Domain Integrals
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Green's function based finite element formulations for isotropic seepage analysis with free surface
Abstract A solution procedure using the Green's function based finite element method (FEM) is presented for two-dimensional nonlinear steady-state seepage analysis with the presence of free surface in isotropic dams. In the present algorithm, an iteration strategy is designed to convert the over-specified free surface problem to a regular partial differentia
Lat. Am. j. solids struct.. Publicado em: 2015-10
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2. Trefftz- type FEM for solving orthotropic potential problems
A simple Trefftz-type finite element method (TFEM) is proposed for solving certain potential problems in orthotropic media. The "body force", which is induced by internal sources or sinks, may produce domain integrals in the standard Trefftz finite element formulation. This will make the advantage "only-boundary integration" of TFEM lose entirely. To overcom
Lat. Am. j. solids struct.. Publicado em: 2014
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3. Boundary element method applied to the bending analysis of thin functionally graded plates
The present work introduces the boundary element method applied to the bending analysis of functionally graded plates. It is assumed that material properties are graded through the thickness direction of the plate according to a power law distribution. The neutral surface position for such plate is determined and the classical plate theory based on the exact
Lat. Am. j. solids struct.. Publicado em: 2013-05
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4. Modelagem direta de integrais de domínio usando funções de base radial no contexto do método dos elementos de contorno / Direct modeling of the domain integrals using radial basis functions in the context of the boundary element method
A pesquisa envolvida na presente dissertação se baseou no uso de funções de base radial para gerar uma nova formulação integral, que interpola diretamente o termo não homogêneo da equação diferencial de governo, no contexto do Método dos Elementos de Contorno (MEC). Emprega-se o uso de funções primitivas das funções de interpolação originais
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/10/2012
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5. Isotropic damage phenomena in saturated porous media: a bem formulation / Dano isotrópico em meios porosos saturados: uma formulação do método dos elementos de contorno
This work is devoted to the numerical analysis of saturated porous media, taking into account the damage phenomenon on the solid skeleton. The porous media is taken into poroelastic framework, in full-saturated condition, based on the Biots Theory. A scalar damage model is assumed for this analysis. An implicit Boundary Element Method (BEM) formulation, base
Publicado em: 2011
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6. Analysis of stress in thin plates of composite materials under dynamic load using the boundary element method / Analise de tensões em placas finas de materiais compositos sob carregamento dinamico usando o metodo dos elementos de contorno
This work presents a dynamic formulation of the boundary element method for stress and failure criterion analyses of anisotropic thin plates. Formulations use elastostatic fundamental solutions and inertia terms are treated as body forces. Domain integrals that come from body forces are transformed into boundary integrals using the radial integration method
Publicado em: 2009
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7. Boundary element method formulation for reinforced porous material / Formulação do método dos elementos de contorno para materiais porosos reforçados
In this work a nonlinear formulation of the boundary element method (BEM) is proposed to deal with saturated and unsaturated poro-elasto-plastic 2D reinforced domains. To model reinforced porous domains a BEM/FEM (Finite Element Method) modified coupling technique is employed. The coupling is made by using the least square method to regularize the displaceme
Publicado em: 2008
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8. Desenvolvimento de um novo algoritmo para análise viscoplástica com o método dos elementos de contorno. / Development of a new boundary elements algorithm for viscoplastic analysis.
The search for new mathematical models and innovative techniques for numerical analyses has been subject of many research studies. In analysis of models with infinite and semi-infinite domains, the Boundary Element Method (BEM) has been proved to be one of the most efficient numerical tools. On the other hand, in nonlinear analyses the BEM requires the evalu
Publicado em: 2007
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9. Boundary element formulation for shallow shell analysis / Formulação do método dos elementos de contorno para análise de cascas abatidas
O presente trabalho trata da análise numérica de cascas abatidas com o uso do método dos elementos de contorno (MEC). A formulação é desenvolvida a partir do acoplamento entre as equações integrais para flexão de placas delgadas e para estado plano de tensão. No esquema implementado, os termos sobre o contorno são avaliados a partir de processos a
Publicado em: 2006
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10. O MÉTODO HÍBRIDO DOS ELEMENTOS DE CONTORNO APLICADO A PROBLEMAS TRANSIENTES / THE HIBRID BOUNDARY ELEMENT METHOD APPLIED TO TRANSIENT PROBLEMS
More than three decades ago, Przemieniecki introduced a formulation for the free vibration analysis of bar and beam elements based on a power series of frequencies. Recently, this formulation was generalized for the analysis of the dynamic response of elastic systems submitted to arbitrary nodal loads as well as initial displacements. Based on the mode-super
Publicado em: 2002
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11. Análise do problema harmônico de radiação e difusão acústica, usando o método dos elementos de contorno. / Harmonic analysis of the acoustic radiation and scattering problems, using boundary element methods.
In this work, acoustic and elastic wave propagation problems in 2D, in frequency domain, are studied and formulated with the Boundary Element Methods. The formulation is based on the integral representations derived from the differential equations that govern the phenomena of acoustic wave propagation in a fluid medium and elastic wave propagation inside an
Publicado em: 2000