Abstract
Most of the experimental fatigue tests were performed under constant amplitude loading. However, this type of loading is hardly present in an actual condition, for which the presence of variable amplitude loading or spectrum loading is seems vital. To present the effect of variable amplitude loading with respect to the fatigue failure of composite-based materials, thus, it is an idea to perform or to simulate the case using a set of block loading with various amplitude of low-high and high-low sequences. Perhaps, these sequences can be used for simulation and experimental purposes. In this paper, the authors discussed the effect of block loading towards the damage development in Fiber Metal Laminate (FML) composites. The simulation work was performed using the available stiffness degradation model, and the results were validated using the experimental data.