Abstract
A thermography-based energetic damage model is put forward to rapidly evaluate the high-cycle fatigue behavior of welded joints subjected to fatigue loadings. The energy dissipation is calculated using the thermal signal, and then is used to create fatigue damage model. The model is extended to predict the damage accumulation of welded specimens. The predicted fatigue damage evolution is shown to be in good agreement with the results given by the existing models. Experiments are conducted to verify the applicability of the present model for residual life prediction. It is shown that the residual life under multistage loading is well predicted in comparison with the experimental life.
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