Number of cycles of fluctuating stress and strain of a specified nature that a material will sustain before failure occurs. Fatigue life is a function of the magnitude of the fluctuating stress, geometry of the specimen and test conditions.
The number of cycles of stress that a band tool can sustain prior to failure for a stated test condition.
The number of cycles of stress that can be sustained prior to failure under a stated test condition.
Number of deflection cycles until failure occurs at a predetermined stress.