Erosion geometry effects on the mode I stress intensity factor (SIF) for a crack emanating from the farthest erosion’s deepest point in a multiply, finite-length or full-length eroded, partially autofrettaged, pressurized, thick-walled cylinder is investigated. The problem is solved via the FEM method. Autofrettage, based on von Mises’ yield criterion, is simulated by thermal loading and SIFs are determined by the nodal displacement method. SIFs were evaluated for a variety of relative crack depths, and crack ellipticities, emanating from the tip of the erosion of various geometries, namely, (a) semi-circular erosions of relative depths of 1–10% of the cylinder’s wall thickness, t; (b) arc erosions for several dimensionless radii of curvature, and (c) semi-elliptical erosions with ellipticities of In the cases of finite erosions, the semi-erosion length to the semi-crack length, was between two and ten, erosion angular spacing, α, was between 7 and 120 degrees, whereas percent autofrettage investigated included 30%, 60%, and 100%. The normalized SIFs and the normalized effective SIFs of a crack emanating from the farthest finite erosion are found to rise sharply for values of Both the normalized SIF and normalized effective SIF values are mitigated as the amount of partial autofrettage increases with the most rapid decrease occurring between 0–60% autofrettage. The purpose of this study is to detail these findings.
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November 2003
Technical Papers
The Influence of Finite Three-Dimensional Multiple Axial Erosions on the Fatigue Life of Partially Autofrettaged Pressurized Cylinders
C. Levy, Professor, Mem. ASME,
C. Levy, Professor, Mem. ASME
Center for Engineering and Applied Science, Department of Mechanical Engineering, Florida International University, Miami, FL 33199
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M. Perl, Professor, Mem. ASME,
M. Perl, Professor, Mem. ASME
Mechanical Engineering Department and Dean of Engineering Sciences, Pearlstone Center for Aeronautical Engineering Studies, 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 15213
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C. Levy, Professor, Mem. ASME
Center for Engineering and Applied Science, Department of Mechanical Engineering, Florida International University, Miami, FL 33199
M. Perl, Professor, Mem. ASME
Mechanical Engineering Department and Dean of Engineering Sciences, Pearlstone Center for Aeronautical Engineering Studies, Ben Gurion University of the Negev, Beer Sheva 84105, Israel
Q. Ma, Mem. ASME
Mechanical Engineering Department, Carnegie-Mellon University, Pittsburgh, PA 15213
Contributed by the Pressure Vessels and Piping Division for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received by the PVP Division April 20, 2003; revision received June 2, 2003. Associate Editor: S. Y. Zamrik.
J. Pressure Vessel Technol. Nov 2003, 125(4): 379-384 (6 pages)
Published Online: November 4, 2003
Article history
Received:
April 20, 2003
Revised:
June 2, 2003
Online:
November 4, 2003
Citation
Levy, C., Perl, M., and Ma, Q. (November 4, 2003). " The Influence of Finite Three-Dimensional Multiple Axial Erosions on the Fatigue Life of Partially Autofrettaged Pressurized Cylinders ." ASME. J. Pressure Vessel Technol. November 2003; 125(4): 379–384. https://doi.org/10.1115/1.1616582
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