Pressure-Plus-Moment Limit-Load Analysis for a Cylindrical Shell Nozzle

[+] Author and Article Information
C. J. Tabone, R. H. Mallett

Swanson Engineering Associates Corporation, McMurray, Pa. 15317

J. Pressure Vessel Technol 109(3), 297-301 (Aug 01, 1987) (5 pages) doi:10.1115/1.3264867 History: Received June 27, 1986; Revised January 22, 1987; Online November 05, 2009


A finite element model of a nozzle in a cylindrical shell is analyzed for three cases; pressure, out-of-plane moment and combined pressure plus out-of-plane moment. The model uses three-dimensional finite elements and the analysis considers inelastic behavior at small displacements. Load versus displacement behavior is given for the three cases. Estimates of limit loads are obtained based upon extrapolation of load versus inverse displacement data curves. An interaction expression is used to show the effect of the combined loading for a case in which an internal pressure reduces the moment capability of the nozzle by 35 percent.

Copyright © 1987 by ASME
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