Abstract
This paper presents a different approach for the estimation of fatigue life duration of notched shafts. The traditional approach, which is based on the notch radius and the stress concentration factor, is not applicable for all stress concentration geometries, for example shafts with key-seats.
On the other hand, the volumetric approach gives a good estimation of fatigue life duration in all cases, especially in the case of shafts with key-seats. The basis of this approach is that the fatigue failure necessitates a physical volume. This volume is limited by the minimum of the relative stress gradient, and all the stress points in this volume play a role in fatigue failure. This role depends not only on stress value at this point, but also on the distance from the notch tip and on the stress gradient. The use of the stress gradient in the volumetric approach can explain the scale effect and the loading mode.
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© 2001 Springer Science+Business Media Dordrecht
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Kadi, N. (2001). Notch Effect in High Cycle Fatigue. In: Pluvinage, G., Gjonaj, M. (eds) Notch Effects in Fatigue and Fracture. NATO Science Series, vol 11. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0880-8_13
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DOI: https://doi.org/10.1007/978-94-010-0880-8_13
Publisher Name: Springer, Dordrecht
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