Finite element analysis of piping-nozzle connections. Part II. Localized stresses

Document Type

Conference Proceeding

Publication Date

1-1-1990

Abstract

This paper presents a comprehensive study of the localized stresses at piping-nozzles by the finite element method. Three types of loading are discussed: radial force, circumferential moment, and longitudinal moment. This problem was previously studied by Bijlaard in 1955, using double Fourier series solutions. He used distributed loading on a surface area of a cylinder (without an opening) to simulate various loadings on the nozzle-to-pipe connection. Due to computational difficulty, the beta value (nozzle rad./pipe rad.) was taken only up to 0.55. In this paper, using ANSYS FEM code, we use a thin shell element model to simulate the real nozzle-to-pipe connection (with openning) with beta values from 0.1 to 0.9. The bending and membrane stress factors generated by these loadings are presented in a series of plots with gamma (piping length/radius) values from 5 to 200. These stress factors are ready to replace those previously published in WRC No. 107.

Identifier

0025146676 (Scopus)

Publication Title

American Society of Mechanical Engineers Pressure Vessels and Piping Division Publication PVP

ISSN

0277027X

First Page

57

Last Page

64

Volume

194

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