Application of variable equivalent amplitude for determination of fatigue life of elements subjected to block loading

This paper contains a proposition of new method determining the fatigue life elements subjected to non-stationary loads. The model was based on determination time-variable equivalent weighted amplitude. amplitude is derived continuous basis as arithmetic mean nth root amplitudes that occur up given time. analysis proposed carried out selected literature insights specimens made P91 and P92 steels. experimental tests were performed under block loading with zero value in conditions tension-compression small number cycles.