Abstract
Stochastic fatigue crack growth analyses have been performed using the experimental fatigue crack growth data obtained for the cracks initiated from metallurgical inclusions at the notch of the specimen, the AGARD short crack growth experimental data [1]. This investigation is not intended to analyse the feature of short crack growth behaviour, but to analyse the effect of the inclusion distribution on the time that the crack is initiated, and the consequent stochastic fatigue crack growth behaviour. The incremental stochastic crack growth analysis based on FFT [2] (fast Fourier Transformation) and Monte Carlo simulation has been made according to a two step differential stochastic fatigue crack growth model which assumes that the fatigue crack growth consists of a rapid and slow pulse process. The fatigue crack growth is simulated from an initial flaw size, which is the inclusion size, to a large crack size.
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