Nonlinear Response and Failure of Steel Elbows Under In-Plane Bending and Pressure-Reference-Cited by-同舟云学术

Nonlinear Response and Failure of Steel Elbows Under In-Plane Bending and Pressure

Published:2003-11-01 Issue:4 Volume:125 Page:393-402
ISSN:0094-9930
Container-title:Journal of Pressure Vessel Technology
language:en
Short-container-title:

Author:

Karamanos S. A.¹,Giakoumatos E.¹,Gresnigt A. M.²

Affiliation:

1. Department of Mechanical and Industrial Engineering, University of Thessaly, Volos 38334, Greece

2. Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft 2600 GA, The Netherlands

Abstract

The paper investigates the response of elbows under in-plane bending and pressure, through nonlinear finite element tools, supported by experimental results from real-scale tests. The finite element analysis is mainly based on a nonlinear three-node “tube element,” capable of describing elbow deformation in a rigorous manner, considering geometric and material nonlinearities. Furthermore, a nonlinear shell element from a general-purpose finite element program is employed in some special cases. Numerical results are compared with experimental data from steel elbow specimens. The comparison allows the investigation of important issues regarding deformation and ultimate capacity of elbows, with emphasis on relatively thin-walled elbows. The results demonstrate the effects of pressure and the influence of straight pipe segments. Finally, using the numerical tools, failure of elbows under bending moments is examined (cross-sectional flattening or local buckling), and reference to experimental observations is made.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Safety, Risk, Reliability and Quality

Link

http://asmedigitalcollection.asme.org/pressurevesseltech/article-pdf/125/4/393/5741059/393_1.pdf

Reference34 articles.

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2. Pardue, T. E., and Vigness, J., 1951, “Properties of Thin-Walled Curved Tubes of Short-Bend Radius,” Trans. ASME, 73, pp. 77–87.

3. Gross, N. , 1952, “Experiments on Short-radius Pipe-bends,” Proceedings of the Institution of Mechanical Engineers (B), 1B, pp. 465–479.

4. Gross, N., and Ford, H., 1952, “The Flexibility of Short-radius Pipe-bends,” Proceedings of the Institution of Mechanical Engineers (B), 1B, pp. 480–491.

5. Rodabaugh, E. C., and George, H. H., 1957, “Effect of Internal Pressure on the Flexibility and Stress Intensification Factors of Curved Pipe or Welding Elbows,” Trans. ASME, 79, pp. 939–948.

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