Asymmetric Collapse Modes of Pipes under Combined Bending and External Pressure
Publication: Journal of Engineering Mechanics
Volume 126, Issue 12
Abstract
The subject of pipe buckling and collapse under combined external pressure and bending is revisited in order to investigate the causes of angled buckles observed in recent experiments and the associated “scatter” in the critical loads. Stainless steel 304 tubes with D/t = 18.3 are bent to collapse under various values of external pressure. Tubes bent at pressures higher than 0.72P0 exhibited angled buckles which were oriented at 20° to 45° to the axis of bending. In this pressure regime the scatter in the results was larger than usual. At lower pressures, the tubes buckled in the expected mode with the flattening being along the axis of bending. A previously developed formulation is extended so that it can handle asymmetric imperfections and buckling modes. The analysis is first used to reproduce the experimental results and subsequently to study the problem parametrically. The orientation of the initial ovality is found to play a role in the final buckling mode and in the value of the critical curvature for bending under high values of pressure. In addition, residual stresses can interact with the initial ovality affecting the critical curvature both positively and negatively. For lower pressures these effects are small.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Brazier, L. G. ( 1927). “On the flexure of thin cylindrical shells and other thin sections.” Proc. Royal Soc. London, A116, 104–114.
2.
Corona, E., and Kyriakides, S. ( 1987). “An unusual mode of collapse of tubes under combined bending and pressure.” ASME J. Pressure Vessel Technol., 109, 302–304.
3.
Corona, E., and Kyriakides, S. ( 1988a). “On the collapse of inelastic tubes under combined bending and pressure.” Int. J. Solids and Struct., 24, 505–535.
4.
Corona, E., and Kyriakides, S. ( 1988b). “Collapse of pipelines under combined bending and pressure.” Proc., 5th Int. Conf. on Behaviour of Offshore Struct., Trondheim, Norway, 3, 953–964.
5.
Johns, T. G., Mesloh, R. E., Winegardner, R., and Sorenson, J. E. ( 1975). “Inelastic buckling of pipelines under combined loads.” Proc., Offshore Technol. Conf., OTC, Houston, Tex., II, 2209, 635–646.
6.
Ju, G. T., and Kyriakides, S. ( 1991). “Bifurcation versus limit load instability of elastic-plastic tubes under bending and pressure.” ASME J. Offshore Mech. and Arctic Engrg., 113, 43–52.
7.
Ju, G. T., and Kyriakides, S. ( 1992). “Bifurcation and localization instabilities in cylindrical shells under bending: part II predictions.” Int. J. Solids and Struct., 29, 1143–1171.
8.
Kyriakides, S., Corona, E., Madhavan, R., and Babcock, C. D. ( 1987). “Factors affecting pipe collapse-phase II. Final Report to the American Gas Association PR-106-512.” Engrg. Mech. Res. Lab. Rep. No. 87/8.
9.
Kyriakides, S., Corona, E., Madhavan, R., and Babcock, C. D. ( 1989). “Pipe collapse under combined pressure, bending and tension loads.” Proc., Offshore Technol. Conf., OTC, Houston, Tex., 6104, 1, 541–550.
10.
Kyriakides, S., Dyau, J.-Y., and Corona, E. ( 1994). “Pipe collapse under bending, tension and external pressure (BEPTICO). Computer Program Manual.” Engrg. Mech. Res. Lab. Rep. No. 94/4.
11.
Kyriakides, S., and Ju, G. T. ( 1992). “Bifurcation and localization instabilities in cylindrical shells under bending: part I experiments.” Int. J. Solids and Struct., 29, 1117–1142.
12.
Kyriakides, S., and Yeh, M.-K. ( 1988). “Plastic anisotropy in drawn metal tubes.” ASME J. Engrg. for Ind., 110, 303–307.
13.
Madhavan, R., Babcock, C. D., and Singer, J. ( 1993). “On the collapse of long, thick-walled tubes under external pressure and axial tension.” ASME J. Pressure Vessel Technol., 115, 15–26.
14.
Murphey, C. E., and Langner, C. G. ( 1985). “Ultimate pipe strength under bending, collapse and fatigue.” Proc., 4th Int. Conf. on Offshore Mech. and Arctic Engrg., 1, 467–477.
15.
Yeh, M.-K., and Kyriakides, S. ( 1986). “On the collapse of inelastic thick-walled tubes under external pressure.” ASME J. Energy Resour. Technol., 108, 35–47.
16.
Yeh, M.-K., and Kyriakides, S. ( 1988). “Collapse of deepwater pipelines.” ASME J. Energy Resour. Technol., 110, 1–11.
Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 126 • Issue 12 • December 2000
Pages: 1232 - 1239
History
Received: Mar 6, 2000
Published online: Dec 1, 2000
Published in print: Dec 2000
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.