Assessment of Damage Tolerance Requirements and Analysis. Volume 3. Analytical Predictions and Correlations
Final technical rept. Sep 1982-Mar 1986
FAIRCHILD INDUSTRIES INC FARMINGDALE NY FAIRCHILD-REPUBLIC DIV
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Structural test program of typical aircraft structural configuration was conducted to assess the current Air Force damage tolerance design requirements defined in MIL-A-83444. The specimens, made of 2024-T3XX and 7075-T6XX, were subjected to randomized flight-by-flight spectra, representative of fightertrainer and bombercargo type loading spectra, respectively, and to constant amplitude loading spectrum. A total of seventy-two 72 specimens were tested. The test results were correlated with analytical predictions using crack growth and crack initiation methods. As a result of this study, recommendation is provided to the validity of MIL-A-83444, to develop guidelines for selection of critical crack locations, and to assess the state-of-the-art analytical capabilities in prediction crack growth and crack initiation time.
- Attack and Fighter Aircraft
- Training Aircraft