Local and global collapse pressure of longitudinally flawed pipes and cylindrical vessels

  • Limit loads can be calculated with the finite element method (FEM) for any component, defect geometry, and loading. FEM suggests that published long crack limit formulae for axial defects under-estimate the burst pressure for internal surface defects in thick pipes while limit loads are not conservative for deep cracks and for pressure loaded crack-faces. Very deep cracks have a residual strength, which is modelled by a global collapse load. These observations are combined to derive new analytical local and global collapse loads. The global collapse loads are close to FEM limit analyses for all crack dimensions.

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Metadaten
Author:Manfred Staat
DOI:http://dx.doi.org/10.21269/72
Document Type:Article
Language:English
Year of Completion:2005
Date of the Publication (Server):2005/11/23
Tag:Axialbelastung; FEM; Grenzwertberechnung; Traglastanalyse
Axially cracked pipe; Global and local collapse; Limit analysis; Pressure loaded crack-face
GND Keyword:Axialbelastung; Finite-Elemente-Methode; Grenzwertberechnung
Source:International Journal of Pressure Vessels and Piping 82 (2005), Seite 217–225 ; http://dx.doi.org/10.1016/j.ijpvp.2004.07.022
Institutes:FH Aachen / Fachbereich Medizintechnik und Technomathematik
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 60 Technik / 600 Technik, Technologie

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