Topic
Vibration fatigue
About: Vibration fatigue is a research topic. Over the lifetime, 3460 publications have been published within this topic receiving 46297 citations.
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TL;DR: In this article, a nonlinear continuum damage model based on the irreversible thermodynamics framework was presented to predict fatigue life at different loading frequencies and stress ratios, and the results showed that the model possesses a good ability of predicting fatigue life.
19 citations
TL;DR: In this article, a generic stochastic model for fatigue failure of cast iron components based on fatigue test data and a limit state equation based on the SN-curve approach and Miner's rule is presented.
Abstract: Fatigue failure is one of the main failure modes for wind turbine drivetrain components made of cast iron. The wind turbine drivetrain consists of a variety of heavily loaded components, like the main shaft, the main bearings, the gearbox and the generator. The failure of each component will lead to substantial economic losses such as cost of lost energy production and cost of repairs. During the design lifetime, the drivetrain components are exposed to variable loads from winds and waves and other sources of loads that are uncertain and have to be modeled as stochastic variables. The types of loads are different for offshore and onshore wind turbines. Moreover, uncertainties about the fatigue strength play an important role in modeling and assessment of the reliability of the components. In this paper, a generic stochastic model for fatigue failure of cast iron components based on fatigue test data and a limit state equation for fatigue failure based on the SN-curve approach and Miner’s rule is presented. The statistical analysis of the fatigue data is performed using the Maximum Likelihood Method which also gives an estimate of the statistical uncertainties. Finally, illustrative examples are presented with reliability analyses depending on various stochastic models and partial safety factors.
19 citations
TL;DR: In this article, a probabilistic framework is set up to assess the fatigue life of components of nuclear power plants, incorporating all kinds of uncertainties, such as those appearing in the specimen fatigue strength (number of cycles to failure of specimens), design margin factors (taking into account the size, surface finish and environmental effects), mechanical model (precisely, the uncertainty on the model input parameters) and the thermal loading).
19 citations
TL;DR: In this paper, the second-order cyclostationarity was used to detect and diagnose the fatigue damage of the stainless steel 316l subjected to low cycle fatigue (LCF), defined by repetitive cycling in a low stress and a short period.
19 citations
01 Jan 1972
19 citations