The paper investigates the current rules for fatigue analysis on plastic basis of the ASME Boiler and Pressure Vessel Code. It addresses the question: When these rules are used for a vessel or component, is it designed with respect to crack initiation or failure? Using available fatigue test data, the question is answered for blunt double-notch plate specimens made of AISI 4340 steel. When the rules are applied to these specimens, it is found that they are designed with respect to the initiation of a crack of a certain length that decreases as the strain range increases. The plate specimens are not designed with respect to failure. It is concluded that for geometries that exhibit a strain range gradient away from the surface, the number of cycles allowed by the current rules includes the initiation phase but not the propagation phase of a fatigue crack. If this result is unsatisfactory, new rules have to be written.
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ASME 2003 Pressure Vessels and Piping Conference
July 20–24, 2003
Cleveland, Ohio, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
0-7918-1694-X
PROCEEDINGS PAPER
Design Criterion of Fatigue Analysis on Plastic Basis by ASME B&PV Code
Arturs Kalnins,
Arturs Kalnins
Lehigh University, Bethlehem, PA
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Norman E. Dowling
Norman E. Dowling
Virginia Polytechnic Institute and State University, Blackburg, VA
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Arturs Kalnins
Lehigh University, Bethlehem, PA
Norman E. Dowling
Virginia Polytechnic Institute and State University, Blackburg, VA
Paper No:
PVP2003-1766, pp. 11-18; 8 pages
Published Online:
August 13, 2008
Citation
Kalnins, A, & Dowling, NE. "Design Criterion of Fatigue Analysis on Plastic Basis by ASME B&PV Code." Proceedings of the ASME 2003 Pressure Vessels and Piping Conference. Pressure Vessel and Piping Codes and Standards. Cleveland, Ohio, USA. July 20–24, 2003. pp. 11-18. ASME. https://doi.org/10.1115/PVP2003-1766
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Subsection NB—Class 1 Components
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