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Analysis Approach to Durability Based on Material Initial Fatigue Quality and S-N Curve |
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| Authors: | Yang and Nie Hong |
| Institution: | aCollege of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China bCollege of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
| Abstract: | Based on probabilistic fracture mechanics approach, a new concept of material initial fatigue quality (MIFQ) is developed. Then, the relation between S-N curve and crack propagation curve is studied. From the study, a new durability analysis method is presented. In this method, S-N curve is used to determine crack growth rate under constant amplitude loading and evaluate the effects of different factors on durability and then the structural durability is analyzed. The tests and analyses indicate that this method has lower dependence on testing, and higher accuracy, reliability and generality and is convenient for application. |
| Keywords: | probabilistic fracture mechanics approach durability S-N curve crack propagation rate initial fatigue quality |
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