Author(s)

J. Blachut

Abstract

Maximum first cycle shakedown pressures are obtained numerically for mild steel domes fitted with a short cylindrical flange. Meridional shape is sought within elliptical profiles whilst the wall thickness distribution is described by the third order polynomial. The optimization method is based on Genetic Algorithms in which finite element re-analyses are employed. 1. Introduction It is now recognized that localized stressing beyond yielding is admissible in pressure vessel components made from ductile materials without the loss of their structural integrity. The concept of plastic loads and the concept of shakedown have been developed to aid the design of these components [1-5]. A requirement of shakedown into the purely elastic state needs to be considered

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