Deterministic and probabilistic creep–fatigue–oxidation crack growth modeling

摘要: Abstract Fatigue, creep, oxidation or their combinations have long been recognized as the principal mechanisms in many high-temperature failures power plant components, turbine engines, and exhaust systems vehicles. Depending on specific materials loading conditions temperature, role of each damage mechanism may change significantly, ranging from independent development to competing combined creep–fatigue, fatigue–oxidation, creep–fatigue–oxidation. In this paper a new linear superposition theory is proposed model cycle-dependent time-dependent creep–fatigue–oxidation crack growth phenomena. The can be reduced creep–fatigue fatigue–oxidation models previously developed by authors well as, under some assumptions, current widely used theory. limits advantages are clearly demonstrated with several worked examples. A general probabilistic analysis procedure also introducing uncertainties parameters fatigue, laws help Monte Carlo simulation.