Complex Shapes
Mostrando 1-12 de 77 artigos, teses e dissertações.
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1. Discrimination of pores and cracks in iron ore pellets using deep learning neural networks
Abstract The discrimination between pores and cracks is an important step in the microstructural analysis of iron ore pellets. While the porosity is fundamental during the reduction process in blast furnaces, cracks are strongly detrimental to the mechanical strength. The usual image processing tools cannot automatically discriminate between these two types
REM, Int. Eng. J.. Publicado em: 2020-06
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2. 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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3. Simplified expressions for dynamic behavior of cylindrical shells uncoupled and coupled with liquids
Abstract The dynamic behavior of cylindrical shells is essential in many practical applications. These include in-vacuum and coupled vibrations of structures with contained fluids. Closed-form solutions are extremely complex since they involve many terms and algebraic operations that require numerical solvers. In this work, a simplified closed-form solution
Lat. Am. j. solids struct.. Publicado em: 22/07/2019
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4. Three-Dimensional Reciprocal Invisibility Cloak with Multilayered Structure
Abstract We investigate a three-dimensional (3D) reciprocal invisibility cloak with a multilayered structure based on coordinate transformation theory and complementary media. There has been considerable research on invisibility cloaks such as the external cloak, which requires complex “anti-objects”, and closed cloaks of different shapes, in which the o
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 19/06/2019
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5. Performance and Surface Integrity of Wire Electrical Discharge Machining of Thin Ti6al4v Plate Using Coated and Uncoated Wires
Wire Electrical Discharge Machining (WEDM) is one of the most important production technologies to manufacture very accurate small components and tools on any electrical conductive material. Titanium and its alloys have been widely used in automobile and aerospace industry as well as in medical engineering field. Small components and tools with complex geome
Mat. Res.. Publicado em: 03/06/2019
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6. Development of a Material for Manufacturing a Mold for Plastic Injection
Injection molding is a process used to manufacture high volumes of plastic containers of complex geometric shapes. Although CuBe has always been used, there are currently some alternative alloys such as the CuNiSiCr alloy that has lower manufacturing cost and similar properties. The objective of this paper is to characterize, by techniques of microscopy, the
Mat. Res.. Publicado em: 07/08/2017
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7. Analysis of speech and tongue motion in normal and post-glossectomy speaker using cine MRI
ABSTRACT Objective Since the tongue is the oral structure responsible for mastication, pronunciation, and swallowing functions, patients who undergo glossectomy can be affected in various aspects of these functions. The vowel /i/ uses the tongue shape, whereas /u/ uses tongue and lip shapes. The purpose of this study is to investigate the morphological chan
J. Appl. Oral Sci.. Publicado em: 2016-10
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8. AVALIAÇÃO DE PROPRIEDADES FÍSICAS E QUÍMICAS DE ELETRODEPÓSITOS DE Ni-W-P OBTIDOS EM CÉLULA DE HULL
Ni–W–P electrodeposits were synthesized in a Hull cell in order to simulate the obtainment under industrial conditions. Complete coverage of panels was accomplished by applying total currents of 1.0 and 2.0 A. Panels obtained with a current of 1.0 A appeared brighter. The best compositional uniformities, as determined by Energy Dispersive Spectrometer (E
Quím. Nova. Publicado em: 2015-12
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9. Large amplitude free vibration of orthotropic shallow shells of complex shapes with variable thickness
The present formulation of the analysed problem is based on Donell's nonlinear shallow shell theory, which adopts Kirchhoff's hypothesis. Transverse shear deformations and rotary inertia of a shell are neglected. According to this theory, the non-linear strain-displacement relations at the shell midsurface has been proposed. The validity and reliability of t
Lat. Am. j. solids struct.. Publicado em: 2013-01
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10. EXPERIMENTAL STUDY OF ELONGATED BUBBLES IN HORIZONTAL TWO-PHASE INTERMITTENT FLOW / ESTUDO EXPERIMENTAL DE BOLHAS ALONGADAS NO ESCOAMENTO BIFÁSICO HORIZONTAL INTERMITENTE
The present work experimentally studied several relevant dynamic characteristics of gas-liquid intermittent flow through a horizontal pipe. All tests were performed in a test section formed by 50.8 mm internal diameter pipe using air and water as working fluids. The tests covered a region where the flow undergoes a complex transition from elongated bubble fl
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/04/2012
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11. Influence of starch type on characteristics of porous 3Y-ZrO2 prepared from a direct consolidation casting method
Starch consolidation casting has been successfully used to produce porous ceramics with complex shapes at a relatively low producing cost. In this work, porous 3Y-ZrO2 ceramics were produced using two types of starch (corn and potato). Concentrated (50-52 vol. (%)) aqueous suspensions of the different 3Y-ZrO2-starch mixtures (i.e. starch to zirconia weight r
Materials Research. Publicado em: 01/04/2011
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12. Aspects on the optimization of die-sinking EDM of tungsten carbide-cobalt
At present, due to their properties, the tungsten carbide-cobalt (WC-Co) composite materials are in huge demand by industry to manufacture special tools, dies/molds and components under erosion. The powder metallurgy is the usual process applied to obtain WC-Co products, but in some cases this process is unable to produce tools of very complex shapes and hig
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-12