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RESEARCH PAPERS

A Simplified Analysis Method for Complex Piping Systems in Elastic-Plastic-Creep Range

[+] Author and Article Information
O. Watanabe

Institute of Engineering Mechanics, University of Tsukuba, Sakura, Ibaraki, Japan

H. Ohtsubo

Department of Naval Architecture, University of Tokyo, Hongo, Tokyo, Japan

J. Pressure Vessel Technol 107(2), 148-156 (May 01, 1985) (9 pages) doi:10.1115/1.3264427 History: Received June 07, 1984; Revised February 06, 1985; Online November 05, 2009

Abstract

The present paper describes a simplified finite element method for analysis of behavior of complex piping systems under elevated temperature. Elastic-plastic-creep deformations of a piping system under a combined moment loading can be analyzed by the present method. The system is idealized by straight and curved beams, and derivation of the finite element equation is based on the force method. The unified constitutive relations are used for creep and plastic behavior, where plastic deformation is treated as a limiting case of creep. The numerical results are compared with previous experimental ones, which verifies the validity of the proposed method. Elastic follow-up problem of a piping system of actually complex configuration is also solved by the present method.

Copyright © 1985 by ASME
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