Free Form Deformation
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Free Vibration of flexible soft-core sandwiches according to layerwise theories differently accounting for the transverse normal deformability
Abstract This study aims to generalize a previously developed accurate and inexpensive 3-D zig-zag theory up to an arbitrary representation form and to determine which simplifications are yet accurate in determining transverse shear and normal stress/deformation effects on vibrations of soft-core sandwiches with not moving middle/neutral plane (pumping). Nat
Lat. Am. j. solids struct.. Publicado em: 28/10/2019
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2. A New Fifth-Order Shear and Normal Deformation Theory for Static Bending and Elastic Buckling of P-FGM Beams
Abstract A new fifth-order shear and normal deformation theory (FOSNDT) is developed for the static bending and elastic buckling analysis of functionally graded beams. The properties of functionally graded material are assumed to vary through the thickness direction according to power-law distribution (P-FGM). The most important feature of the present theory
Lat. Am. j. solids struct.. Publicado em: 2017
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3. An Explicit Stiffness Matrix for Parabolic Beam Element
Abstract This study is devoted to strain-based formulation for a curved beam. Arches with parabolic geometry, which have a variety of applications, belong to this structural type. Dependency of the curvature radius to the arch length creates some complexities in the solution process. To analyze these complex structures, a two-node beam with six degrees of fr
Lat. Am. j. solids struct.. Publicado em: 2016-09
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4. Bending, Vibration and Buckling of Laminated Composite Plates Using a Simple Four Variable Plate Theory
Abstract In the present study, a simple trigonometric shear deformation theory is applied for the bending, buckling and free vibration of cross-ply laminated composite plates. The theory involves four unknown variables which are five in first order shear deformation theory or any other higher order theories. The in-plane displacement field uses sinusoidal fu
Lat. Am. j. solids struct.. Publicado em: 2016-03
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5. Free Vibration of Laminated Composite Plate with Shape Memory Alloy Fibers
Abstract In the present study, an analytical closed form solution for free vibration response of hybrid composite plate reinforced with shape memory alloy (SMA) fibers is derived. Recovery stresses generated during martensitic phase transformation are obtained based on one- dimensional Brinson's model. The mechanical properties of plate are assumed to be tem
Lat. Am. j. solids struct.. Publicado em: 2016-02
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6. 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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7. Free vibration response of a multilayer smart hybrid composite plate with embedded SMA wires
In this paper, free vibration response of a hybrid composite plate was studied. Effects of some geometrical, physical and material parameters on response of the composite plates embedded with shape memory alloy (SMA) wires were investigated, which have not been reported in the literature thus far. Some of these parameters included important factors affecting
Lat. Am. j. solids struct.. Publicado em: 2014-03
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8. Flexural analysis of cross-ply laminated beams using layerwise trigonometric shear deformation theory
In the present work, a layerwise trigonometric shear deformation theory is used for the analysis of two layered (90/0) cross ply laminated simply supported and fixed beams subjected to sinusoidal load. The displacement field of the present theory consists of trigonometric sine function in terms of thickness coordinate to take into account the effect of trans
Lat. Am. j. solids struct.. Publicado em: 2013-07
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9. Otimização de forma de cascas via deformação livre de forma baseado em NURBS / Shape optimization of shell via free-form deformation NURBSbased
Neste trabalho buscou-se consolidar a união entre três áreas do conhecimento: a parametrização de curvas e superfícies do tipo B-spline racionais não-uniformes (NURBS), a otimização matemática e a análise estrutural por elementos finitos. A união destas três áreas é realizada neste trabalho através da otimização de formas de cascas, devido
Publicado em: 2010
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10. SASSI 2000 AND ACS SASSI 2.2 OVERVIEW ON STRUCTURESOIL-STRUCTURE INTERACTION ANALYSIS / PANORAMA DA INTERAÇÃO ESTRUTURA-SOLO-ESTRUTURA SEGUNDO O SASSI 2000 E SUA PROJEÇÃO NO ACS SASSI 2.2
Situations involving structure-soil-structure interaction using SASSI 2000 and ACS SASSI protocols are concerned. Initially, techniques of elastic plane waves propagation in solids are used to understand SASSI free-field solution algorithm. Then, in SASSI scenery, some relevant properties of the model are varied and their influence on the interaction is anal
Publicado em: 2008
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11. Modelagem computacional de estruturas anatômicas em 3D e simulação de suas imagens radiográficas / Computational 3D modelling of anatomic structures and simulation of its radiography images
The conventional methods of quality control applied to radio diagnosis are the best way to have assured good quality of the produced images. Due the amount of variables to consider, the study of particular issues of the process of formation of radiological images requires complementary computational tools. However, the computational voxel based phantoms are
Publicado em: 2008
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12. Cálculo da elasticidade de cristais líquidos nemáticos através de métodos da geometria diferencial
Found on Frank free energy relation, the bulk elastic constants of the nematic liquid crystals are computed in this work through an approach based on the affine connection method. This consists in the deformation of the isotropic fluid sferical molecules until they acquire an elipsoidal shape, likely the estimated nematic molecules form. Herewith the method
Publicado em: 2007