This paper proposes an analysis of variable amplitude fatigue data obtained for the P355NL1 steel, using a strain-based cumulative damage model. The fatigue data consist of constant and variable amplitude block loading which was applied to both smooth and notched specimens, previously published by the authors. The strain-based cumulative damage model is based on the growth and closure mechanisms of microcracks. It incorporates a parameter termed net effective strain range, which is a function of the microcrack-closure behaviour and inherent ability to resist fatigue damage. A simplified version of the model is considered which assumes crack closure at the lowest level for the entire spectrum and does not account for varying crack opening stresses. In general, the model produces conservative predictions within an accuracy range of two, for both smooth and notched geometries, demonstrating the robustness of the model.
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ASME 2008 Pressure Vessels and Piping Conference
July 27–31, 2008
Chicago, Illinois, USA
Conference Sponsors:
- Pressure Vessels and Piping
ISBN:
978-0-7918-4824-1
PROCEEDINGS PAPER
Analysis of Variable Amplitude Fatigue Data of the P355NL1 Steel Using the Effective Strain Damage Model
He´lder F. S. G. Pereira,
He´lder F. S. G. Pereira
UCVE, IDMEC, Porto, Portugal
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David L. DuQuesnay,
David L. DuQuesnay
Royal Military College of Canada, Kingston, ON, Canada
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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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He´lder F. S. G. Pereira
UCVE, IDMEC, Porto, Portugal
David L. DuQuesnay
Royal Military College of Canada, Kingston, ON, Canada
Abi´lio M. P. De Jesus
University of Tra´s-os-Montes and Alto Douro, Vila Real, Portugal
Paper No:
PVP2008-61771, pp. 87-96; 10 pages
Published Online:
July 24, 2009
Citation
Pereira, HFSG, DuQuesnay, DL, & De Jesus, AMP. "Analysis of Variable Amplitude Fatigue Data of the P355NL1 Steel Using the Effective Strain Damage Model." Proceedings of the ASME 2008 Pressure Vessels and Piping Conference. Volume 1: Codes and Standards. Chicago, Illinois, USA. July 27–31, 2008. pp. 87-96. ASME. https://doi.org/10.1115/PVP2008-61771
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