ON STRESS INTERACTION IN FATIGUE AND A CUMULATIVE DAMAGE RULE PART II.7075 ALUMINUM ALLOY

摘要

The object of this investigation was the determina¬tion of the effects of stress interaction, under randomized stress distributions representing gust and maneuver loads on aircraft wings, on the fatigue life of 7075 aluminum alloy specimens.nOn the basis of numerous rotating bending fatigue tests it has been demonstrated that the linear cumulative damage rule does not provide a safe fatigue life estimate of un-notched specimens. A non-linear rule representing the test results fairly well has been proposed.