Abstract
ABSTRACT For the fatigue life prediction of titanium alloy welded structures used in deep-sea submersibles, a modified model considering the welding characteristics and the load sequence effect is established in this paper. Based on the modified model, the fatigue crack propagation behaviour of the new titanium alloy welded structure under different loading conditions is predicted. The comparison between the prediction results and the test data is analyzed. The prediction ability of the modified model over the conventional model is comparatively analyzed. The results show that the modified model has a strong ability to predict the fatigue crack propagation behaviour of new titanium alloy welded structures under various load spectra.
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