ON STRESS INTERACTION IN FATIGUE AND A CUMULATIVE DAMAGE RULE Part Ⅰ. 2024 Aluminum and SAE 4340 Steel Alloys

摘要

The object of this investigation was to determine the effects of stress-interaction, under randomly varied exponentially distributed stress amplitudes representing gust and maneuver loads on aircraft wings, on the fatigue life of smooth 2024 aluminum and SAE 4340 steel alloy specimens. On this basis a quasi-linear cumulative damage theory supported by numerous test results is developed.