The Finite Element Method Positional
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Modeling the creep behavior of GRFP truss structures with Positional Finite Element Method
Abstract This paper presents the development of a formulation, based on Positional Finite Element Method, to describe the viscoelastic mechanical behavior of space trusses. The numerical method used was chosen due to its efficiency in the applications concerning nonlinear numerical analyses. The formulation describes the positional variation over time under
Lat. Am. j. solids struct.. Publicado em: 26/04/2018
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2. A Simple FEM Formulation Applied to Nonlinear Problems of Impact with Thermomechanical Coupling
Abstract The thermal effects of problems involving deformable structures are essential to describe the behavior of materials in feasible terms. Verifying the transformation of mechanical energy into heat it is possible to predict the modifications of mechanical properties of materials due to its temperature changes. The current paper presents the numerical d
Lat. Am. j. solids struct.. Publicado em: 2017
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3. Location Issues of Thin Shell Parts in the Reconfigurable Fixture for Trimming Operation
ABSTRACT: The location of thin shell parts is always a knotty problem during machining, welding, forming, assembling and inspection operations. This paper mainly focuses on the special location issues in the digital and flexible trimming process for aircraft skins fastened by reconfigurable fixture. Firstly, in view of the dynamic change of effective locator
J. Aerosp. Technol. Manag.. Publicado em: 2014-09
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4. A shell finite element formulation to analyze highly deformable rubber-like materials
Abstract: In this paper, a shell finite element formulation to analyze highly deformable shell structures composed of homogeneous rubber-like materials is presented. The element is a triangular shell of any-order with seven nodal parameters. The shell kinematics is based on geometrically exact Lagrangian description and on the Reissner-Mindlin hypothesis. Th
Lat. Am. j. solids struct.. Publicado em: 2013-11
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5. Análise não linear geométrica de pórticos planos considerando ligações semirrígidas elastoplásticas / Geometric nonlinear analysis of plane frames considering elastoplastic semi-rigid connections
Neste trabalho foi implementada uma técnica para considerar ligações semirrígidas elastoplásticas para a análise não linear geométrica de pórticos planos. As ligações semirrígidas foram consideradas com o comportamento elastoplástico multilinear e modeladas via o Método dos Elementos Finitos (MEF). Esta técnica foi acoplada ao programa AcadFra
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/06/2012
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6. Non linear geometric analysis of soil-structure interaction via BEM/FEM coupling / Análise não linear geométrica do acoplamento solo-estrutura através da combinação MEC-MEF
This work presents an alternative coupling of the boundary element method (BEM) and the finite element method (FEM) to create a computer program for non linear geometric analysis of frames coupled to continuous domains, applied to soil-structure interaction. A linear elastic behavior is considered for the soil, modeled by BEM. An alternative formulation is a
Publicado em: 2010
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7. Estudo e desenvolvimento de código computacional para análise de impacto entre estruturas levando em consideração efeitos térmicos / Study and development of computational code to analyze impact in structures considering thermal effects
It becomes quite important study the thermal effects when considering impact in structures, because besides the mechanical energy changing into heat, one may consider the changes in the material properties due overheating. In this sense, the main goal of this work is develop a thermodynamic formulation and its implementation, based in the Helmholtz free-ener
Publicado em: 2009
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8. Metodo dos elementos finitos posicional aplicado a analise estatica de risers / Positional finite element method applied to the analysis of risers behaviour
A dissertação é dedicada ao estudo do comportamento estrutural estático de risers rígidos montados em catenária para aplicações na exploração de petróleo em águas profundas. Estuda-se o problema de equilíbrio estático de risers, no qual é considerado o efeito do peso próprio, do empuxo, e a interação com o solo. Para tanto, utiliza-se do M�
Publicado em: 2009
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9. Elastic nonlinear geometric analysis with positional finite element method / Análise de problemas elásticos não lineares geométricos empregando o método dos elementos finitos posicional
Non linear geometric analysis for 2D frames and 3D solids are analyzed in this work by employing the finite element method with positional description. The present formulation does not use the concept of displacement; it considers positions as the real variables of the problem. In addition, the formulation is developed through total lagrangian description. B
Publicado em: 2008
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10. Modelos constitutivos para materiais hiperelásticos: estudo e implementação computacional / Constitutive models for hyperelastic materials: study and computational implementation
The main objective of this work is to implement nonlinear hyperelastic constitutive models in a computational code of geometrically nonlinear analysis of shells. For this purpose, concepts of linear and tensor algebras, kinematics, strain, stress, balances, variational principles, numerical methods and hyperelasticity are necessary. Such program uses the pos
Publicado em: 2008
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11. Improvement of formulation of identification and solution of the bidimensional impact between structure and rigid wall / Aprimoramento de formulação de identificação e solução do impacto bidimensional entre estrutura e anteparo rígido
This work has as main goal the development of a formulation, based on the finite element method (FEM), for the identification and solution of the bidimensional nonlinear impact between reticulated cyclics structures and fixed rigid wall. The dynamic geometrically nonlinear behavior is treated with a positional formulation classified as total Lagrangean with
Publicado em: 2008
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12. Study and development of computational code based on the finite element method to dynamic geometrically nonlinear analysis of bidimensional solids / Estudo e desenvolvimento de código computacional baseado no método dos elementos finitos para análise dinâmica não linear geométrica de sólidos bidimensionais
The main goal of this work is the development of a formulation and its computational implementation, based on the finite element method (FEM), to analyze the dynamic geometrically nonlinear behavior of bidimensional solids. The geometrically nonlinear behavior is treated with a positional formulation classified as total Lagrangean with exact kinematics. In t
Publicado em: 2006