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TECHNICAL PAPERS

Correlation of Test and FEA Results for the Nonlinear Behavior of Straight Pipes and Elbows

[+] Author and Article Information
Ying Tan, Vernon C. Matzen, Lixin Yu

Center for Nuclear Power Plant Structures, Equipment and Piping, North Carolina State University, Raleigh, NC 27695-7908

J. Pressure Vessel Technol 124(4), 465-475 (Nov 08, 2002) (11 pages) doi:10.1115/1.1493806 History: Received January 02, 2001; Revised May 20, 2002; Online November 08, 2002
Copyright © 2002 by ASME
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References

Greenstreet, W. L., 1978, “Experimental Study of Plastic Responses of Pipe Elbows,” ORNL/NUREG-24.
Mello, R. M., and Griffin, D. S., 1974, “Plastic Collapse Loads for Pipe Elbows Using Inelastic Analysis,” ASME J. Pressure Vessel Technol., pp. 177–183.
MARC-CDC, 1971, Nonlinear Finite Element Analysis Program, MARC Analysis Corporation and Control Data Corporation, Minneapolis, MN.
Sobel,  L. H., and Newman,  S. Z., 1980, “Comparison of Experimental and Simplified Analytical Results for the In-Plane Plastic Bending and Buckling of an Elbow,” ASME J. Pressure Vessel Technol., 102, pp. 400–409.
MARC-CDC, Version H.3. 1977.
Sobel,  L. H., and Newman,  S. Z., 1986, “Simplified, Detailed, and Isochronous Analysis and Test Results for the In-Plane Elastic-Plastic and Creep Behavior of an Elbow,” ASME J. Pressure Vessel Technol., 108, pp. 297–304.
MARC-CDC, Version H.4. 1979.
Dhalla,  A. K., 1987, “Collapse Characteristics of a Thin-Walled Elbow: Validation of an Analytical Procedure,” ASME J. Pressure Vessel Technol., 109, pp. 394–401.
MARC-CDC, 1979.
Suzuki,  N., and Nasu,  M., 1989, “Non-Linear Analysis of Welded Elbows Subjected to In-Plane Bending,” Comput. Struct., 32, No. 3/4, pp. 871–881.
ADINA/v5, ADINA R&D, Inc., 71 Elton Avenue, Watertown, MA 02472, USA.
Kussmaul, K., Diem, H. K., Uhlmann, D., and Kobes, E., 1995, “Pipe bend behavior at load levels beyond design,” Trans. 13th Int. Conf. Structural Mechanics and Reactor Technology, SMiRT 13, Brazil.
ABAQUS, 1989, User’s Manual, Version 4.8, Hibbitt, Karlsson and Sorensen, Inc.
SAN, 1980, Frderungsvorhaben BMI SR 79, SDK-Report No. 3304 SR 79-01, June.
Ju, G., 1991 “Bifurcation and Localization Instabilities in Plastic Bending of Cylindrical Shells,” Ph.D. dissertation, University of Texas at Austin.
Hassan, T., Bari, S., and Matzen, V. C., 1997-98, “Monotonic Tests on 2 inch, Schedule 40 Elbows,” data developed at the Center for Nuclear Power Plant Structures, Equipment and Piping, North Carolina State University.
ANSYS v5.4, 1994, ANSYS, Inc.
ANSYS v5.4, 1997, Help Manual, 4.181, SHELL181.
ANSYS v5.4, 1997, Help Manual, 4.43, SHELL43.
ABAQUS v6.1, Web-based Help Manual, 15.5.1-1.
Yu, L., 1998. “Elbow Stress Indices Using Finite Element Analysis,” Ph.D. dissertation, North Carolina State University, Raleigh, NC.
ANSYS v5.4, 1997, Help Manual, 4.60, PIPE60.
Tan, Y., and Matzen, V. C., 2001. “Correlation of In-Plane Bending Test and FEA Results for Thin-Walled Elbows,” to be published in Nucl. Eng. Des..
Tan, Y., Wilkins, K., and Matzen, V. C., 2001. “Correlation of Test and FEA Results for Elbows Subjected to Out-of-Plane Loading,” to be published in Nucl. Eng. Des..
Béranger, G., Henry, G., and Sanz, G., eds., 1996. The Book of Steel, preface by P. Lacombe, trans. from French by J. H. Davidson, Andover: Intercept, p. 219.

Figures

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Quarter-FEA model for test no. 11 (Do/t=19.5); same boundary conditions as Fig. 6(b)
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FEA correlation with data from Ju—(a) straight pipe, test no. 6 (Do/t=35.7), (b) straight pipe, test no. 11 (Do/t=19.5)
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In-plane closing/opening mode test—(a) test setup, (b) specimen configuration
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Measured dimensions of test specimens
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Measured cross-sections
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Measured and constructed stress-strain curves
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In-Plane Bending—(a) FEA model (elevation view), (b) FEA model (oblique view), (c) boundary conditions
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FEA and test correlation for in-plane bending mode—(a) closing mode, (b) opening mode
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Correlation using PIPE60 element—(a) closing mode, (b) opening mode
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Simplified geometric model—(a) closing mode, (b) opening mode
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Measured geometric model—(a) closing mode, (b) opening mode
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Measurement of intrados wall thickness
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ABAQUS ELBOW31 element model
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Mello and Griffin test—(a) test arrangement, (b) load displacement curves
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Sobel and Newman 1980 test—(a) test arrangement, (b) moment-rotation
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Sobel and Newman 1986 test—(a) test arrangement, (b) moment-rotation
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Dhalla moment-rotation curves
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Suzuki and Nasu tests—(a) 24-in. test specimen test setup, (b) 12-in. specimen load displacement curves, (c) 24-in. specimen load displacement curves
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Ju test no. 6 (Do/t=35.7)—(a) quarter-FEA model, (b) boundary conditions (X-Y and Y-Z are planes of symmetry)
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Correlation using ABAQUS ELBOW31 element—(a) closing mode, (b) opening mode
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Load-displacement curves for the closing mode—(a) opening mode, (b) closing mode

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