This work deals with the development of a new approach to a high-cycle fatigue lifetime prediction, which is made in the stochastic framework and allows taking into account the natural degradation (aging) of material properties. Degradation of properties has been modeled as a process of the reduction of fatigue (endurance) limit. Kinetics of damage accumulation is introduced in the context of the effective stress concept. Mathematical expectation, correlation function and the continuum damage parameter variance have been obtained as functions of time. Analysis of the influence of natural aging process on statistical parameters of damage accumulation as well as on the lifetime has been carried out.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.