Three-dimensional finite element models were formulated to evaluate the distribution of the elastic stress intensity factor around the periphery of cracklike flaws postulated to exist at the corners of nozzles intersecting cylindrical shells. The effect of the assumed shape of the nozzle corner flaw on the distribution of the stress intensity factor along the crack front was determined in order to indicate where initiation of crack growth is most likely to occur and what shape the crack is most likely to take subsequent to stable crack growth. This is important because of the uncertainty associated with the flaw shape and its effect on crack growth in the nozzle corner region. Stress intensity factors computed from the nozzle corner flaw models were also compared with solutions evaluated using 1) a simplified procedure similar to that given in Section XI of the ASME Boiler and Pressure Vessel Code that makes use of the stresses calculated in the absence of the flaw, 2) the method recommended specifically for nozzle corner flaws in Section III of the ASME Code, and 3) a previously published empirical formula. The results of this paper confirm the adequacy of the simplified procedure for the analysis of nozzle corner flaws of different shapes.
Skip Nav Destination
Article navigation
February 1988
Research Papers
The Effect of Flaw Shape on the Fracture Propensity of Nozzle Corner Flaws
E. Friedman,
E. Friedman
Westinghouse Electric Corporation, West Mifflin, Pa. 15122
Search for other works by this author on:
D. P. Jones
D. P. Jones
Westinghouse Electric Corporation, West Mifflin, Pa. 15122
Search for other works by this author on:
E. Friedman
Westinghouse Electric Corporation, West Mifflin, Pa. 15122
D. P. Jones
Westinghouse Electric Corporation, West Mifflin, Pa. 15122
J. Pressure Vessel Technol. Feb 1988, 110(1): 59-63 (5 pages)
Published Online: February 1, 1988
Article history
Received:
October 29, 1987
Online:
November 5, 2009
Citation
Friedman, E., and Jones, D. P. (February 1, 1988). "The Effect of Flaw Shape on the Fracture Propensity of Nozzle Corner Flaws." ASME. J. Pressure Vessel Technol. February 1988; 110(1): 59–63. https://doi.org/10.1115/1.3265568
Download citation file:
Get Email Alerts
Cited By
Investigations of In-Plane Fluidelastic Instability in a Multispan U-Bend Tube Array—Part II: Tests in Two-Phase Flow
J. Pressure Vessel Technol (April 2023)
Investigations of In-Plane Fluidelastic Instability in a Multispan U-Bend Tube Array—Part I: Tests in Air Flow
J. Pressure Vessel Technol (April 2023)
Research on the Buckling Load of Clamped Spherical Caps Under External Pressure: Analyzed by the Fourier Series Model With Initial Geometric Imperfections
J. Pressure Vessel Technol (April 2023)
Identification of Crack Shapes by Digital Image Correlation Using JE-MAP Method
J. Pressure Vessel Technol
Related Articles
Influence of Flaw Shapes on Stress Intensity Factors for Pressure Vessel Surface Flaws and Nozzle Corner Cracks
J. Pressure Vessel Technol (August,1980)
Experimental Stress Analysis for Four 24-in. ANSI Standard B16.9 Tees
J. Pressure Vessel Technol (November,1977)
ASME Boiler and Pressure Vessel Code Roadmap for Compact Heat Exchangers in High Temperature Reactors
ASME J of Nuclear Rad Sci (October,2020)
Finite Element Analysis of Perforated Plates Containing Triangular Penetration Patterns of 5 and 10 Percent Ligament Efficiency
J. Pressure Vessel Technol (August,1975)
Related Proceedings Papers
Related Chapters
Openings
Guidebook for the Design of ASME Section VIII Pressure Vessels
Part 2, Section II—Materials and Specifications
Companion Guide to the ASME Boiler and Pressure Vessel Code, Volume 1, Third Edition
Part 2, Section II—Materials and Specifications
Companion Guide to the ASME Boiler & Pressure Vessel Code, Volume 1, Second Edition