Functionally Graded Materials
Mostrando 13-24 de 29 artigos, teses e dissertações.
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13. Closed-form Solution for Freely Vibrating Functionally Graded Thick Doubly Curved Panel-A New Generic Approach
Abstract Today, double curvature shell panels are the main parts of each design because their geometrical characteristics provide high strength to weight ratio, aerodynamic form and beauty for the structures such as boats, submarines, automobiles and buildings. Also, functionally graded materials which present multiple properties such as high mechanical and
Lat. Am. j. solids struct.. Publicado em: 2015-09
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14. Closed-form elasticity solution for three-dimensional deformation of functionally graded micro/nano plates on elastic foundation
This paper addresses the static deformation of simply supported rectangular micro/nano plates made of functionally graded (FG) materials based on the three-dimensional nonlocal elasticity theory of Eringen. The plates are assumed to be simply supported and rested on a Winkler-Pasternak elastic foundation. Elasticity modulus is assumed to obey an exponential
Lat. Am. j. solids struct.. Publicado em: 2015-08
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15. Semi-analytical Vibration Characteristics of Rotating Timoshenko Beams Made of Functionally Graded Materials
AbstractFree vibration analysis of rotating functionally graded (FG) thick Timoshenko beams is presented. The material properties of FG beam vary along the thickness direction of the constituents according to power law model. Governing equations are derived through Hamilton's principle and they are solved applying differential transform method. The good agre
Lat. Am. j. solids struct.. Publicado em: 2015-07
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16. Novel Layerwise Shear Correction Factors for Zigzag Theories of Circular Sandwich Plates with Functionally Graded Layers
AbstractThe available shear correction factors have mainly been proposed for single-layer rectangular plates with zero shear tractions and isotropic homogenous materials. The present analytical shear factors are especially suitable for the first-order zigzag or layerwise theories of circular sandwich plates with functionally graded cores/face sheets and simu
Lat. Am. j. solids struct.. Publicado em: 2015-07
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17. Three dimensional Free Vibration and Transient Analysis of Two Directional Functionally Graded Thick Cylindrical Panels Under Impact Loading
AbstractIn this paper three dimensional free vibration and transient response of a cylindrical panel made of two directional functionally graded materials (2D-FGMs) based on three dimensional equations of elasticity and subjected to internal impact loading is considered. Material properties vary through both radial and axial directions continuously. The 3D g
Lat. Am. j. solids struct.. Publicado em: 2015-04
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18. A complete set of equations for piezo-magnetoelastic analysis of a functionally graded thick shell of revolution
Tensor analysis and an orthogonal curvilinear coordinate system have been used to derive a complete set of equations for piezo-magneto-elastic analysis of a functionally graded (FG) thick shell of revolution with variable thickness and curvature. The mentioned structure can be subjected to mechanical, electrical and magnetic fields. It was assumed that all m
Lat. Am. j. solids struct.. Publicado em: 2014
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19. Thermomechanical buckling oftemperature-dependent FGM beams
Buckling of beams made of functionally graded materials (FGM) under thermomechanical loading is analyzed herein. Properties of the constituents are considered to be functions of temperature and thickness coordinate. The derivation of the equations is based on the Timoshenko beam theory, where the effect of shear is included. It is assumed that the mechanical
Lat. Am. j. solids struct.. Publicado em: 2013-03
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20. 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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21. FUNCTIONALLY GRADED MATERIALS ON THE DYNAMIC BEHAVIOR OF FLEXIBLE RISERS / MATERIAIS COM GRADAÇÃO FUNCIONAL NO COMPORTAMENTO DINÂMICO DE LINHAS FLEXÍVEIS
Neste trabalho um novo elemento de viga co-rotacionado é apresentado para a análise não-linear geométrica tridimensional, estática e dinâmica, de linhas marítimas de Materiais com Gradação Funcional (MGF). Assume-se que o módulo de elasticidade e a massa específica do material da viga variam ao longo da espessura da seção transversal tubular de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/12/2011
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22. Uma estratégia numérica para análise termoelástica de sólidos recobertos com filmes de material funcionalmente gradado (FGM) / A strategy for numerical thermoelastic analysis of solid film coated with functionally grated material (FGM)
O método de elementos finitos tem sido tradicionalmente aplicado na solução de problemas de elasticidade e transferência de calor, sendo amplamente utilizado em casos com materiais homogêneos e isotrópicos. Com o advento de novas tecnologias tem sido mais freqüente a utilização de componentes com mais de um material, onde se procura obter o máximo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2011
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23. Otimização topológica de transdutores piezelétricos com gadação funcional de material: projeto, simulação, análise e fabricação. / Topology optimization of piezoelectric transducers considering functionally graded material: design, simulation, analysis and fabrication.
Piezoelectric materials generate displacements when they are excited by electrical potential and electrical potential when they are excited by force or pressure. These materials are widely applied in Precision Mechanics, Mechatronics, and Ultrasonic imaging areas. On the other hand, Functionally Graded Materials (FGM) are advanced materials, whose properties
Publicado em: 2010
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24. Otimização de topologia de estruturas e componentes / Topology optimizatin of sctructures and components
Topology optimization (TO) is an optimization technique that aims to help the designer in the phase of structural conception, seeking a better distribution of one fixed amount of material in a extended design domain. It combines a method of structural analysis with a mathematical programming (MP) algorithm. In this work, structural analysis is done by Finite
Publicado em: 2010