When multiple flaws are detected in structural components, remaining lives of the components are estimated by fatigue flaw growth calculations using combination rules in fitness-for-service codes. ASME, BS7910 and FITNET Codes provide different combination rules. Fatigue flaw growth for adjacent surface flaws in a pipe subjected to cyclic tensile stress were obtained by numerical calculations using these different combination rules. In addition, fatigue lives taking into account interaction effect between the two flaws were conducted by extended finite element method (X-FEM). As the calculation results, it is found that the fatigue lives calculated by the X-FEM are close to those by the ASME Code. Finally, it is worth noticing that the combination rule provided by the ASME Code is appropriate for fatigue flaw growth calculations.
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ASME 2016 Pressure Vessels and Piping Conference
July 17–21, 2016
Vancouver, British Columbia, Canada
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-5036-7
PROCEEDINGS PAPER
Fatigue Lives of Multiple Flaws in Accordance With Combination Rule
Kai Lu,
Kai Lu
Japan Atomic Energy Agency, Tokai-mura, Japan
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Yinsheng Li,
Yinsheng Li
Japan Atomic Energy Agency, Tokai-mura, Japan
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Kunio Hasegawa,
Kunio Hasegawa
Japan Atomic Energy Agency, Tokai-mura, Japan
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Valery Lacroix
Valery Lacroix
Tractebel Engineering, Brussels, Belgium
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Kai Lu
Japan Atomic Energy Agency, Tokai-mura, Japan
Yinsheng Li
Japan Atomic Energy Agency, Tokai-mura, Japan
Kunio Hasegawa
Japan Atomic Energy Agency, Tokai-mura, Japan
Valery Lacroix
Tractebel Engineering, Brussels, Belgium
Paper No:
PVP2016-63483, V01BT01A009; 7 pages
Published Online:
December 1, 2016
Citation
Lu, K, Li, Y, Hasegawa, K, & Lacroix, V. "Fatigue Lives of Multiple Flaws in Accordance With Combination Rule." Proceedings of the ASME 2016 Pressure Vessels and Piping Conference. Volume 1B: Codes and Standards. Vancouver, British Columbia, Canada. July 17–21, 2016. V01BT01A009. ASME. https://doi.org/10.1115/PVP2016-63483
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