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

URLURL - Predstavitvena datoteka, za dostop obiščite http://drugg.fgg.uni-lj.si/3510/ Novo okno
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Izvleček
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.

Jezik:Angleški jezik
Ključne besede:higher-order shell model, 3d constitutive equations, stress computation
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FGG - Fakulteta za gradbeništvo in geodezijo
Leto izida:2008
Založnik:Techno Press
Št. strani:Str. 85-108
Številčenje:Letn. 33, Št. 1
UDK:624.074.4
ISSN pri članku:1526-1492
COBISS.SI-ID:4418145 Povezava se odpre v novem oknu
Število ogledov:426
Število prenosov:101
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
 
Skupna ocena:(0 glasov)
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Gradivo je del revije

Naslov:Computer modeling in engineering & sciences
Skrajšan naslov:Comput. model. eng. sci.
Založnik:Tech Science Press
ISSN:1526-1492
COBISS.SI-ID:1931361 Novo okno

Sekundarni jezik

Jezik:Angleški jezik
Ključne besede:lupine, 3d napetosti

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