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On Prediction of 3d Stress State in Elastic Shell by Higher-order Shell Formulations
ID Brank, Boštjan (Author), ID Ibrahimbegović, Adnan (Author), ID Bohinc, Uroš (Author)

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PID: 20.500.12556/rul/c36e4580-22a6-47be-97af-2496df70017e

Abstract
In this work we study the accuracy of modem higher-order shell finite element formulations in computation of 3d stress state in elastic shells. In that sense we compare three higher-order shell models: (i) with seven dislacement-like kinematic parameters, and (ii, iii) with six displacement-like kinematic parameters plus one strain-like kinematic parameter introduced by two different versions of enhanced assumed strain (EAS) concept. The finite element approximations of all shell models are based on 4-node quadrilateral elements. Geometrically nonlinear and consistently linearized forms of considered formulations are given. Several numerical examples are presented, where computed stresses are compared with analytical solutions. It was found that through-the-thickness variation of some (non-dominant) stress tensor components, including through-the-thickness normal stress, may be computed very inaccurately. The reliable representation for those stresses can be interpreted only if the ``layer-wise'' averaging or the through-the-thickness averaging is performed.

Language:English
Keywords:higher-order shell model, 3d constitutive equations, stress computation
Typology:1.01 - Original Scientific Article
Organization:FGG - Faculty of Civil and Geodetic Engineering
Publisher:Techno Press
Year:2008
Number of pages:Str. 85-108
Numbering:Letn. 33, Št. 1
PID:20.500.12556/RUL-32144 This link opens in a new window
UDC:624.074.4
ISSN on article:1526-1492
COBISS.SI-ID:4418145 This link opens in a new window
Publication date in RUL:10.07.2015
Views:2754
Downloads:508
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Record is a part of a journal

Title:Computer modeling in engineering & sciences
Shortened title:Comput. model. eng. sci.
Publisher:Tech Science Press
ISSN:1526-1492
COBISS.SI-ID:1931361 This link opens in a new window

Secondary language

Language:English
Keywords:lupine, 3d napetosti

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