Probabilistic modeling and sizing of internal defects in nondestructive inspection for fatigue damage prediction and structural integrity assessment

摘要

A method for probabilistic fatigue life prediction, comprising: obtaining a detection probability model; obtaining a probability density function of an initial crack size; obtaining a stochastic identification of a model parameter; and probability density of the model parameter Obtaining a function; obtaining a crack growth model based on a probability density function of the initial crack size; a probability density function of the model parameter; and a material / load factor; and determining uncertainty propagation Obtaining a fatigue life prediction based on the uncertainty propagation and the crack growth model.