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Research on Fatigue Life Prediction and Reliability of High Strength and Toughness Aluminum Alloys

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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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Acknowledgments

This work was financially supported by the Natural Science Foundation of Hunan Province (2018JJ4060), China Students’ Project for Innovation and Entrepreneurship Training (201811535021) and Hunan Province College Students’ Research Learning and Innovative Experiment Project (2018660).

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Authors and Affiliations

  1. College of Metallurgy and Material Engineering, Hunan University of Technology, Zhuzhou, 412007, China

    Haigen Jian, Xiaomei Yang, Yedong Wang, Xinlei Lei, Wei Zhang & Chengji Mi

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  1. Haigen Jian
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  2. Xiaomei Yang
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  3. Yedong Wang
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  4. Xinlei Lei
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  5. Wei Zhang
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Correspondence to Chengji Mi.

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Jian, H., Yang, X., Wang, Y. et al. Research on Fatigue Life Prediction and Reliability of High Strength and Toughness Aluminum Alloys. J Fail. Anal. and Preven. 20, 1399–1407 (2020). https://doi.org/10.1007/s11668-020-00946-2

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  • DOI: https://doi.org/10.1007/s11668-020-00946-2

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