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The aim of this work is to develop a lifetime prediction model based oncontinuum damage mechanics that can unify the Low Cycle Fatigue (LCF) and HighCycle Fatigue (HCF) domains. The concept of an inclusion embedded in a matrix isused to describe the fact that plasticity is no more observable when the load is belowthe yield stress. A review of the localization rules used in the literature for damagemodeling is done and two new ones have been proposed. A numerical implementationallows us to calculate the responses of the inclusions for the different localization rules.Some calculations are presented under cyclic loadings.