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Model adaptivity for finite element analysis of thin or thick plates based on equilibrated boundary stress resultants
Bohinc, Uroš (Avtor), Ibrahimbegović, Adnan (Avtor), Brank, Boštjan (Avtor)

URLURL - Predstavitvena datoteka, za dostop obiščite http://drugg.fgg.uni-lj.si/4433/ Novo okno
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Izvleček
Purpose – The purpose of this paper is to address error-controlled adaptive finite element (FE) method for thin and thick plates. A procedure is presented for determining the most suitable plate model (among available hierarchical plate models) for each particular FE of the selected mesh, that is provided as the final output of the mesh adaptivity procedure. Design/methodology/approach – The model adaptivity procedure can be seen as an appropriate extension to model adaptivity for linear elastic plates of so-called equilibrated boundary traction approach error estimates, previously proposed for 2D/3D linear elasticity. Model error indicator is based on a posteriori element-wise computation of improved (continuous) equilibrated boundary stress resultants, and on a set of hierarchical plate models. The paper illustrates the details of proposed model adaptivity procedure for choosing between two most frequently used plate models: the one of Kirchhoff and the other of Reissner-Mindlin. The implementation details are provided for a particular case of the discrete Kirchhoff quadrilateral four-node plate FE and the corresponding Reissner-Mindlin quadrilateral with the same number of nodes. The key feature for those elements that they both provide the same quality of the discretization space (and thus the same discretization error) is the one which justifies uncoupling of the proposed model adaptivity from the mesh adaptivity. Findings – Several numerical examples are presented in order to illustrate a very satisfying performance of the proposed methodology in guiding the final choice of the optimal model and mesh in analysis of complex plate structures. Originality/value – The paper confirms that one can make an automatic selection of the most appropriate plate model for thin and thick plates on the basis of proposed model adaptivity procedure.

Jezik:Angleški jezik
Ključne besede:plates, error analysis, finite element analysis, modelling, plate structures
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FGG - Fakulteta za gradbeništvo in geodezijo
Leto izida:2009
Založnik:Emerald
Št. strani:str. 69-99
Številčenje:Letn. 26, št. 1/2
UDK:624.073
ISSN pri članku:0264-4401
COBISS.SI-ID:4546401 Povezava se odpre v novem oknu
Število ogledov:330
Število prenosov:107
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
 
Skupna ocena:(0 glasov)
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Gradivo je del revije

Naslov:Engineering computations
Skrajšan naslov:Eng. comput.
Založnik:Pineridge Press
ISSN:0264-4401
COBISS.SI-ID:25396480 Novo okno

Sekundarni jezik

Jezik:Angleški jezik
Ključne besede:plošče, ocena napake, modelske napake

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