F-111A Wing Fatigue Test Program
Final rept. 24 Mar 1971-10 Jul 1974
AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OH
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An F-111A wing was fatigue tested in the full stores configuration for evaluation of the wing, wing hard points, and fixed pylons. The spectrum consisted of nine test conditions with loads applied at three wing sweep ANGLES 25, 50, 72.5 degrees. The repeated application of these test conditions simulated 24,000 hrs of service 6 test lives. Upon completion of the six test lives, the spectrum was modified and cycling continued for an additional four test lifetimes 16,000 hrs. After completion of the 10th fatigue test lifetime, 65 limit load constant amplitude cycles were applied until failure occurred. The F-111A wing has a satisfactory fatigue life for the spectrum imposed upon it.
- Attack and Fighter Aircraft