Defects are commonly in weld joints depending on the process condition and workmanship of the welding process. Under good control environment, the amount and size of the defects can be very small and do not compromise the integrity of the weld joints. In other cases, the amount and size of the defects in the weld joints can be large and, therefore, can limit the integrity of the structure. Determination of critical flaw sizes of the welds requires accurate calculation of stress intensity factors of cracks of various lengths at different locations for their use in crack growth evaluation under cyclic loading. Two commonly used welded joints, namely butt and corner weld joints, were investigated. Three crack configurations for each of the two welded joints were considered. Finite element method was used in conjunction of the M-integral to obtain the stress intensity factors for various lengths of the cracks. Results were then used to perform the fitness-for-purpose assessment of these welds under spectral loading. Methodology and results of the stress intensity factor calculation for the above-mentioned cracks are covered in this paper.
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ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference
July 23–27, 2006
Vancouver, BC, Canada
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
0-7918-4755-1
PROCEEDINGS PAPER
Stress Intensity Factors for Defects in Two Common Weld Joints
Shigeru Itoh
Shigeru Itoh
Kumamoto University, Kumamoto City, Kumamoto, Japan
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Wing Cheng
MechComp, Inc., Sunnyvale, CA
Shigeru Itoh
Kumamoto University, Kumamoto City, Kumamoto, Japan
Paper No:
PVP2006-ICPVT-11-93348, pp. 201-210; 10 pages
Published Online:
July 23, 2008
Citation
Cheng, W, & Itoh, S. "Stress Intensity Factors for Defects in Two Common Weld Joints." Proceedings of the ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. Volume 4: Fluid Structure Interaction, Parts A and B. Vancouver, BC, Canada. July 23–27, 2006. pp. 201-210. ASME. https://doi.org/10.1115/PVP2006-ICPVT-11-93348
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