Abstract
According to the fatigue test statistical analysis method, the median S–N curve and the p-S–N curve with 99.9% survival rate of smooth specimens of high strength and toughness Al–Zn–Mg–Cu alloy are obtained. Based on these curves, the reliability analysis of test data under different stress amplitudes was analyzed. The finite element technique is used to simulate the stress intensity factor K, combined with fatigue crack growth rate test, using K criterion to predict and evaluate the safety and reliability of alloy materials and to serve for the service life design and fracture control of structural materials in fatigue service.
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