The stress intensity factor estimated by the appropriate modeling of components is essential for the evaluation of crack growth behavior in stress corrosion cracking. For the appropriate modeling of a welded component with a crack, it is important to understand the effects of residual stress distribution and the geometry of the component on the stress intensity factor of the surface crack. In this study, the stress intensity factors of surface cracks under two assumed residual stress fields were calculated. As residual stress field, a bending type stress field (tension-compression) and a self-equilibrating stress field (tension-compression-tension) through the thickness were assumed, respectively. The geometries of the components were plate and piping. The assumed surface cracks for those evaluations were a long crack in the surface direction and a semi-elliptical surface crack. In addition, crack growth evaluations were conducted to clarify the effects of residual stress distribution and the geometry of the component. Here, the crack growth evaluation means simulating increments of crack depth and length using crack growth properties and stress intensity factors. The effects of residual stress distribution and component geometry on the stress intensity factor of surface cracks and the appropriate modeling of cracked components are discussed by comparing the stress intensity factors and the crack growth evaluations for surface cracks under residual stress fields.
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February 2011
Research Papers
The Effects of Residual Stress Distribution and Component Geometry on the Stress Intensity Factor of Surface Cracks
Katsumasa Miyazaki,
Katsumasa Miyazaki
Materials Research Laboratory,
Hitachi, Ltd.
, Hitachi, Ibaraki 317-8511, Japan
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Masahito Mochizuki
Masahito Mochizuki
Department of Manufacturing Science, Graduate School of Engineering,
Osaka University
, Suita, Osaka 565-0871, Japan
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Katsumasa Miyazaki
Materials Research Laboratory,
Hitachi, Ltd.
, Hitachi, Ibaraki 317-8511, Japan
Masahito Mochizuki
Department of Manufacturing Science, Graduate School of Engineering,
Osaka University
, Suita, Osaka 565-0871, JapanJ. Pressure Vessel Technol. Feb 2011, 133(1): 011701 (7 pages)
Published Online: January 20, 2011
Article history
Received:
April 16, 2007
Revised:
May 24, 2009
Online:
January 20, 2011
Published:
January 20, 2011
Citation
Miyazaki, K., and Mochizuki, M. (January 20, 2011). "The Effects of Residual Stress Distribution and Component Geometry on the Stress Intensity Factor of Surface Cracks." ASME. J. Pressure Vessel Technol. February 2011; 133(1): 011701. https://doi.org/10.1115/1.4002671
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