrity: Influence of Efficiency and Green Imperatives Proceedings of the 26th Symposium of the International Committee on Aeronautical Fatigue
Conference2011 International Committee on Aeronautical Fatigue (ICAF), 1-3 June 2011, Montreal, Canada
Pages231247; # of pages: 17
AbstractThis paper presents and compares two continuing damage modelling approaches: a simplified approach, which approximately models diametrical cracks as two independent radial cracks, and an improved approach that accurately models the interaction between the cracks. Stress intensity factor closed-form solutions were developed for the improved approach to accurately model continuing damage growth in a structure. Through several examples, it was shown that the simplified approach, commonly used by the aircraft industry, always resulted in smaller continuing damage sizes and shorter fatigue lives compared to the improved approach. For the tested cases, the continuing damage sizes calculated using the simplified approach were underestimated by up to 24 times and the fatigue lives were overestimated by up to 1.4 times.
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AffiliationNRC Institute for Aerospace Research; National Research Council Canada
Peer reviewedYes
NPARC number19830682
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Record identifier68f0941c-4928-4fb7-a1cb-e67fc6cfb9f3
Record created2012-04-19
Record modified2016-05-09
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