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RESEARCH PAPERS: Offshore Mechanics

On the Response of Elastic-Plastic Tubes Under Combined Bending and Tension

[+] Author and Article Information
J. Y. Dyau, S. Kyriakides

Engineering Mechanics Research Laboratory, Department of Aerospace Engineering and Engineering Mechanics, The University of Texas at Austin, Austin, TX 78712

J. Offshore Mech. Arct. Eng 114(1), 50-62 (Feb 01, 1992) (13 pages) doi:10.1115/1.2919952 History: Received July 12, 1990; Revised February 13, 1991; Online June 12, 2008

Abstract

This paper is concerned with the response of long, relatively thin-walled tubes bent into the plastic range in the presence of axial tension. The work is motivated by the design needs of pipelines installed and operated in deep offshore waters. The problem is studied through a combination of experiment and analysis. In the experiments, long metal tubes were bent over a smooth, circular, rigid surface (mandrel). Bending of the tubes was achieved by shear and axial end loads. The experimental arrangement is such that a significant section of the test specimen is loaded and deformed in an axially uniform fashion. The ovalization induced in the specimen was measured as a function of the axial load in the tube for two mandrel radii. A two-dimensional numerical simulation of the problem has been developed and validated against the experimental results. This analysis was used to conduct a parametric study of the effect of tension on the ovalization induced in a long tube during bending.

Copyright © 1992 by The American Society of Mechanical Engineers
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