The strain-based failure assessment diagram (SB-FAD) has been developed for predicting failure from flaws in components subjected to high plastic strains. In this paper, a combined numerical and experimental approach is used to apply the SB-FAD to predict failure from a series of API 5L grades X80 and X100 curved wide plate (CWP) specimens with shallow notches machined into the pipe girth weld. For the CWP specimens tested in this work, the SB-FAD in its unmodified form resulted in over-conservative predictions of failure. This is attributed to the SB-FAD assuming high constraint conditions and the presence of a sharp fatigue crack, whereas the CWP specimens tested in this work were low constraint and contained a shallow machined notch without fatigue cracks. A modification of the SB-FAD is then proposed to account for non-sharp defects loaded to high plastic strains under conditions of low constraint. The resulting predictions of the modified SB-FAD show significantly reduced conservatism compared to the unmodified SB-FAD.
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ASME 2013 Pressure Vessels and Piping Conference
July 14–18, 2013
Paris, France
Conference Sponsors:
- Pressure Vessels and Piping Division
- Nondestructive Evaluation Engineering Division
ISBN:
978-0-7918-5571-3
PROCEEDINGS PAPER
Failure Prediction of Curved Wide Plates Using the Strain-Based Failure Assessment Diagram With Correction for Constraint and Notch Radius Available to Purchase
Mikhail Trull,
Mikhail Trull
Tata Steel RD&T, Rotherham, UK
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Stijn Hertelé
Stijn Hertelé
Ghent University, Gent, Belgium
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Anthony J. Horn
AMEC, Warrington, UK
Mikhail Trull
Tata Steel RD&T, Rotherham, UK
Stijn Hertelé
Ghent University, Gent, Belgium
Paper No:
PVP2013-97562, V06BT06A030; 11 pages
Published Online:
January 17, 2014
Citation
Horn, AJ, Trull, M, & Hertelé, S. "Failure Prediction of Curved Wide Plates Using the Strain-Based Failure Assessment Diagram With Correction for Constraint and Notch Radius." Proceedings of the ASME 2013 Pressure Vessels and Piping Conference. Volume 6B: Materials and Fabrication. Paris, France. July 14–18, 2013. V06BT06A030. ASME. https://doi.org/10.1115/PVP2013-97562
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