Contact Elements
Mostrando 13-24 de 313 artigos, teses e dissertações.
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13. Numerical simulation of bolted connections
Abstract This article presents the modeling of a complete bolted connection based on a model with one bolt connecting two or three plates. Initially, the behavior of this model with one bolt is analyzed by comparing it with existing bibliography for 3 different types of applied load: tension, shear and a combination of these two. This model includes all nece
Lat. Am. j. solids struct.. Publicado em: 22/10/2018
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14. Study of Electric charge induction with a three-dimensional model using the finite elements method
Abstract One of the first subjects studied in Electricity and Magnetism classes is how one can make an electrically neutral object be an electrically charged object. There are three ways to do it: charging by friction, charging by contact and charging by induction. Induction charging is a method used to charge an object without actually touching the object t
Rev. Bras. Ensino Fís.. Publicado em: 30/07/2018
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15. Effect of blisters and rims on radial hydride precipitation in fuel elements under dry storage conditions
ABSTRACT Hydrogen enters in Zry clads during fuel element life in service; when hydrogen exceeds the terminal solid solubility, circumferential hydrides are precipitated. In the presence of thermal gradients, produced for instance by oxide spallation, localized concentration of hydrides - known as blisters - can be formed. Due to the fact that zirconium hydr
Matéria (Rio J.). Publicado em: 19/07/2018
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16. Oral implant osseointegration model in C57Bl/6 mice: microtomographic, histological, histomorphometric and molecular characterization
Abstract Despite the successful clinical application of titanium (Ti) as a biomaterial, the exact cellular and molecular mechanisms responsible for Ti osseointegration remains unclear, especially because of the limited methodological tools available in this field. Objective: In this study, we present a microscopic and molecular characterization of an oral i
J. Appl. Oral Sci.. Publicado em: 11/06/2018
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17. Numerical analysis of truss systems with stiffened flattened end-bars
Abstract Circular hollow sections are usually used in long-span roof truss systems. One of the typology for connecting elements in such structures involves the flattening of bar ends. This article presents the numerical analysis of a plane truss composed of circular hollow sections, in which diagonal bars have flattened ends. In this sense, a new flattening
Lat. Am. j. solids struct.. Publicado em: 03/05/2018
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18. The Rio Pardo salient, northern Araçuaí orogen: an example of a complex basin-controlled fold-thrust belt curve
ABSTRACT: The Rio Pardo salient, the large antitaxial curve described by the Araçuaí fold-and-thrust belt along the southeastern edge of the São Francisco craton, is one of the most prominent and one of the least studied features of the Brasiliano Araçuaí-West Congo orogenic system (AWCO). In addition to the Archean/Paleoproterozoic basement, the salien
Braz. J. Geol.. Publicado em: 2018-01
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19. ICP OES Determination of Contaminant Elements Leached from Food Packaging Films
ABSTRACT Determination of potential contaminants elements in food packing films arising from contact with acidic aqueous foods was undertaken by inductively coupled plasma optical emission spectrometry (ICP OES) in accordance with DIN EN 1186-1. Test sections from plastic films were totally immersed in 3% w/v CH3COOH used as the food simulant. Testing was c
Braz. arch. biol. technol.. Publicado em: 17/08/2017
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20. Yield Surfaces of Material Composed of Porous and Heterogeneous Microstructures Considering Phase Debonding
Abstract This work deals with numerical simulation of the mechanical behavior of materials composed of heterogeneous ductile microstructures using a multi-scale approach considering plasticity processes and phase debonding. Due to few studies about yield surfaces of metal matrix composites (MMC) with weak interfaces presented in the literature, the major goa
Lat. Am. j. solids struct.. Publicado em: 2017-08
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21. Blast Furnace Hearth Lining: Post Mortem Analysis
The main refractory lining of blast furnace hearth is composed by carbon blocks that operates in continuous contact with hot gases, liquid slag and hot metal, in temperatures above 1550 ºC for 24 hours a day. To fully understand the wear mechanism that acts in this refractory layer system it was performed a Post Mortem study during the last partial repair o
Mat. Res.. Publicado em: 15/05/2017
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22. Continuous Modeling Technique of Fiber Pullout from a Cement Matrix with Different Interface Mechanical Properties Using Finite Element Program
Abstract Fiber-matrix interface performance has a great influence on the mechanical properties of fiber reinforced composite. This influence is mainly presented during fiber pullout from the matrix. As fiber pullout process consists of fiber debonding stage and pullout stage which involve complex contact problem, numerical modeling is a best way to investiga
Lat. Am. j. solids struct.. Publicado em: 2016-10
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23. Physicochemical and Biological Investigation of Different Structures of Carbon Coatings Deposited onto Polyurethane
The aim of this study was to examine the thrombogenic properties of polyurethane that was surface modified with carbon coatings. Physicochemical properties of manufactured coatings were investigated using transmission electron microscopy (TEM), atomic force microscopy (AFM), X-ray Photoelectron Spectroscopy (XPS), Raman spectroscopy and contact angle measure
Braz. arch. biol. technol.. Publicado em: 26/02/2016
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24. Lexicología y fonología históricas del Aché
In this contribution nearly 200 lexical items of Aché, an understudied Tupi-Guarani language of Paraguay, are identified as of Tupi-Guarani (TG) origin and compared with their cognates in 20 other TG languages. The comparison not only shows that the lexicon of Aché is basically TG - no other linguistic elements have been identified until now -, but also al
Bol. Mus. Para. Emílio Goeldi. Ciênc. hum.. Publicado em: 2015-08