Development of a new approach for corrosion-fatigue analysis of offshore steel structures

Corrosion-fatigue is known to be the dominant failure mechanism in offshore structures, such as wind turbines, due constant exertion of cyclic loads highly corrosive environments. In present study, existing corrosion-fatigue crack growth (CFCG) theories and models have been firstly reviewed discussed, subsequently a new approach has proposed accurately describe behaviour under various loading conditions frequencies. To examine validity approach, fatigue experiments were conducted on S355G10+M medium strength steel compact tension, C(T), specimens at different load levels The experimental data initially analysed using traditional fracture mechanics parameter ?K which was shown limitations elucidating effects frequency CFCG rates range 0.2–0.5 Hz. Therefore, developed that allows these seen accounted for more clearly. Furthermore, model developed, introduced parameter, predicting seawater from short-term test air. found correlate well with this study S355J2+N structural available literature.