Erosion geometry effects on the mode I stress intensity factor (SIF) for a crack emanating from an erosion’s deepest point in a multiply eroded, autofrettaged, pressurized, thick-walled cylinder are investigated. The problem is solved via the finite element method (FEM). Autofrettage, based on von Mises yield criterion, is simulated by thermal loading and SIFs are determined by the nodal displacement method. SIFs are evaluated for a variety of relative crack depths, and crack ellipticities, emanating from the tip of erosions of different geometry, namely: (a) semi-circular erosions of relative depths of 1–10 percent of the cylinder’s wall thickness, t; (b) arc erosions for several dimensionless radii of curvature, and (c) semi-elliptical erosions with ellipticities of The erosion separation angle, α, is taken from 7 to 360 deg. Deep cracks are found to be almost unaffected by the erosion. The effective SIF for relatively short cracks is enhanced by the presence, separation distance and geometry of the erosion, as well as the crack geometry, and may result in a significant decrease in the vessel’s fatigue life of up to an order of magnitude.
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February 2002
Technical Papers
The Influence of Multiple Axial Erosions on a Three-Dimensional Crack in Determining the Fatigue Life of Autofrettaged Pressurized Cylinders
C. Levy, Professor, Mem. ASME,
C. Levy, Professor, Mem. ASME
Department of Civil Engineering, Academic College of Judea and Samaria, Ariel 44837, Israel
on leave from the Department of Mechanical Engineering, Florida International University, Miami, FL 33199
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M. Perl, Mem. ASME, Professor and Dean,
M. Perl, Mem. ASME, Professor and Dean
Faculty of Engineering Sciences, Ben Gurion University of the Negev, Beer Sheva, 84105, Israel
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Q. Ma, Mem. ASME
Q. Ma, Mem. ASME
Mechanical Engineering Department, Carnegie-Mellon University, Pittsburgh, PA
former Graduate Student, Department of Mechanical Engineering, Florida International University, Miami, FL 33199
Search for other works by this author on:
C. Levy, Professor, Mem. ASME
Department of Civil Engineering, Academic College of Judea and Samaria, Ariel 44837, Israel
on leave from the Department of Mechanical Engineering, Florida International University, Miami, FL 33199
M. Perl, Mem. ASME, Professor and Dean
Faculty of Engineering Sciences, Ben Gurion University of the Negev, Beer Sheva, 84105, Israel
Q. Ma, Mem. ASME
Mechanical Engineering Department, Carnegie-Mellon University, Pittsburgh, PA
former Graduate Student, Department of Mechanical Engineering, Florida International University, Miami, FL 33199
Contributed by the Pressure Vessels and Piping Division and presented at the Pressure Vessels and Piping Conference, Seattle, Washington, July 23–27, 2000, of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS. Manuscript received by the PVP Division, October 17, 2000; revised manuscript received May 22, 2001. Associate Editor: D. M. Fryer.
J. Pressure Vessel Technol. Feb 2002, 124(1): 1-6 (6 pages)
Published Online: May 22, 2001
Article history
Received:
October 17, 2000
Revised:
May 22, 2001
Citation
Levy, C., Perl, M., and Ma, Q. (May 22, 2001). "The Influence of Multiple Axial Erosions on a Three-Dimensional Crack in Determining the Fatigue Life of Autofrettaged Pressurized Cylinders ." ASME. J. Pressure Vessel Technol. February 2002; 124(1): 1–6. https://doi.org/10.1115/1.1386656
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