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Two higher order Zig-Zag theories for the accurate analysis of bending, vibration and buckling response of laminated plates by radial basis functions collocation and a unified formulation
No full textIn this article, we combine the Carreras Unified Formulation, CUF (Carrera E. Theories and Finite elements for multilayered plates and shells: A unified compact formulation with numerical assessment and benchmarking. Arch. Comput. Methods Eng., 2003; 10: 215-297.) and a radial basis function collocation technique for predicting the static deformations, free vibrations and buckling behavior of thin and thick cross-ply laminated plates. We develop by the CUF two Zig-Zag theories according to Murakamis Zig-Zag function. Both theories account for through-the-thickness deformations, allowing the analysis of thick plates. The accuracy and efficiency of this collocation technique for static, vibration, and buckling problems are demonstrated through numerical examples. © 2011 The Author(s)
Bending and vibration of laminated plates by a layerwise formulation and collocation with radial basis functions
No full textThis article addresses the static deformations and free vibration analysis of laminated composite and sandwich plates by collocation with radial basis functions, according to a layerwise formulation. The present layerwise approach accounts for through-the-thickness deformations. The equations of motion and the boundary conditions are obtained by the Carreras Unified Formulation, and further interpolated by collocation with radial basis functions. © 2013 Copyright Taylor and Francis Group, LLC
Analysis of thick isotropic and cross-ply laminated plates by radial basis functions and a Unified Formulation
No full textIn this paper, we combine Carrera's Unified Formulation and a radial basis function collocation technique for predicting the static deformations and free vibration behavior of thin and thick isotropic and cross-ply laminated plates. Through numerical experiments, the capability and efficiency of this collocation technique for static and vibration problems are demonstrated, and the numerical accuracy and convergence are thoughtfully examined. © 2010 Elsevier Ltd. All rights reserved
Radial Basis Functions collocation for the bending and free vibration analysis of laminated plates using the Reissner-Mixed Variational Theorem.
Full text linkIn this paper, we combine the Carrera's Unified Formulation CUF (E. Carrera. Theories and Finite elements for multilayered plates and shells: A unified compact formulation with numerical assessment and benchmarking. Arch. Comput. Meth. Eng., 10:215-297, 2003) and a radial basis function (RBF) collocation technique for predicting the static deformations and free vibrations behavior of thin and thick cross-ply laminated plates. For the first time, the Reissner-Mixed Variational Theorem is used together with the RBF collocation to achieve a highly accurate technique. The accuracy and efficiency of this collocation technique for static and vibration problems are demonstrated through numerical examples. © 2012 Published by Elsevier B.V. All rights reserved
Analysis of laminated plates by trigonometric theory, radial basis, and unified formulation
No full textA study using the radial basis function (RBF) collocation method to analyze static deformations, free vibrations, and buckling loads of square cross-ply laminated plates using a sinus-based shear and normal deformation theory is presented, allowing for through-the-thickness deformations. The principle of virtual displacements is used to obtain the equations of motions and boundary conditions and the governing equations in strong form for the RBF method are observed. A simply supported square laminated plate of side a and thickness h, composed of four equally layers oriented at [0/90/90/0°], is considered. It is found that the present mesh-less results are in very close agreement with the mesh-free results. The laminated plate is supported along the edges parallel to the x axis, while the other two edges may be simply supported (S) or clamped (C). An excellent agreement is achieved for all edge conditions when comparing the results obtained by the present RBF approach with those found earlier
Analysis of Thick Isotropic and Cross-PlyLaminated Plates by Radial Basis Functionsand Unified Formulation
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Analysis of sandwich plates by Radial Basis Functions collocation, according to Murakami's Zig-Zag theory
No full textIn this article, the static analysis of sandwich plates is performed by radial basis functions collocation, according to the Murakami's Zig-Zag function theory. The Murakami's Zig-Zag function theory accounts for through-the-thickness deformation, by considering a Zig-Zag evolution of the transverse displacement with the thickness coordinate. The equations of motion and the boundary conditions are obtained by the Carrera's unified formulation, and further interpolated by collocation with radial basis functions. © The Author(s) 2012 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav
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