The fatigue phenomenon process in structural elements and connections‎.‎ The tubular welded joints used in the construction of offshore structures can experience millions of variable amplitude load cycles during their service life‎.‎ Such fatigue loading represents a main cause of degradation in these structures‎.‎ As a result‎,‎ fatigue is an important consideration in their design‎.‎ Fatigue and Fracture Mechanisms of Offshore Structures present novel research and the results of wave‎-induced stress on the operational life of offshore structures‎.‎ Increasing oil consumption in the world and scarcity of land‎-oil resources due to political and economical reasons has caused offshore oil exploration and production to become a growing investigation field in the past six decades‎.‎ The analysis of structures to use energy deposits and other recourses‎,‎ or for other purposes‎,‎ in ocean environments requires a special consideration since environmental and loading conditions offshore are very complicated and contain large uncertainties‎.‎ Offshore structures are continuously subjected to random ocean waves producing stochastic loads that cause mainly fatigue failure in structural components‎.‎