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RESEARCH PAPERS

Application of the Tearing-Mode Crack-Growth Instability Theory to a Cracked Pressure Vessel Nozzle

[+] Author and Article Information
G. G. Musicco

Washington University; Commission of European Communities, Ispra Establishment, Ispra (Varese), Italy

M. P. Rossow

Department of Engineering and Technology, Southern Illinois University, at Edwardsville, Edwardsville, Ill. 62026

B. A. Szabo

Washington University, St. Louis, Mo. 63130

J. Pressure Vessel Technol 103(1), 59-65 (Feb 01, 1981) (7 pages) doi:10.1115/1.3263371 History: Received July 25, 1979; Revised August 18, 1980; Online November 05, 2009

Abstract

The theory of tearing-mode crack-growth instability as developed by Paris and his associates is briefly outlined. Then the theory is applied to study the stability of a deep crack in a pressure vessel nozzle. The finite-element method is used to analyze the structure, which is idealized as a two-dimensional elastic-plastic body. Based on the theory and the results of the finite-element calculation, the stability (or instability) of the crack is predicted, as a function of pressure in the vessel. A detailed examination of the solution near the crack tip is made to verify that the necessary conditions for J-controlled crack growth are present.

Copyright © 1981 by ASME
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