Defining the Plastic Limit Moment for Shell Intersections Based on a New Criterion
Publication: Journal of Engineering Mechanics
Volume 140, Issue 8
Abstract
In this research, a new method and numerical procedure for determining the plastic limit load in shell intersections using elastic-plastic finite-element analysis are presented. The proposed method is based on the maximum criterion of the rate of the change of the relative plastic work. For experimental models of cylindrical vessels with radial nozzles under in-plane moment, the results of comparisons with the twice elastic slope method were considered for determining the plastic limit moment. A parametric study of the nonradial cylindrical shell intersections subjected to in-plane moment on the nozzle was performed to examine the influence of an angular parameter on the plastic limit moment on the basis of the proposed criterion.
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Acknowledgments
This study was supported by the Ministry of Education and Science of the Russian Federation.
References
ANSYS 10.0 [Computer software]. Canonsburg, PA, ANSYS.
ASME. (2004). Boiler and pressure vessel code, New York.
British Standards Institution. (2006). “Specification for unfired fusion welded pressure vessels.” PD 5500, London.
Camilleri, D., Mackenzie, D., and Hamilton, R. (2006). “Evaluating plastic loads in torispherical heads using a new criterion of collapse.” Proc., 2006 ASME Pressure Vessels and Piping Division Conf., Vol. 3, ASME, New York, 701–708.
Ellyin, F. (1977). “An experimental study of elastic-plastic response of branch pipe tee connection subjected to internal pressure, external couples and combined loadings.” WRC Bulletin 230, Welding Research Council, New York.
European Committee for Standardization. (2002). “Unfired pressure vessels, part 3.” EN 13445-3, Brussels, Belgium.
Gerdeen, J. C. (1979). “A critical evaluation of plastic behavior data and a unified definition of plastic loads for pressure components.” WRC Bulletin 254, Welding Research Council, New York.
Gwaltney, R. C., Corum, J. M., Bolt, S. E., and Bryson, J. W. (1976). “Experimental stress analysis of cylinder-to-cylinder shell models and comparisons with theoretical predictions.” J. Pressure Vessel Technol., 98(4), 283–290.
Ilyushin, A. A. (1948). Plasticity, Gostekhidzat, Moscow.
Kirkwood, M. G., Carmichael, G. D. T., and Moffat, D. G. (1986). “Finite-element stress analysis of an equal diameter branch pipe intersection subjected to out-of-plane and twisting moments.” J. Strain Anal., 21(1), 9–16.
Kirkwood, M. G., and Moffat, D. G. (1994). “Plastic loads for piping branch junctions subjected to combined pressure and in-plane moment loads.” Proc. Inst. Mech. Eng., 208(E), 31–43.
Lee, K.-H., Xu, Y., Jeon, J.-Y., Kim, Y.-J., and Budden, P. J. (2012). “Plastic limit loads for piping branch junctions under out-of-plane bending.” J. Strain Anal., 47(1), 32–45.
Li, H., and Mackenzie, D. (2005). “Characterising gross plastic deformation in design by analysis.” Int. J. Press. Vessels Pip., 82(10), 777–786.
Mackenzie, D., and Li, H. (2006). “A plastic load criterion for inelastic design by analysis.” J. Pressure Vessel Technol., 128(1), 39–45.
Moffat, D. G. (1985). “Experimental stress analysis of four fabricated equal diameter branch pipe intersections subjected to moment loadings, and the implications on branch junction design.” Proc. Inst. Mech. Eng., 199(A), 261−284.
Muscat, M., Mackenzie, D., and Hamilton, R. (2003). “A work criterion for plastic collapse.” Int. J. Press. Vessels Pip., 80(1), 49–58.
Naruse, T., Mackenzie, D., and Camilleri, D. (2007). “Gross plastic deformation of a hemispherical head with cylindrical nozzle: A comparative study.” Proc., Pressure Vessel Technologies for the Power and Process Industries (PVP2007/CREEP8), ASME, New York, 431–438.
Nayak, G. G., and Zienkiewicz, O. C. (1972). “Elasto-plastic stress analysis. A generalization for various constitutive relations including strain softening.” Int. J. Numer. Methods Eng., 5(1), 113–135.
Sang, Z. F., Wang, Z. L., Xue, L. P., and Widera, G. E. O. (2005). “Plastic limit loads of nozzles in cylindrical vessels under out-of-plane moment loading.” Int. J. Press. Vessels Pip., 82(8), 638–648.
Schroeder, J. (1985). “Experimental limit couples for branch moment loads on 4-in. ANSI B16.9 tees.” WRC Bulletin 304, Welding Research Council, New York.
Schroeder, J., Srinivasaiah, K. R., and Graham, P. (1974). “Analysis of test data on branch-pipe connections exposed to internal pressure and/or external couples.” WRC Bulletin 200, Welding Research Council, New York.
Skopinskii, V. N. (2010). “Determination of plastic limit load for intersecting shells.” Chem. Petrol. Eng., 46(5–6), 341–346.
Skopinsky, V. N. (1993). “Numerical stress analysis of intersecting cylindrical shells.” J. Pressure Vessel Technol., 115(3), 275–282.
Skopinsky, V. N. (1996). “Stress analysis of nonradial cylindrical shell intersections subjected to external loading.” Int. J. Press. Vessels Pip., 67(2), 145–153.
Skopinsky, V. N. (2008). Stresses in intersecting shells, Fizmatlit, Moscow.
Skopinsky, V. N., and Berkov, N. A. (2013). “New criterion for the definition of plastic limit load in nozzle connections of pressure vessels.” J. Pressure Vessel Technol., 135(2), 021206.
Wang, W., Zou, X., and Yao, L. (2012). “A simplified strength checking approach for a header-nozzle intersection under combined piping loads.” J. Pressure Vessel Technol., 135(1), 011203.
Wu, B. H., Sang, Z. F., and Widera, G. E. O. (2010). “Plastic analysis for cylindrical vessels under in-plane moment on the nozzle.” J. Pressure Vessel Technol., 132(6), 061203.
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Published In
Journal of Engineering Mechanics
Volume 140 • Issue 8 • August 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Apr 26, 2013
Accepted: Dec 17, 2013
Published online: Feb 7, 2014
Discussion open until: Jul 7, 2014
Published in print: Aug 1, 2014
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