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ORIGINAL PAPER
Plastic limit load of ellipsoidal pressure vessel head with nozzle under internal pressure loading
1
Moscow State Industrial University Avtozavodskaya 16, 115280, Moscow, RUSSIA
Online publication date: 2014-03-07
Publication date: 2013-12-01
International Journal of Applied Mechanics and Engineering 2013;18(4):1263-1274
KEYWORDS
shell intersectionelastic-plastic finite element analysisplastic limit loadellipsoidal headnozzle connection
ABSTRACT
A new method and numerical procedure for determining the plastic limit load in an ellipsoid-cylinder intersection using the elastic-plastic finite element analysis are presented. The proposed method is based on the maximum criterion of the rate of change of the relative plastic work. For the elastic-plastic analysis of the nozzle connections the 2D finite element method and plasticity theory with strain hardening are used. The results of the comparison of the plastic limit pressure obtained on the basis of different known criteria and the proposed criterion are presented. A parametric study of ellipsoidal heads with a nozzle under internal pressure loading was performed. The effects of nondimensional geometric parameters of shell intersection on the plastic limit pressure are discussed.
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