Plate Instability
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. Large deflection and initial instability analysis of anisotropic plates by the generalized finite element method
Abstract This paper presents investigations laminated plates under moderately large transverse displacements and initial instability, through the Generalized Finite Element Methods - GFEM. The von Kármán plate hypothesis are used along with Kirchhoff and Reissner-Mindlin kinematic plate bending models to approximate transverse displacements and critical bu
Lat. Am. j. solids struct.. Publicado em: 28/10/2019
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2. Dynamic instability of imperfect laminated sandwich plates with in-plane partial edge load
Dynamic instability of laminated sandwich plates having inter-laminar imperfections with in-plane partial edge loading is studied for the first time using an efficient finite element plate model. The plate model is based on a refined higher order shear deformation plate theory, where the transverse shear stresses are continuous at the layer interfaces with s
Latin American Journal of Solids and Structures. Publicado em: 2010
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3. A new approach in the use of computational tools in teaching content of the discipline "Concrete Structures" in the Civil Engineering courses / Uma nova abordagem na utilização de ferramentas computacionais no ensino de conteúdos da disciplina estruturas de concreto em cursos de Engenharia Civil
This presentation analyzes the two computational tools, GPLAN (Plan Grills) and FTOOL (Two-Dimensional Frame Analysis Tool), and how they can be used in the content of "Concrete Structures" discipline, in Civil Engineering Graduation. The considered study is divided in two topics, being the first, the plan grills consideration (interaction plate/ beam) in th
Publicado em: 2009
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4. ELEMENTOS FINITOS ENRIQUECIDOS PARA FLAMBAGEM E VIBRAÇÃO DE PLACAS / ENRICHED FINITE ELEMENTS FOR BUCKLING AND VIBRATION OF SHELLS
The focus of the present work is to developand evaluate enriched elements used to obtain critical loads, frequencies of vibration and respective modes for two-dimensional structural components (rectangular plates in bending under inplane compressive loading). The Rayleigh-Ritz approximation method has been employed, directed to the use of conventional finite
Publicado em: 2007
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5. ANÁLISE E CONTROLE PASSIVO DAS VIBRAÇÕES DE PLACAS RETANGULARES / ANALYSIS AND PASSIVE CONTROL OF RECTANGULAR PLATES
Neste trabalho é apresentado um método numérico de resolução para a equação diferencial de placas: o método de Galerkin Iterativo. O método é utilizado para obtenção das cargas críticas de flambagem e das freqüências naturais para placas retangulares com condições de contorno arbitrárias. São determinados ainda os modos de vibração de pl
Publicado em: 2007
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6. Modeling and optimization of piezoelectric shunts apply to passive vibration control / Modelagem numérica e otimização de shunts piezelétricos aplicados ao controle passivo de vibrações
Due to the development of new technologies, industrial structures are now made of lighter materials and work at higher operation speeds producing an increasing vibration and noise level generation. As a result, different techniques of active and passive control have been developed and are continuously being improved. Among the passive control techniques, the
Publicado em: 2007
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7. Active flutter suppression in a 2-D airfoil using linear matrix inequalities techniques
Flutter is an in-flight vibration of flexible structures caused by energy in the airstream absorbed by the lifting surface. This aeroelastic phenomenon is a problem of considerable interest in the aeronautic industry, because flutter is a potentially destructive instability resulting from an interaction between aerodynamic, inertial, and elastic forces. To o
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2006-03
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8. Fenômenos de instabilidade do arco na soldagem GMAW com gases de baixo potencial de oxidação
The arc welding process with continuous wire and gas protection (GMAW) is currently one of the most important metal joining process. This process has passed through a constant evolution with the introduction of power supplies with electronic control, and the use of techniques to control metal transfer, its operational stability and weld bead formation. Moreo
Publicado em: 2006
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9. Theoretical and experimental analysis of cold-formed steel members under compression / Análise teórica e experimental de perfis de aço formados a frio submetidos à compressão
Cold-formed steel members present, in general, higher local slenderness than classical hot- rolled ones, which make them more prone to local buckling. Besides, thin-walled open sections have small torsional stiffness, and hence global torsional and flexural-torsional instability modes are many times more critical than global flexural ones. Also, distortional
Publicado em: 2006
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10. COMPORTAMENTO CRÍTICO E PÓS-CRÍTICO DE PLACAS DOBRADAS / BUCKLING AND POST-BUCKLING BEHAVIOR OF FOLDED PLATES
O presente trabalho tem por objetivo estudar o comportamento crítico e pós-crítico de placas dobradas. Placas dobradas, tanto de aço quanto de concreto, têm sido usadas com grande freqüência em obras de engenharia, particularmente como paredes portantes e coberturas de grandes vãos. Neste último caso, placas dobradas têm uma aplicação semelhante
Publicado em: 2005
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11. CARACTERIZAÇÃO DO ESCOAMENTO DE LÍQUIDOS VISCOELÁSTICOS NO PROCESSO DE REVESTIMENTO POR ROTAÇÃO DIRETA / FILM - SPLITTING FLOWS OF VISCOELASTIC LIQUIDS VISUALIZATION
Roll coating is a common method in the manufacture of a wide variety of products. It is used to apply a thin liquid layer to a continuous flexible substrate. At low speeds, the flow is two-dimensional and steady; as the roll speed is raised, the two-dimensional flow is unstable and is replaced by a steady three-dimensional flow, which results in more or less
Publicado em: 2005
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12. Irreversible Effects of Serum Proteins on Beta-Lactam Antibiotics
The chromogenic cephalosporin nitrocefin (87/312) demonstrates rapid and visible instability to serum from many species. This phenomenon was distinct from serum binding, being significantly slower. Destruction of another cephalosporin, 10485, by serum appeared to account for some anomalous results during investigation into its human pharmacokinetics. Many ce