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TECHNICAL PAPERS

The Influence of Finite Three-Dimensional Multiple Axial Erosions on the Fatigue Life of Partially Autofrettaged Pressurized Cylinders

[+] Author and Article Information
C. Levy

Center for Engineering and Applied Science, Department of Mechanical Engineering, Florida International University, Miami, FL 33199

M. Perl

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

Mechanical Engineering Department, Carnegie-Mellon University, Pittsburgh, PA 15213

J. Pressure Vessel Technol 125(4), 379-384 (Nov 04, 2003) (6 pages) doi:10.1115/1.1616582 History: Received April 20, 2003; Revised June 02, 2003; Online November 04, 2003
Copyright © 2003 by ASME
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References

Figures

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(a) A half cylinder with three finite erosions and one crack. X-Y plane of symmetry is Z=0; and (b) cylinder front view showing finite erosions and crack.
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(a) The submodel used; (b) definition of the angle ϕ; and (c) crack geometry-the crack wedge angle γ is 4 deg.
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(a) Normalized SIFs versus ϕ for a crack emanating from the farthest of three equidistant erosions: 100% Autofrettage, d/t=0.05,d/h=1,a/c=0.5,a/t=0.05,α=12 deg; (b) Normalized effective SIFs versus ϕ for a crack emanating from the farthest of 3 equidistant erosions; 30% autofrettage, d/t=0.05,d/h=1,a/c=0.5,a/t=0.05, α=12 deg; and (c) Normalized effective SIFs versus ϕ for a crack emanating from the farthest of 3 equidistant erosions; 60% autofrettage, d/t=0.05,d/h=1,a/c=1.5,a/t=0.05, α=12 deg.
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(a) Maximum normalized effective SIFs versus Le/c for a crack emanating from the farthest of three equidistant erosions: 30% autofrettage, d/t=0.05,d/h=1,a/t=0.05, α=12 deg; and (b) 60% autofrettage, d/t=0.05,d/h=1,a/t=0.05, α=12 deg.
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(a) Maximum normalized SIFs versus Le/c for a crack emanating from the farthest of three equidistant erosions; 100% autofrettage, d/t=0.05,a/c=1,a/t=0.05, α=12 deg; (b) Maximum normalized effective SIFs versus Le/c for a crack emanating from the farthest of three equidistant erosions; 30% autofrettage, d/t=0.05,a/c=1,a/t=0.05, α=12 deg; and (c) Maximum normalized effective SIFs versus Le/c for a crack emanating from the farthest of three equidistant erosions; 60% autofrettage, d/t=0.05,a/c=1,a/t=0.05, α=12 deg.
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Maximum normalized effective SIFs versus α for a crack emanating from the farthest of three equidistant erosions: 30% autofrettage, d/t=0.05,d/h=1,a/t=0.15,Le/c=4.
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Maximums of Normalized Effective SIFs versus crack depth for a crack emanating from the farthest of three equidistant erosions: 30% autofrettage, d/t=0.05,d/h=1,a/t=0.15,Le/c=4,α=7°.

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