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Formulação não-linear geométrica para análise de cascas usando elementos finitos tridimensionais degenerados

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hdl:2099/7347

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Ribeiro, Fernando B.
Landau, Luiz
Document typeArticle
Defense date1991
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
Apresenta-se neste trabalho uma formulas50 Lagrangeana total para análise nao-linear geométrica de estruturas de cascas utilizando-se elementos'finitos tridimensionais degenerados. A geometria do elemento é representada pelas normais e coordenadas dos nós da superficie média. O campo de deslocamentos permite a considerasáo de grandes rotasoes, e é descrito a partir das transla~oesd os nós da superficie média e de duas rotasoes das normais em torno de eixos locais. Emprega-se um esquema de transformacáo seletiva destas rotasoes para o sistema global de referencia, o que possibilita a análise de estruturas definidas por superficies poliédricas.
 
A total Lagrangian formulation for geometrically non-linear analysis of sheli structures using three-dimensional degenerated elements is presented. The geometric definition of the element is given by the normais and coordinates of the mid-surface nodes. The displacement field allows the consideration of large rotations and, is described by the translations of the midsurface nodes and two rotations of the normais about local axes. A selective transformation scheme of the rotation, from local to global axes, is employed in order to extend this procedure to the case of sheii structures defined by folded surfaces.
URIhttp://hdl.handle.net/2099/7347
ISSN1886-158X
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  • Revista internacional de métodos numéricos para cálculo y diseño en ingeniería - 1991, vol. 7, núm. 3 [6]
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