Low cycle fatigue tests were conducted using sound elbows made of carbon steel (STPT410). The elbows were subjected to cyclic in-plane bending under displacement control with internal pressure of 9 MPa. The preliminary fatigue tests were conducted under constant cyclic displacements. Then, two test conditions were adopted to investigate the influence of cyclic pre-overload on low cycle behavior of elbow on the basis of the preliminary test results. The fatigue test results were evaluated by using the total usage factor UFTotal (= UFpre+UFpost), where the UFpre and UFpost correspond to usage factor for δpre and δpost, respectively. The fatigue lives of overloaded elbow pipes were estimated based on the cumulative fatigue damage rule basically from UFpre = 0.2 to UFpre = 0.6. In addition, three-dimensional elastic-plastic analyses were carried out using the finite element method. The crack penetration area and the crack growth direction were successfully predicted by the analyses.
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ASME 2011 Pressure Vessels and Piping Conference
July 17–21, 2011
Baltimore, Maryland, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-4456-4
PROCEEDINGS PAPER
Influences of Cyclic Pre-Overload on Low Cycle Fatigue Behaviours of Elbow Pipe Available to Purchase
Kazuya Matsuo,
Kazuya Matsuo
Yokohama National University, Yokohama, Kanagawa, Japan
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Koji Takahashi,
Koji Takahashi
Yokohama National University, Yokohama, Kanagawa, Japan
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Kyohei Sato
Kyohei Sato
Yokohama National University, Yokohama, Kanagawa, Japan
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Kazuya Matsuo
Yokohama National University, Yokohama, Kanagawa, Japan
Koji Takahashi
Yokohama National University, Yokohama, Kanagawa, Japan
Kyohei Sato
Yokohama National University, Yokohama, Kanagawa, Japan
Paper No:
PVP2011-57581, pp. 1213-1219; 7 pages
Published Online:
May 21, 2012
Citation
Matsuo, K, Takahashi, K, & Sato, K. "Influences of Cyclic Pre-Overload on Low Cycle Fatigue Behaviours of Elbow Pipe." Proceedings of the ASME 2011 Pressure Vessels and Piping Conference. Volume 6: Materials and Fabrication, Parts A and B. Baltimore, Maryland, USA. July 17–21, 2011. pp. 1213-1219. ASME. https://doi.org/10.1115/PVP2011-57581
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