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RESEARCH PAPERS

Bending and Twisting of Pipes With Strain Hardening

[+] Author and Article Information
J. H. Lau

Sandia National Laboratory, Albuquerque, N.M.

T. T. Lau

Hewlett-Packard, Palo Alto, Calif. 94304

J. Pressure Vessel Technol 106(2), 188-195 (May 01, 1984) (8 pages) doi:10.1115/1.3264327 History: Received January 28, 1983; Revised February 16, 1984; Online November 05, 2009

Abstract

A closed-form solution is presented for the small deformation analysis of a straight thin-walled circular cylinder subjected to the simultaneous action of bending and twisting moments. Dimensionless interaction curves and charts which relate the variables, bending moment, curvature, maximum effective strain, twisting moment, and shear strain are also provided for engineering practice convenience. The average stress-strain diagram of the cylinder is described by two straight lines. The result presented herein is not only a good approximation of a wide class of piping materials, but also provides a standard tool for estimating the accuracy of different direct schemes such as numerical integration, finite-difference, and finite-element methods.

Copyright © 1984 by ASME
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