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Direct finite element route for design-by-analysis of pressure components

  • In the new European standard for unfired pressure vessels, EN 13445-3, there are two approaches for carrying out a Design-by-Analysis that cover both the stress categorization method (Annex C) and the direct route method (Annex B) for a check against global plastic deformation and against progressive plastic deformation. This paper presents the direct route in the language of limit and shakedown analysis. This approach leads to an optimization problem. Its solution with Finite Element Analysis is demonstrated for mechanical and thermal actions. One observation from the examples is that the so-called 3f (3Sm) criterion fails to be a reliable check against progressive plastic deformation. Precise conditions are given, which greatly restrict the applicability of the 3f criterion.

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Author:Manfred Staat
Document Type:Article
Year of Completion:2005
Publishing Institution:Fachhochschule Aachen
Date of the Publication (Server):2005/11/28
Tag:Analytischer Zulaessigkeitsnachweis; Einspiel-Analyse; Einspiel-Kriterium; alternierend Verformbarkeit; fortschreitende plastische Deformation
Alternating plasticity; Design-by-analysis; Progressive plastic deformation; Shakedown analysis; Shakedown criterion
GND Keyword:Einspielen <Werkstoff>; Plastizität; Deformation
Source:International Journal of Pressure Vessels and Piping 82 (2005)
Institutes:FH Aachen / Fachbereich Medizintechnik und Technomathematik
FH Aachen / IfB - Institut für Bioengineering
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 60 Technik / 600 Technik, Technologie