Local stress factors of pipe-nozzle due to radial load, circumferential and longitudinal moments

Document Type

Conference Proceeding

Publication Date

1-1-1993

Abstract

This paper presents a series of stress factor data which provide more detailed information for the calculation of local stresses at the nozzle region, as well as the pipe region, of a pipe-nozzle intersection, subjected to an external radial force, circumferential bending moment, and longitudinal bending moment, respectively. The pipe and nozzle thickness are assumed to be identical. Numerical data are obtained through the use of the finite element method. In obtaining the numerical solutions via ANSYS, the quadrilateral element is used to simulate the thin shell pipe-nozzle geometries. The local stresses, at eight different points on both the pipe and the nozzle at the intersections of the pipe's symmetric planes (longitudinal and transverse) are investigated. The resulting circumferential and longitudinal stresses, on the pipe and the nozzle, respectively, are first resolved into the bending and membrane components, and then further normalized into stress factors by the geometric parameters, beta, β, (nozzle radius/pipe radius), and gamma γ (pipe radius/pipe thickness). Presented in this paper are sixteen (16) stress factor plots for the external radial force, P, and eight (8) plots each for the external circumferential moment, Mc, and longitudinal bending moment, ML, respectively. The values of beta vary from 0.1 to 0.9 with values for gamma varying from 10 to 300. However, in the nozzle stress factor plots, when the product of beta and gamma are less than ten the results are not included since they are not in the thin shell range.

Identifier

0027247179 (Scopus)

ISBN

[0791809927]

Publication Title

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

ISSN

0277027X

First Page

307

Last Page

318

Volume

265

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