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 simulated as a two-dimensional problem and is solved via the finite element method. 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 lengths, emanating from the tip of erosions of different geometries, 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 and erosion span angle, α, from 6 deg to 360 deg. The effective SIF for relatively short cracks is found to be increased by the presence of the erosion, which in turn may result in a significant decrease in the vessel’s fatigue life of up to an order of magnitude. Deep cracks are found to be almost unaffected by the erosion.
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August 2001
Technical Papers
The Influence of Multiple Axial Erosions on the Fatigue Life of Autofrettaged Pressurized Cylinders
M. Perl, Mem. ASME, Professor and Dean, Faculty of Engineering Sciences,,
M. Perl, Mem. ASME, Professor and Dean, Faculty of Engineering Sciences,
Pearlstone Center for Aeronautical Engineering Studies, Ben Gurion University of the Negev, Beer Sheva 84105, Israel
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C. Levy, Mem. ASME, Professor,,
C. Levy, Mem. ASME, Professor,
Department of Civil Engineering, Academic College of Judea and Samaria, Ariel 44837, Israel
on leave from Department of Mechanical Engineering, Florida International University, Miami, FL 33199
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Q. Ma
Q. Ma
Mechanical Engineering Department, Carnegie-Mellon University, Pittsburgh, PA 15213
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M. Perl, Mem. ASME, Professor and Dean, Faculty of Engineering Sciences,
Pearlstone Center for Aeronautical Engineering Studies, Ben Gurion University of the Negev, Beer Sheva 84105, Israel
C. Levy, Mem. ASME, Professor,
Department of Civil Engineering, Academic College of Judea and Samaria, Ariel 44837, Israel
on leave from Department of Mechanical Engineering, Florida International University, Miami, FL 33199
Q. Ma
Mechanical Engineering Department, Carnegie-Mellon University, Pittsburgh, PA 15213
Contributed by the Pressure Vessels and Piping Division and presented at the Pressure Vessels and Piping Conference (Joint w/ICPVT), Boston, Massachusetts, August 1–5, 1999, of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS. Manuscript received by the PVP Division, April 17, 2000; revised manuscript received February 5, 2001. Editor: S. Y. Zamrik.
J. Pressure Vessel Technol. Aug 2001, 123(3): 293-297 (5 pages)
Published Online: February 5, 2001
Article history
Received:
April 17, 2000
Revised:
February 5, 2001
Citation
Perl, M., Levy, C., and Ma, Q. (February 5, 2001). "The Influence of Multiple Axial Erosions on the Fatigue Life of Autofrettaged Pressurized Cylinders ." ASME. J. Pressure Vessel Technol. August 2001; 123(3): 293–297. https://doi.org/10.1115/1.1372325
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