Probabilistic fatigue models are required to account conveniently for the several sources of uncertainty arising in the prediction procedures, such as the scatter in material behavior. In this paper, a recently proposed stress-based probabilistic model is assessed using fatigue data available for the P355NL1 steel (a pressure vessel steel). The referred probabilistic model is a log-Gumbel regression model, able to predict the probabilistic Wo¨hler field (P-S-N field), taking into account the mean stress (or stress R-ratio) effects. The parameters of the probabilistic model are identified using stress-life data derived for the P355NL1 steel, from smooth specimens, for three distinct stress R-ratios, namely R = −1, R = −0.5 and R = 0. The model requires a minimum of two test series with distinct stress R-ratios. Since data from three test series is available, extrapolations are performed to test the adequacy of the model to make extrapolations for stress R-ratios other than those used in the model parameters assessment. Finally, the probabilistic model is used to model the fatigue behavior of a notched plate made of P355NL1 steel. In particular, the P-S-N field of the plate is modeled and compared with available experimental data. Cyclic elastoplastic analysis of the plate is performed since plasticity at the notch root is developed.
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ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference
July 18–22, 2010
Bellevue, Washington, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-49255
PROCEEDINGS PAPER
Probabilistic Fatigue Assessment of a Notched Detail Taking Into Account Mean Stress Effects Available to Purchase
Abi´lio M. P. De Jesus,
Abi´lio M. P. De Jesus
University of Tra´s-os-Montes and Alto Douro, Vila Real, Portugal
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M. Luisa Ruiz Ripoll,
M. Luisa Ruiz Ripoll
Delft University of Technology, Delft, The Netherlands
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Norberto J. Gonc¸alves,
Norberto J. Gonc¸alves
University of Tra´s-os-Montes and Alto Douro, Vila Real, Portugal
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He´lder F. S. G. Pereira
He´lder F. S. G. Pereira
UCVE, IDMEC – Po´lo FEUP, Porto, Portugal
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Abi´lio M. P. De Jesus
University of Tra´s-os-Montes and Alto Douro, Vila Real, Portugal
M. Luisa Ruiz Ripoll
Delft University of Technology, Delft, The Netherlands
Norberto J. Gonc¸alves
University of Tra´s-os-Montes and Alto Douro, Vila Real, Portugal
He´lder F. S. G. Pereira
UCVE, IDMEC – Po´lo FEUP, Porto, Portugal
Paper No:
PVP2010-25056, pp. 51-60; 10 pages
Published Online:
January 10, 2011
Citation
De Jesus, AMP, Ruiz Ripoll, ML, Gonc¸alves, NJ, & Pereira, HFSG. "Probabilistic Fatigue Assessment of a Notched Detail Taking Into Account Mean Stress Effects." Proceedings of the ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASME 2010 Pressure Vessels and Piping Conference: Volume 6, Parts A and B. Bellevue, Washington, USA. July 18–22, 2010. pp. 51-60. ASME. https://doi.org/10.1115/PVP2010-25056
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