Geometric Non Linear Analysis
Mostrando 1-12 de 37 artigos, teses e dissertações.
-
1. Physical and geometric non-linear analysis using the finite difference method for one-dimensional consolidation problem
Abstract This article presents a numerical model based on the finite difference method for the physical and geometric non-linear analysis of a one-dimensional consolidation problem regarding a saturated, homogeneous and isotropic soil layer with low permeability and high compressibility. The problem is formulated by adopting the void ratio as the primary var
REM, Int. Eng. J.. Publicado em: 2019-06
-
2. Numerical analysis of cold-formed double angles back-to-back under compression
Abstract Here-in, a numerical analysis based on the Finite Element Method (FEM) is proposed in order to investigate cold-formed steel back-to-back double angle structural behavior under compression. Considering non-linear analysis, an investigation was performed to analyze the influence of some aspects, such as the loading condition (concentric and eccentric
REM, Int. Eng. J.. Publicado em: 2017-12
-
3. Nonlinear Vibration and Mode Shapes of FG Cylindrical Shells
Abstract The nonlinear vibration and normal mode shapes of FG cylindrical shells are investigated using an efficient analytical method. The equations of motion of the shell are based on the Donnell’s non-linear shallow-shell, and the material is assumed to be gradually changed across the thickness according to the simple power law. The solution is provided
Lat. Am. j. solids struct.. Publicado em: 2017-03
-
4. Modelagem do comportamento dinâmico de edifícios mistos (aço-concreto) submetidos à ação do vento. / Modeling of the dynamic behaviour of steel-concrete composite buildings submited to wind actions.
Based on a favorable economic scenario and technological advances of material sciences and construction processes, in the last three decades, the Brazilian cities have presented a substantial growth, with respect to construction of residential and commercial multi-storey buildings. Nowadays, these buildings present greater slenderness and have been construct
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/05/2012
-
5. Integração numérica de sistemas não lineares semi-implícitos via teoria de controle geométrico / Numerical integration of non-linear semi-implicit square systems via geometric control theory.
This work improves a method to approximate solutions for a class of differential algebraic equations (DAEs), known as systems semi-implicit square. The method, called here MII, is based on geometric theory of decoupling for nonlinear systems combined with efficient techniques numerical analysis. It uses an algorithum that mixes symbolic and numerical calcula
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/11/2011
-
6. Sobre o acoplamento fluido-casca utilizando o método dos elementos finitos / On fluid-shell coupling using the finite element method
This work consists of the development of computational tools for nonlinear geometric fluid-shell interaction analysis using the Finite Element Method (FEM). The fluid solver is explicit and its time integration based on characteristics. The computational code is able to simulate the Navier-Stokes equations for compressible flows written in the Eulerian descr
Publicado em: 2011
-
7. 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
-
8. As ligações semirrígidas na análise avançada com zona plástica de portais planos de aço
In this work, the development of the Plastic-Zones Advanced Analysis of plane steel portals is studied, now including the connections effect. Firstly, this analysis is defined as inelastic second-order which capture the plasticity spread by slice technique and includes the Main Aspects as geometric (out-of-straight and out-of-plumb) and physical imperfection
Publicado em: 2010
-
9. Contribuição ao estudo dos pilares com seção transversal em formato geométrico de Lconsiderando a não-linearidade física e geométrica. / Contribution to the study of columns with l-shaped cross sections considering physical and geometric non-linearity.
Pilares de edifícios estão sempre submetidos à flexão composta oblíqua. Este trabalho tem como objetivo comparar, em seções transversais com formato geométrico de L, os resultados obtidos por dois métodos de cálculo: a) Integração numérica na qual, para cada direção principal, são utilizadas curvaturas reais obtidas de diagramas momentocurvat
Publicado em: 2010
-
10. Coupled thermal and structural analysis of steel columns under fire condition / Análise termoestrutural de pilares de aço em situação de incêndio
The most part of materials whose constitute fire protection elements or structural elements, such as steel columns, when exposed to high temperature have their strength and elasticity modulus reduced caused by thermal action. Therefore the structure can collapse earlier than in an ambient temperature situation. Based in this aspect, the objective of the pres
Publicado em: 2009
-
11. 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
-
12. Sobre a estabilidade de cantoneiras de aço formadas a frio submetidas à compressão / On the stability of cold-formed steel angles under compression
Apparently, the structural analysis of a simple angle under compression is an elementary problem, therefore, already largely known. However, cold-formed steel angles, mostly with slender legs, present two critical buckling modes: (i) global-flexural mode, in cases of high length members, (ii) and a coincident local-plate/global-torsional-flexural mode, which
Publicado em: 2008