PSI - Issue 2_A

R. Hannemann et al. / Procedia Structural Integrity 2 (2016) 2527–2534 R. Hannemann et al. / Structural Integrity Procedia 00 (2016) 000–000

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4. Conclusion

In this work, an extensive study of di ff erent influences on the SIF of two points of the crack front of a semi-elliptical surface crack in a shouldered solid shaft has been performed. The influence of the stress concentration factor, bending load and press-fit load for di ff erent crack geometries on the SIF solution was examined. The calculation of the SIF solution was done by the MVCCI-method. It has been shown that the crack geometry, the design of the transition radius (di ff erent stress concentration factors) and the load case has a major e ff ect on the SIF solution. Especially the press-fit load has a great influence on the SIF solution depending on the value of the bending load. Furthermore, the influence of the stress concentration factor and the load situation on the e ff ect of crack breathing in a rotating shaft was studied for one crack geometry. This analysis shows, that the press-fit load is dominant in higher regions of the rotating angle of the shaft and is crucial for the SIF solution. Additional investigations with various crack geometries will be performed to analyse this e ff ect. The obtained numerical results will be used for analytical crack propagation calculation. The results of the analyt ical concepts will be validated with experimental results of rotating bending fatigue tests.

Acknowledgements

The authors gratefully acknowledge the financial support of this research project S047 / 10029 / 2013 provided by the Karl-Vossloh foundation in Essen, Germany.

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