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Comparison of Experiment and Calculation on Fatigue Crack Growth for Transformed Surface Flaw

[+] Author Affiliations
Kunio Hasegawa, Yinsheng Li

Japan Nuclear Energy Safety Organization, Tokyo, Japan

Katsumasa Miyazaki

Hitachi Research Laboratory, Hitachi, Ibaraki, Japan

Koichi Saito

Hitachi-GE Nuclear Energy, Ltd., Hitachi, Ibaraki, Japan

Paper No. PVP2012-78688, pp. 369-372; 4 pages
doi:10.1115/PVP2012-78688
From:
  • ASME 2012 Pressure Vessels and Piping Conference
  • Volume 1: Codes and Standards
  • Toronto, Ontario, Canada, July 15–19, 2012
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5500-3
  • Copyright © 2012 by ASME

abstract

If a subsurface flaw is located near a component surface, the subsurface flaw is transformed to a surface flaw in accordance with a flaw-to-surface proximity rule. The re-characterization process from subsurface to surface flaw is adopted in all fitness-for-service (FFS) codes. However, the criteria of the re-characterizations are different among the FFS codes. Cyclic tensile experiment was conducted on a carbon steel flat plate with a subsurface flaw at ambient temperature. The objective of this paper is to compare the experiment and calculation of fatigue crack growth behavior for a subsurface flaw and the transformed surface flaw, and to confirm the flaw-to-surface proximity rule defined by ASME Code Section XI and JSME S NA1 Code.

Copyright © 2012 by ASME
Topics: Fatigue cracks

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