The natural crack growth analysis (sometimes referred to as advanced finite element analysis (AFEA)) methodology has been developed by the US NRC and the nuclear industry to evaluate the natural crack growth due to primary water stress corrosion cracking (PWSCC) in nickel-based alloy materials. The natural crack growth (or AFEA) methodology allows the progression of a planar crack subjected to typical stress corrosion cracking (SCC)-type growth laws by calculating stress intensity factors at every nodal point along the crack front and incrementally advancing the crack front in a more natural manner. This paper describes the step-by-step procedure enhancements that have been made to the existing AFEA methodology. A significant enhancement was the feature to evaluate axial crack growth, where the crack was contained within the susceptible material. This methodology was validated by performing an AFEA evaluation for the axial crack that was found in the V.C. Summer hot-leg dissimilar metal weld (DMW). Other enhancements to the AFEA methodology include: feature to handle nonidealized circumferential through-wall cracks, mapping of weld residual stress for crack growth, and determination of limiting crack size using elastic-plastic J-integral analysis that included secondary stress (weld residual stress and thermal transient stress) effects.
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October 2012
Materials And Fabrication
Natural Crack Growth Analyses for Circumferential and Axial PWSCC Defects in Dissimilar Metal Welds
Do-Jun Shim,
e-mail: djshim@emc-sq.com
Do-Jun Shim
Engineering Mechanics Corporation of Columbus
, 3518 Riverside Drive, Suite 202, Columbus, OH 43221
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Sureshkumar Kalyanam,
Sureshkumar Kalyanam
Engineering Mechanics Corporation of Columbus
, 3518 Riverside Drive, Suite 202, Columbus, OH 43221
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Frederick Brust,
Frederick Brust
Engineering Mechanics Corporation of Columbus
, 3518 Riverside Drive, Suite 202, Columbus, OH 43221
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Gery Wilkowski,
Gery Wilkowski
Engineering Mechanics Corporation of Columbus
, 3518 Riverside Drive, Suite 202, Columbus, OH 43221
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Mike Smith,
Mike Smith
EdF Energy, Barnwood, Gloucester, GL4 3RS,
UK
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Andrew Goodfellow
Andrew Goodfellow
EdF Energy, Barnwood, Gloucester, GL4 3RS,
UK
Search for other works by this author on:
Do-Jun Shim
Engineering Mechanics Corporation of Columbus
, 3518 Riverside Drive, Suite 202, Columbus, OH 43221e-mail: djshim@emc-sq.com
Sureshkumar Kalyanam
Engineering Mechanics Corporation of Columbus
, 3518 Riverside Drive, Suite 202, Columbus, OH 43221
Frederick Brust
Engineering Mechanics Corporation of Columbus
, 3518 Riverside Drive, Suite 202, Columbus, OH 43221
Gery Wilkowski
Engineering Mechanics Corporation of Columbus
, 3518 Riverside Drive, Suite 202, Columbus, OH 43221
Mike Smith
EdF Energy, Barnwood, Gloucester, GL4 3RS,
UK
Andrew Goodfellow
EdF Energy, Barnwood, Gloucester, GL4 3RS,
UK
J. Pressure Vessel Technol. Oct 2012, 134(5): 051402 (10 pages)
Published Online: September 6, 2012
Article history
Received:
November 7, 2011
Revised:
May 10, 2012
Online:
September 6, 2012
Published:
September 6, 2012
Citation
Shim, D., Kalyanam, S., Brust, F., Wilkowski, G., Smith, M., and Goodfellow, A. (September 6, 2012). "Natural Crack Growth Analyses for Circumferential and Axial PWSCC Defects in Dissimilar Metal Welds." ASME. J. Pressure Vessel Technol. October 2012; 134(5): 051402. https://doi.org/10.1115/1.4007040
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