OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 1959 · 34 citations · 0 references
Natural SciencesMaterials EngineeringMaterials ScienceMaterials CharacterizationMechanical Behavior Of MaterialsStructural MaterialsElastic DeformationFatigueFracture MechanicsMechanical CharacterizationStrength Of MaterialsStress-strain BehaviorCumulative Damage AssessmentCumulative Damage ModelingFatigue LoadsFatigue TestingGust LoadsLoad Sequence EffectsVariable Amplitude FatigueVariable-amplitude Loading
Sheet specimens with theoretical elastic stress concentration factor KT = 4.0 were tested with the load amplitude held constant or varied by steps to approximate a gust loads history. The test data were analyzed assuming linear cumulative damage, and a limited statistical evaluation was used to confirm conclusions. The value of the summation of cycle ratios SIGMA n/N was found to vary with material, loading sequence, and mean stress. (auth)