Correlation of crack growth rate and stress ratio for fatigue damage containing very high cycle fatigue regime |
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| Authors: | Chengqi Sun Youshi Hong |
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| Institution: | State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | A model is proposed to correlate the crack growth rate and stress ratio containing very high cycle fatigue regime. The model is verified by the experimental data in literature. Then a formula is derived for the effect of mean stress on fatigue strength, and it is used to estimate the fatigue strength of a bearing steel in very high cycle fatigue regime at different stress ratios. The estimated results are also compared with those by Goodman formula. |
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| Keywords: | very high cycle fatigue crack growth rate stress ratio fatigue strength |
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