Author
J. I. Barbosa
Other affiliations: Technical University of Lisbon, University of Lisbon, Instituto Superior Técnico
Bio: J. I. Barbosa is an academic researcher from Instituto Superior de Engenharia de Lisboa. The author has contributed to research in topics: Finite element method & Shell (structure). The author has an hindex of 9, co-authored 24 publications receiving 350 citations. Previous affiliations of J. I. Barbosa include Technical University of Lisbon & University of Lisbon.
Papers
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TL;DR: In this paper, a general formulation of the problem based on classical and shear deformation (the first-order as well as the third-order) theories is presented, and analytical solutions of the equations are developed for simply supported boundary conditions.
Abstract: Laminated composite beams containing magnetostrictive layers are modeled as distributed parameter systems and the magnetostrictive layers are used to control the vibration suppression. Velocity feedback with constant gain distributed controller is chosen to achieve vibration suppression. A general formulation of the problem based on classical and shear deformation (the first-order as well as the third-order) theories is presented, and analytical solutions of the equations are developed for simply supported boundary conditions. The effect of material properties, lamination scheme, and placement of the magnetostrictive layers on vibration suppression is investigated.
81 citations
TL;DR: In this article, a numerical method for the structural analysis of axisymmetric shells based on the high-order theory is presented, where a higher order displacement field is used with the longitudinal and circumferential components of the displacement given by power series of the transversal coordinate and the condition of zero stress in the top and bottom surfaces of the shell is imposed.
49 citations
TL;DR: In this paper, the static and free vibration behavior of functionally graded sandwich plate type structures, using B-spline finite strip element models based on different shear deformation theories, is studied.
47 citations
TL;DR: In this article, the dynamic instability response of variable stiffness composite plates, according to different material and geometrical parameters, is analyzed using the Rayleigh-Ritz method to perform buckling, free vibrations and dynamic instability analyses, using orthogonal polynomials.
39 citations
TL;DR: In this article, the authors consider the use of different shear deformation theories to formulate different layerwise models, implemented through kriging-based finite elements, and the viscoelastic material behaviour, associated to the sandwich core, is modelled using the complex approach and the dynamic problem is solved in the frequency domain.
34 citations
Cited by
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01 Jan 1997
TL;DR: This chapter introduces the finite element method (FEM) as a tool for solution of classical electromagnetic problems and discusses the main points in the application to electromagnetic design, including formulation and implementation.
Abstract: This chapter introduces the finite element method (FEM) as a tool for solution of classical electromagnetic problems. Although we discuss the main points in the application of the finite element method to electromagnetic design, including formulation and implementation, those who seek deeper understanding of the finite element method should consult some of the works listed in the bibliography section.
1,820 citations
Journal Article•
1,019 citations
TL;DR: A review of modern trends in theoretical developments, novel designs and modern applications of sandwich structures can be found in this paper, where the most recent literature published at the time of writing this review is considered, older sources are listed only on as-needed basis.
Abstract: The review outlines modern trends in theoretical developments, novel designs and modern applications of sandwich structures. The most recent work published at the time of writing of this review is considered, older sources are listed only on as-needed basis. The review begins with the discussion on the analytical models and methods of analysis of sandwich structures as well as representative problems utilizing or comparing these models. Novel designs of sandwich structures is further elucidated concentrating on miscellaneous cores, introduction of nanotubes and smart materials in the elements of a sandwich structure as well as using functionally graded designs. Examples of problems experienced by developers and designers of sandwich structures, including typical damage, response under miscellaneous loads, environmental effects and fire are considered. Sample applications of sandwich structures included in the review concentrate on aerospace, civil and marine engineering, electronics and biomedical areas. Finally, the authors suggest a list of areas where they envision a pressing need in further research.
412 citations
TL;DR: A review of the state-of-the-art in the area of dynamic analysis of composite shells can be found in this article, where the main aim is to provide a broad perspective of the current state of the art in this field.
364 citations
TL;DR: A review on the path towards delamination-free drilling for composite laminates can significantly help researchers improve currently available cost-effective drilling process and develop high performance drilling process as discussed by the authors.
265 citations