Cumulative damage prediction in materials under random loading using a stress-strain response model

An estimation of cumulative damage for random loading conditions is described in the paper. The basis of the method consists of specification of a comparative amplitude of the harmonic cycle with zero stress and strain mean values. Using a rainflow multidecomposition, the procedure allows us to predict a cumulative damage without identification of the complete time loading history. The submitted method enables us to extrapolate the fatigue life prediction under harmonic loading for any complex random loading spectrum.