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RESEARCH PAPERS

Analysis of Interaction Behavior of Surface Flaws in Pressure Vessels

[+] Author and Article Information
P. E. O’Donoghue, T. Nishioka, S. N. Atluri

Center for the Advancement of Computational Mechanics, School of Civil Engineering, Georgia Institute of Technology, Atlanta, Ga. 30332

J. Pressure Vessel Technol 108(1), 24-32 (Feb 01, 1986) (9 pages) doi:10.1115/1.3264748 History: Received September 26, 1984; Revised March 08, 1985; Online November 05, 2009

Abstract

The evaluation of stress intensity factors for surface flaw problems and, in particular, semi-elliptical surface cracks in cylindrical pressure vessels has been well developed using the finite element alternating method. Some of the examples presented here include the interaction effects due to multiple internal longitudinal surface cracks in cylinders as recommended for analysis in the ASME Boiler and Pressure Vessel Code (Section XI). For each crack geometry, several loading cases are considered including internal pressure and polynomial pressure loadings from constant to fourth order. By the method of superposition, the magnification factors for internally pressurized cylinders are rederived using the polynomial influence functions. These influence functions give useful information for design purposes such as in the analysis of a thermally shocked cylinder. The problem of a single circumferential crack in a cylinder is also investigated using the finite element alternating method, and a number of results for such problems are also presented here.

Copyright © 1986 by ASME
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