The report contains the results of an effort to optimize the format and procedures for conducting a parametric fatigue analysis of Air Force aircraft on a flight-by-flight basis. Parameters which affect the environmental loads and those which affect the resulting stresses are discussed. It is suggested that flights be divided into mission segments of taxi, ascent, cruise, descent, landing, etc., to take advantage of the standard operational procedures of the Air Force. Methods of calculating and presenting the parametric damage charts for each segment are presented for both heavy bomber and cargo aircraft and for fighter aircraft. It is suggested, to obtain a reasonable accuracy, that a statistical counting accelerometer with pilot controlled print-out be installed in all fighter aircraft. Results indicate that tabular formats are preferred to graphical formats for manual solution of large volumes of flights. It is concluded that a parametric analysis can be used to calculate the fatigue damage on a flight-by-flight basis and that the required pilot log information is now available. (Author)
Parametric Fatigue Analysis of USAF Aircraft
1967
212 pages
Report
Keine Angabe
Englisch
Aircraft , Fatigue(Mechanics) , Gust loads , Aerodynamic loading , Stresses , Airframes , Bomber aircraft , Fighter aircraft , Transport aircraft , Life expectancy , Replacement theory , Taxiing , Takeoff , Climbing , Descent , Aerodynamic characteristics , Recording systems , Failure(Mechanics) , Air force research , Accelerometers
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