论文信息 - THE SIGNIFICANCE OF MEAN STRESS ON THE FATIGUE CRACK GROWTH THRESHOLD FOR MIXED MODE I + II LOADING

THE SIGNIFICANCE OF MEAN STRESS ON THE FATIGUE CRACK GROWTH THRESHOLD FOR MIXED MODE I + II LOADING

The effect of mean stress on near threshold fatigue crack growth behaviour under mixed mode I+II loading has been studied in a structural steel BS436O SOD in laboratory air at room temperature. It was found that the branch crack threshold decreased significantly as R ratio (P min /P max ) increased from 0.1 to 0.7. A simple model is proposed to predict the branch crack threshold behaviour for R-ratio sensitive materials. Further investigation is required to model the mode II dominant situations where the branch crack thresholds tend to converge on a high value

John R. Yates | M. W. Brown | J. Tong

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