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RESEARCH PAPERS

Ratcheting of Pressurized Piping Subjected to Seismic Loading

[+] Author and Article Information
R. J. Scavuzzo, P. C. Lam, J. S. Gau

The Department of Mechanical Engineering, The University of Akron, Akron, OH 44325

J. Pressure Vessel Technol 114(3), 315-320 (Aug 01, 1992) (6 pages) doi:10.1115/1.2929046 History: Received October 10, 1990; Revised December 16, 1991; Online June 17, 2008

Abstract

The ABAQUS finite element code was used to model a pressurized pipe and subjected to cyclic bending loads to investigate ratcheting. A 1-in. schedule 40 pipe was loaded with a slow (static) cyclic load. The pipe internal pressure was varied from 0 to 6000 psi. Two types of materials were considered: an elastic perfectly plastic and a bilinear elastic-plastic material. Two types of finite elements of the ABAQUS program were compared to analytical solutions to evaluate the element accuracy in the plastic regime. Depending upon loading conditions and specified material properties, three different responses were observed from the finite element analyses: cyclic plasticity, ratcheting of the hoop strain, or shakedown. These analytical results are compared to some experimental measurements.

Copyright © 1992 by The American Society of Mechanical Engineers
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