Lamb wave-based probabilistic fatigue life prediction for riveted lap joints

摘要

This study presents a Lamb wave-based probabilistic fatigue life prediction for riveted lap joints.First, a brief introduction is given for the experiment of Lamb wave-based damage detection.Three damage sensitive features (correlation coefficient, amplitude change and phase change) are employed to correlate the fatigue crack size with Lamb wave signal.Then the probability of detection (POD) method is used to couple the actual crack size with the model predictions using Lamb wave signal.Considering the uncertainties of the initial crack size and crack growth parameters, Bayesian method and Markov Chain Monte Carlo (MCMC) simulation are applied to obtain the probabilistic fatigue life.In order to verify the reliability of the proposed probabilistic fatigue life prediction procedure, one set of experimental data is used for validation purpose.