Definitions for "Endurance limit"
In fatigue testing, the number of cycles which may be withstood without failure at a particular level of stress.
The endurance limit is defined as the maximum applied cyclic stress amplitude for an 'infinite' fatigue life. Generally 'infinite' life means more than 10 cycles to failure.
The maximum stress below which a material can presumably endure an infinite number of stress cycles. If the stress is not completely reversed, the value of the mean stress, the minimum stress or the stress ratio also should be stated. Compare with fatigue limit.