Abstract
The propagation life of short cracks has a great influence on the accurate fatigue life prediction. A new crack growth model is proposed to provide a unified modeling framework for integrating short and long crack propagation in the formulation of the crack driving force to account for multiple crack growth controlling parameters. Crack propagation rates and fatigue lives predicted by the model are compared with crack growth and fatigue life data sets of 2024-T3, 7075-T561 aluminum and Ti-6Al-4V titanium alloys. Predicted results are found to be in good agreement with crack growth data and fatigue life data for these materials.
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