Fatigue life prediction based on crack propagation and acoustic emission count rates

摘要

The use of the acoustic emission technique to monitor fatigue crack propagation in steel compact tension specimens and T-section girders is described. Based on the correlations between crack propagation rates, acoustic emission count rates and stress intensity factor range procedures are suggested for predicting remaining fatigue life. It is anticipated that the experimental techniques and theoretical procedures developed will eventually be incorporated in a scientifically based methodology for the inspection, monitoring, assessment and repair of fatigue damaged structures.