Fatigue behavior of aircraft structural beams

W. S. Hyler, H. G. Popp, S. A. Gordon, H. J. Grover, D. N. Gideon
naca-tn-4137
Jan 1958


This investigation involved a study of the correlation of composite structural fatigue behavior, basic material, and simple-element behavior. Fatigue and related static tests were made on aluminum-alloy box beams and I-beams and also on elements simulating key failure locations in the two beams. The study indicates that the simulation approach will be useful for those cases where it is possible to assess reasonably factors contributing to stress-raisers in the structure. The more complex the secondary stress picture becomes, the more exacting will be the requirements of the stress analysis.

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