Fatigue Crack Prediction of LC9 with Corrosion Damage Considering Effect of Load Frequency

Xu Dong Li; Zhi Tao Mu; Wen Sheng Sun

doi:10.4028/www.scientific.net/AMR.842.374

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 842Fatigue Crack Prediction of LC9 with Corrosion...

Fatigue Crack Prediction of LC9 with Corrosion Damage Considering Effect of Load Frequency

Abstract:

Considering the degradation effect of corrosion damage on fatigue behavior of aero aluminum alloy, the present thesis made a research on corrosion fatigue crack growth rate. Taking into account the effect of load frequency on fatigue crack growth, a concept of corrosion fatigue frequency factor is proposed. Based on the fact that low frequency will lead to high corrosion fatigue crack growth rate, and frequency higher enough will make little difference between corrosion fatigue and pure mechanical fatigue behavior, an exponential expression of corrosion fatigue frequency factor is proposed. The crack growth rate prediction from proposed formula is proved to be in good agreement with experimental results for steadily extended corrosion fatigue crack.

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Periodical:

Advanced Materials Research (Volume 842)

Pages:

374-377

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.842.374

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Online since:

November 2013

Authors:

Xu Dong Li*, Zhi Tao Mu, Wen Sheng Sun

Keywords:

Corrosion Fatigue, Crack Propagation, Load Frequency

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* - Corresponding Author

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