Geometrically Nonlinear Analysis
Mostrando 1-12 de 25 artigos, teses e dissertações.
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1. Optimization of geometrically nonlinear truss structures under dynamic loading
Abstract The goal of this article is to present the formulation of the optimization problem of truss structures with geometric nonlinearity under dynamic loads and provide examples of this problem. The formulated optimization problem aims to determine the cross-sectional area of the bars that minimizes the weight of the structure, imposing constraints on nod
REM, Int. Eng. J.. Publicado em: 2020-09
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2. Large Displacement Static Analysis of Composite Elliptic Panels of Revolution having Variable Thickness and Resting on Winkler-Pasternak Elastic Foundation
Abstract Nonlinear static response of laminated composite Elliptic Panels of Revolution Structure(s) (EPRS) having variable thickness resting on Winkler-Pasternak (W-P) Elastic Foundation is investigated in this article. Generalized Differential Quadrature (GDQ) method is utilized to obtain the numerical solution of EPRS. The first-order shear deformation th
Lat. Am. j. solids struct.. Publicado em: 20/12/2019
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3. Analysis of Geometrically Nonlinear Vibrations of Functionally Graded Shallow Shells of a Complex Shape
Abstract Geometrically nonlinear vibrations of functionally graded shallow shells of complex planform are studied. The paper deals with a power-law distribution of the volume fraction of ceramics and metal through the thickness. The analysis is performed with the use of the R-functions theory and variational Ritz method. Moreover, the Bubnov-Galerkin and the
Lat. Am. j. solids struct.. Publicado em: 2017-09
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4. Numerical Analysis of Geometrically Non-Linear Behavior of Functionally Graded Shells
Abstract In this paper, a geometrically nonlinear analysis of functionally graded material (FGM) shells is investigated using Abaqus software. A user defined subroutine (UMAT) is developed and implemented in Abaqus/Standard to study the FG shells in large displacements and rotations. The material properties are introduced according to the integration points
Lat. Am. j. solids struct.. Publicado em: 2017
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5. Geometrically nonlinear analysis of thin-walled laminated composite beams
Abstract The use of thin-walled composite beams in Engineering has attracted great interest in recent years. Composite beams and other structural elements tend to have thin walls due to the high strength of the material. Other important aspect is that, even without reaching large strains and without overcoming the elastic limit of the material, such as beams
Lat. Am. j. solids struct.. Publicado em: 2015-11
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6. Application of the Complex Variable Semi-analytical Method for Improved Displacement Sensitivity Evaluation in Geometrically Nonlinear Truss Problems
AbstractThe application of gradient-based methods to structural optimization problems usually requires the determination of displacement sensitivities with respect to design variables. In this regard, it is important to have at hand comprehensive methods for sensitivity analysis, which show stability, efficiency and accuracy. Particularly, application of the
Lat. Am. j. solids struct.. Publicado em: 2015-05
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7. Nonlinear Equilibrium and Stability Analysis of Axially Loaded Piles Under Bilateral Contact Constraints
AbstractThis paper presents a nonlinear stability analysis of piles under bilateral contact constraints imposed by a geological medium (soil or rock). To solve this contact problem, the paper proposes a general numerical methodology, based on the finite element method (FEM). In this context, a geometrically nonlinear beam-column element is used to model the
Lat. Am. j. solids struct.. Publicado em: 2015-04
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8. Sobre modelos constitutivos não lineares para materiais com gradação funcional exibindo grandes deformações: implementação numérica em formulação não linear geométrica / On nonlinear constitutive models for functionally graded materials exhibiting large strains: numerical implementation in geometrically nonlinear formulation
O objetivo precípuo deste estudo é a implementação computacional de modelos constitutivos elásticos e elastoplásticos para materiais com gradação funcional em regime de grandes deslocamentos e elevadas deformações. Para simular numericamente um problema estrutural, são empregados aqui elementos finitos sólidos (tetraédrico e hexaédrico) com ord
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/04/2012
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9. Geometrically non-linear analysis of inclined elastic rods subjected to self-weight
The behavior of inclined slender elastic rods subjected to axial forces and distributed load is discussed in this paper. Mathematical models and numerical solutions are developed for small and large displacements. A double-hinged boundary condition is assumed and the analysis is carried out for different values of non-dimensional weight (distributed load) an
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2012-03
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10. Pilares de concreto armado em situação de incêndio submetidos à flexão normal composta. / Reinforced concrete columns in fire under uniaxial bending.
According to Brazilian Codes, reinforced concrete structures must be verified under high temperatures, in order to assure the load bearing capacity to allow the safe evacuation of the users and the fire fighting and to reduce the fire spread to other compartments. For reinforced concrete structures, the columns must be analyzed carefully. The significant red
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/05/2011
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11. Optimization of laminated composite plates and shells using genetic algorithms, neural networks and finite elements
Structural optimization using computational tools has become a major research field in recent years. Methods commonly used in structural analysis and optimization may demand considerable computational cost, depending on the problem complexity. Therefore, many techniques have been evaluated in order to diminish such impact. Among these various techniques, Art
Latin American Journal of Solids and Structures. Publicado em: 2011
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12. A estrutura do espaço visual e a percepção de colinearidade no campo aberto: análise de procedimentos, teste de modelos e aspectos cognitivos / The structure of visual space and the perception of collinearity in open field: analysis of procedures, model testing and cognitive aspects
The purpose of the present work was to investigate, using a spatial configuration of collinear stimuli in the open field, the accuracy and stability of the adjustments and distance estimates. Aspects related with the collinearity task were analyzed and the data confronted with the phenomenon of the anisotropy of perceived space. In addition, the results were
Publicado em: 2010