Analytical Geometry
Mostrando 1-12 de 60 artigos, teses e dissertações.
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1. A MULTIPLE CRITERIA ANALYSIS OF FACTORS INFLUENCING SURFACE ROUGHNESS OF WOOD AND WOOD-BASED MATERIALS IN THE PLANING PROCESS
ABSTRACT This paper presents a study of the fuzzy analytical hierarchy process (FAHP) for the prioritization of factors having important effects on the surface roughness of wood and wood-based materials in the planing process. Firstly, a three-level hierarchical model was devised. Secondly, the FAHP method was employed to determine the weights of the factor
CERNE. Publicado em: 2020-03
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2. New nonlinear solution of nearly incompressible hyperelastic FGM cylindrical shells with arbitrary variable thickness and non-uniform pressure based on perturbation theory
Abstract In this paper, nonlinear analysis of thick cylindrical shells with arbitrary variable thickness made of hyperelastic FGM with radially variation of material properties in nearly incompressible state under non-uniform pressure loading is presented. Thickness and pressure of the shell vary in axial direction by linear and/or nonlinear functions. The g
Lat. Am. j. solids struct.. Publicado em: 28/10/2019
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3. SORM DG - an efficient SORM based on differential geometry
Abstract The first order reliability method (FORM) efficiently performs first order structural reliability analysis, but with limited accuracy. On the other hand, the traditional second order reliability method (SORM) was established to improve the results of FORM, but with a supplementary computational process. Proposed herein, is a new SORM, based on diffe
REM, Int. Eng. J.. Publicado em: 16/09/2019
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4. On the Free Vibration Analysis of Laminated Composite and Sandwich Plates: A Layerwise Finite Element Formulation
Abstract In this paper, a new higher-order layerwise finite element model, developed earlier by the present authors for the static analysis of laminated composite and sandwich plates, is extended to study the free vibration behavior of multilayer sandwich plates. In the present layerwise model, a first-order displacement field is assumed for the face sheets,
Lat. Am. j. solids struct.. Publicado em: 2017-12
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5. Tip Deflection Determination of a Barrel for the Effect of an Accelerating Projectile Before Firing Using Finite Element and Artificial Neural Network Combined Algorithm
Abstract For realistic applications, design and control engineers have limited modelling options in dealing with some vibration problems that hold many nonlinearity such as non-uniform geometry, variable velocity loadings, indefinite damping cases, etc. For these reasons numerous time consuming experimental studies at high costs must be done for determining
Lat. Am. j. solids struct.. Publicado em: 2016-10
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6. Simplified Analytical Approach to Evaluate the Nonlinear Dynamics of Elastic Cylindrical Shells Under Lateral Blast Loads
Abstract This paper presents an analytical solution to predict the nonlinear forced vibrations of elastic thin-walled cylindrical shells under suddenly applied loads. Interest in this problem is motivated by effects due to explosions on fluid-storage metal tanks. The model is based on the energy criterion due to Lagrange, in which the kinematic nonlinear rel
Lat. Am. j. solids struct.. Publicado em: 2016-07
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7. 2D upper bound analysis of ECAE through 2θ-dies for a range of channel angles
Equal Channel Angular Extrusion (ECAE), sometimes referred to as Equal Channel Angular Pressing (ECAP), is a Severe Plastic Deformation technique. However the energy-power parameters of ECAE have not been fully addressed in previous known publications. The present article is focused on the punching pressure, accumulated plastic strain, and dead metal zone ge
Mat. Res.. Publicado em: 26/10/2014
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8. Fundamentos da geometria complexa: aspectos geométricos, topológicos e analiticos. / Foundations of Complex Geometry: geometric, topological and analytic aspects.
The main goal of this work is to present a detailed study of the foundations of Complex Geometry, highlighting its geometric, topological and analytical aspects. Beginning with a preliminary material, such as the basic results on holomorphic functions in one or more variables and the definition and first examples of a complex manifold, we move on to an intro
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/05/2012
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9. Creep-age forming of AA7475 aluminum panels for aircraft lower wing skin application
Creep-age forming (CAF) is an interesting process for the airframe industry, as it is able to form or shape panels into smooth, but complex, curvatures. In the CAF process, the ageing cycle of the alloy is used to relax external loads imposed to the part, through creep mechanisms. Those relaxed stresses impose a new curvature to the part. At the end of the p
Materials Research. Publicado em: 17/07/2012
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10. APRENDIZAGEM SIGNIFICATIVA, EXPLORANDO ALGUNS CONCEITOS DE GEOMETRIA ANALITICA: Pontos e Retas
This work aims to research the contributions of the using of the investigation and exploitations tasks, with the usage of dynamic geometry software to a meaningful learning of some analytic geometry concepts, limiting itself to dots and lines. As theoretical references were used the ideas of João Pedro da Ponte (exploitation and investigative activities) an
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/06/2011
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11. Virtual boundary method applied to a problem of computational aerolastic analysis / Método da fronteira virtual aplicado em um problema de análise aeroelástica computacional
The behavior study of a profile of a typical aerolastic section, with Reynolds in range of micro aerial vehicle, is the main focus of this work, taking as objective the estimation of parameters of flutter phenomenon. The research analyzes of the flow of a incompressible fluid on a body (cylinder and airfoil profile) at steady state and oscillating with const
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/02/2011
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12. Solução analítica da aproximação Sn da equação de transporte para problemas de valor inicial e de contorno pela transformada dupla de Laplace / Analytical solution of approach SN of the equation of transport for problems of initial value and contour for the laplace double transformed
In this work a general analytical solution is reported, expressed in integral form for the time-dependent, one-dimensional SN transport equation in cartesian geometry valid for bounded and unbounded domain (0
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011