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TECHNICAL PAPERS

Elastic Stresses in Elbows Submitted to In-Plane Bending Moment

[+] Author and Article Information
S. Marie

CEA/DEN/DM2S/SEMT/LISN, Centre d’études de Saclay, 91191 Gif sur Yvette Cedex, France

M. Nédélec

IRSN/DES/SAMS, 92265 Fontenay-aux-Roses Cedex, France

J. Pressure Vessel Technol 125(2), 209-220 (May 05, 2003) (12 pages) doi:10.1115/1.1533800 History: Received February 07, 2001; Revised October 21, 2002; Online May 05, 2003
Copyright © 2003 by ASME
Topics: Stress , Junctions
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References

Figures

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Effect of elbow angle on circumferential membrane stress index σ2m/(M/Z) in the straight pipe-elbow junction for different λ and rm/t ratio
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Effect of elbow angle on circumferential bending stress index σ2b/(M/Z) in the straight pipe-elbow junction for different λ and rm/t ratio
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Illustration of the accuracy of the proposed equations: FE maximum stress versus maximum stress from fitted relations
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Estimation of stresses in the median section for intermediate elbow angles αc for a moment of 107 N⋅mm(rm/t=10 and λ=0.35): (a) αc=120 deg; (b) αc=60 deg; (c) αc=30 deg
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Estimation of stresses in the straight pipe-elbow junction for intermediate elbow angles αc for a moment of 107 N⋅mm(rm/t=10 and λ=0.35): (a) αc=120 deg; (b) αc=60 deg; (c) αc=30 deg
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Comparison between fitted equations and stress indice proposed in ASME Section III code Case N-319 4
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Stresses in the median section for an in-plane opening bending moment of 107 N⋅mm(rm=300 mm,rm/t=5 and λ=0.363)
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Comparison between RCC-MR 6 and Gross 7 relationships for estimating circumferential membrane stress σ2m(rm=300 mm,rm/t=5, and λ=0.363) for a moment of 107 N⋅mm
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Ovalization of an elbow submitted to an in-plane opening bending moment of 107 N⋅mm(αc=90 deg,rm=300 mm,rm/t=5, and λ=0.363)
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Variation of curvature (dα/ds) in the elbow (αc=90 deg,rm=300 mm,rm/t=5, and λ=0.363) for a moment of 107 N⋅mm
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Section nomenclature for boundary conditions definition used in F.E. calculations
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Kinematic relation on the upper section of the straight pipe used in the FE calculations
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Effect of elbow angle on longitudinal membrane stress index σ1m/(M/Z) in the median section for different λ and rm/t ratio
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Effect of elbow angle on longitudinal bending stress index σ1b/(M/Z) in the median section for different λ and rm/t ratio
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Effect of elbow angle on circumferential membrane stress index σ2m/(M/Z) in the median section for different λ and rm/t ratio
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Effect of elbow angle on circumferential bending stress index σ2b/(M/Z) in the median section for different λ and rm/t ratio
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Effect of elbow angle on longitudinal membrane stress index σ1m/(M/Z) in the straight pipe-elbow junction for different λ and rm/t ratio
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Effect of elbow angle on longitudinal bending stress index σ1b/(M/Z) in the straight pipe-elbow junction for different λ and rm/t ratio

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