Electric Coupling
Mostrando 1-12 de 60 artigos, teses e dissertações.
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1. Modular modeling approach for FDM printed structures and piezo disks for metamaterial design
Abstract Research in metamaterials has recently gained interest in the field of noise and vibration control. The ability of creating band gap zones with minimum added mass is the main feature behind its success. In addition, the use of 3D printed parts, particularly the Fused Deposition Modeling (FDM), offers a practical solution for manufacturing parts with
Lat. Am. j. solids struct.. Publicado em: 12/08/2019
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2. A Study on Formation Process of Secondary Upsetting Defect in Electric Upsetting and Optimization of Processing Parameters Based on Multi-Field Coupling FEM
The electric upsetting process is an excellent electrically assisted preforming technique with electrical-thermal-mechanical multi-field coupling characteristic. The secondary upsetting defect in electric upsetting with inappropriate parameters combinations could result in folds in subsequent forging process. In order to analyze the formation process of the
Mat. Res.. Publicado em: 04/07/2016
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3. Optimal Placement of Piezoelectric Macro Fiber Composite Patches on Composite Plates for Vibration Suppression
AbstractThis work presents a new methodology for the parametric optimization of piezoelectric actuators installed in laminated composite structures, with the objective of controlling structural vibrations. Problem formulation is the optimum location of a Macro Fiber Composite (MFC) actuator patch by means the maximization of the controllability index. The co
Lat. Am. j. solids struct.. Publicado em: 2015-05
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4. APARATO ELETROQUÍMICO PARA SISTEMA DE AQUISIÇÃO DE DADOS MULTICANAL COM RESOLUÇÃO ESPAÇO-TEMPORAL
Spatiotemporal pattern formation in reaction-transport systems takes place spontaneously when the system is kept far from thermodynamic equilibrium. Targets, reaction fronts, waves, spirals, spots and stripes are some typical examples of selforganized structuring. In electrochemical systems, monitoring spatiotemporal patterns of potential in the solid/liquid
Quím. Nova. Publicado em: 2015-01
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5. An efficient coupled polynomial interpolation scheme to eliminate material-locking in the Euler-Bernoulli piezoelectric beam finite element
The convergence characteristic of the conventional two-noded Euler-Bernoulli piezoelectric beam finite element depends on the configuration of the beam cross-section. The element shows slower convergence for the asymmetric material distribution in the beam cross-section due to 'material-locking' caused by extension-bending coupling. Hence, the use of convent
Lat. Am. j. solids struct.. Publicado em: 2015-01
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6. Verificação do sincronismo do acoplamento elétrico entre circuitos simulando o comportamento de um sistema mecânico partícula em caixa / Timing verification of the coupling between electric circuits simulating the behavior of a particle in a box system mechanic
A dinâmica de sistemas caóticos é uma área de pesquisa relativamente recente, diretamente relacionada com os campos da engenharia, física e matemática aplicada. A sincronização entre sistemas dinâmicos tem sido um tópico de pesquisa muito freqüente, abrangendo campos desde a mecânica de corpos celestiais até a física dos lasers. Entretanto, a m
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/02/2012
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7. Effect of parametric uncertainties on the performance of a piezoelectric energy harvesting device
The use of piezoelectric materials for the development of electromechanical devices for the harvesting or scavenging of ambient vibrations has been extensively studied over the last decade. The energy conversion from mechanical (vibratory) to electrical energy is provided by the electromechanical coupling between mechanical strains/stresses and electric char
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012
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8. Transições de fase hádron-quark em estrelas de nêutrons
Recent advances on the field of high energy physics have enabled the study of matter under extreme conditions and, in this context, new states of matter are being discovered and speculated upon. Among these hypothetical states of matter is the one of deconfined quarks in high densities and/or temperatures. An environment with extreme densities and low temper
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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9. Estudo das ressonâncias de plasmon em filmes silicatos com nanopartículas de Ag interagentes
In this work, the behavior of surface plasmon resonance from layers of silver nanoparticles embedded in silicon dioxide or on surfaces of silicon dioxide was studied. Structural properties of the produced films were characterized by transmission electron microscopy, while the optical properties were studied with a spectrophotometer. Results showed average na
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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10. New concept of space radiator with variable emittance
A new concept of space radiator of variable emittance for satellite thermal control is presented. The radiator is composed of two stages which exchange heat through radiation between finned surfaces covered with variable emittance coatings, whose emissivity is increased with temperature. Under cold conditions the radiative heat coupling between the stages is
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-12
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11. Finite element analysis of actively controlled smart plate with patched actuators and sensors
The active vibration control of smart plate equipped with patched piezoelectric sensors and actuators is presented in this study. An equivalent single layer third order shear deformation theory is employed to model the kinematics of the plate and to obtain the shear strains. The governing equations of motion are derived using extended Hamilton's principle. L
Latin American Journal of Solids and Structures. Publicado em: 2010-09
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12. MODELOS DE CARGAS BASEADOS EM MEDIÇÕES PARA SIMULAÇÕES DINÂMICAS EM SISTEMAS ELÉTRICOS DE POTÊNCIA / MEASUREMENT-BASED LOAD MODELING FOR DYNAMIC SIMULATIONS ON ELECTRIC POWER SYSTEMS
This work describes a measurement-based load modeling methodology, using voltage and current data registered during power system disturbances. These load models are used on computational simulations for predicting power system stability after disturbances of system operational points. Practical results are presented of the proposed methodology, defining load
Publicado em: 2010