On fatigue stress-cycle curves of carbon, glass and hybrid carbon/glass-reinforced fibre metal laminates

In this paper, theoretical predictions of static and fatigue strength were performed and validated experimentally of conventional and carbon/glass fibres reinforced hybrid fibre metal laminates (FMLs). It was found, that the hybrid glass/carbon FMLs are featured by lower static but higher fatigue strength than glass reinforces laminates currently using in aircraft. The potential for fatigue resistance was proposed as a new comparable parameter describing global fatigue response of the laminates. It was theoretically predicted and experimentally confirmed that the fatigue degradation of laminates is governed by either composite failure or aluminium fatigue, depending on the loading magnitude.