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RESEARCH PAPERS

The Flexibility of Curved Pipes in Creep

[+] Author and Article Information
J. T. Boyle, J. Spence

Department of Mechanics of Materials, University of Strathclyde, Glasgow, Scotland

J. Pressure Vessel Technol 99(3), 444-453 (Aug 01, 1977) (10 pages) doi:10.1115/1.3454558 History: Received July 09, 1976; Online October 25, 2010

Abstract

The redistribution of stress in a linear, thin shell model of a curved pipe creeping under the action of a constant applied in-plane bending moment is represented by an equation of evolution in time. Using finite differences, this continuous system is reduced to a finite set of initial value problems which are numerically integrated using a fifth order Runge-Kutta method. The flexibility of the curved pipe is compared to that of a similar elastic, and a similarly creeping, straight pipe. Results are compared with two simple approximate methods and with a previous-steady state analysis.

Copyright © 1977 by ASME
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