fatigue strength constant cumulative damage
fatigue strength index fatigue damage state of 1st stage loading
fatigue life fatigue damage state of 2rd stage loading
the number of cycle new equivalence equation
equivalence equation applied stress
fatigue driving stress function applied stress of 1st stage loading
fatigue life of 1st stage loading applied stress of 2nd stage loading
the number of cycle of 1st stage loading equivalent driving stress of 1st stage loading
fatigue driving stress function of 1st stage loading critical fatigue driving stress
fatigue life of 2nd stage loading equivalent driving stress of 2nd stage loading
the equivalent number of cycle of 2nd stage loading applied stress of 3rd stage loading
the number of cycle of 2nd stage loading equivalent driving stress of 3rd stage loading
fatigue life of 3rd stage loading applied stress of ith stage loading
the equivalent number of cycle of 3rd stage loading equivalent driving stress of ith stage loading
the number of cycle of 3rd stage loading temperature-dependent fatigue strength coefficient
fatigue life of ith stage loading the new equivalent number of cycle of 2nd stage loading
the number of cycle of ith stage loading ratio of 1st and 2nd stage loading stresses
damage of ith stage loading ratio of i-1th and ith stage loading stresses