Abstract: The aim of this study is to investigate the impact of applying stress sequence in the form of discrete values of ascending and descending order of the same range on the behaviour of damage. The behaviour of the crack propagation as well as the lifetime of structure is investigated when M, which is the power value in the crack propagation Paris-Erdogan model is taken to be equal to three (M = 3). It is found that bigger stress or loadings imposed on the structure at the beginning of its life will result in a bigger damage. As a result, the lifetime of the structures is shorter as compared to the one which starts with lower stress.