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RESEARCH PAPERS

The Combined Effect of Pressure and Autofrettage on Uniform Arrays of Three-Dimensional Unequal-Depth Cracks in Gun Barrels

[+] Author and Article Information
M. Perl

Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576

B. Ostraich

Pearlstone Center for Aeronautical Engineering Studies, Department of Mechanical Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel

J. Pressure Vessel Technol 127(4), 464-470 (Oct 31, 2005) (7 pages) doi:10.1115/1.1806445 History: Received May 04, 2004; Revised June 15, 2004; Online October 31, 2005
Copyright © 2005 by ASME
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References

Figures

Grahic Jump Location
KNmax/K0 as a function of the varying crack depth for arrays of n1+n2=64 cracks, with ellipticities of a1/c1=0.7, 1.0, and 1.5 (a1/t=0.15, ψ=1.93)
Grahic Jump Location
The relative size of the “interaction range” as a function of the number of cracks in the array, the fixed crack length, and ellipticity
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The relative size of the “interaction range” as a function of the inter-crack aspect-ratio
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Schematic of the multicracked cylinder
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The multicracked cylinder: (a) segment containing two unequal cracks: a1 and a2 are the crack depths of the fixed and varying crack subarrays, respectively; and (b) parametric angle φ defining the points on the crack front
Grahic Jump Location
KNmax/K0 versus a2/t for an array of n1+n2=32 cracks (a1/t=0.15,a1/c1=a2/c2=1.0, ψ=1.93): Curve A—KNmax/K0 for the fixed crack, in the presence of the varying crack; Curve B—KNmax/K0 for the varying crack, in the presence of the fixed crack; Curve C—KNmax/K0 for the fixed crack, in the absence of the varying crack; Curve D—KNmax/K0 for the varying crack, in the absence of the fixed crack
Grahic Jump Location
KNmax/K0 as a function of the varying crack depth for arrays of n1+n2=32, 64, 128 cracks (a1/t=0.1,a1/c1=a2/c2=1.0, ψ=1.93)
Grahic Jump Location
KNmax/K0 as a function of the varying crack depth for arrays of n1+n2=32 cracks, with fixed crack depths of a1/t=0.1, 0.15, and 0.2 (a1/c1=a2/c2=0.7, ψ=1.93)

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