Sliding Contact
Mostrando 1-12 de 34 artigos, teses e dissertações.
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1. Avaliação tribológica de óleos hidráulicos biodegradável e mineral com deslizamento entre as ligas de Cu-Zn e WC-CoCr
RESUMO A correta seleção dos óleos lubrificantes e das superfícies de contato melhoram o desempenho e reduzem o consumo de energia das máquinas Por isso, a engenharia de superfícies propõe novos revestimentos aos quais seu comportamento tribológico combinado com o uso de óleos biodegradáveis em componentes de sistema hidráulicos, não são conheci
Matéria (Rio J.). Publicado em: 25/11/2019
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2. Reinforced Glass-ceramics: Parametric Inspection of Three-Dimensional Wear and Volumetric Loss after Chewing Simulation
Resumo O objetivo deste estudo foi investigar o desgaste tridimensional, perda volumétrica e rugosidade após a simulação de mastigação de dois materiais vitro-cerâmicos. Discos de dissilicato de lítio (LD, Emax CAD, Ivoclar) e silicato de lítio reforçado com zircônia (ZLS, Vita Suprinity, Vita Zhanfabrick) (n=20/g) foram confeccionados e digitaliz
Braz. Dent. J.. Publicado em: 07/10/2019
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3. Superhydrophobic silicon fabricated by phosphomolybdic acid-assisted electrochemical etching
Controllable geometry silicon surfaces with superhydrophobicity are difficult to be fabricated without photolithography techniques. Superhydrophobic silicon surfaces with water contact angle larger than 150º and sliding angle less than 10º have been successfully fabricated by electrochemical etching strategy. Squarelike hole arrays with controllable geomet
Quím. Nova. Publicado em: 26/08/2019
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4. Integrated Experimental Approach for Alloying of Surface Layer Ti6Al4V+B4C Metal Matrix Composites using Laser Treatment
Surface engineering applications have brought the titanium and its alloys into the limelight in the manufacturing industries such as the aerospace, automobile, marine, chemical processing industry, nuclear power and biomedical. Despite the growths experienced in the use of this material, it is plagued with poor wear behaviour, especially when in contact with
Mat. Res.. Publicado em: 17/01/2019
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5. Investigation on Friction and Wear Properties of High-Temperature Bearing Steel 9Cr18Mo
This paper presented a study of friction and wear on 9Cr18Mo when rubbed against other materials (steel-304, steel-440C, steel-GCr15 or silicon nitride ceramic ball) at high temperature conditions. Friction and wear tests were carried out with universal a friction and wear testing machine. The wear morphology was analyzed by a Nanovea three-dimensional profi
Mat. Res.. Publicado em: 05/04/2018
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6. Correlation Between Fuel Lubricity and Vibration Signals Obtained in Ball-disc Analysis Using Fourier Transform
During the contact between metallic surfaces in mechanical systems, some dynamic characteristics present significant changes as the vibration signal patterns. The acquisition and characterization of these signals, by the use of Fourier Transform (FT), are non-intrusive tools in the evaluation of lubricity. This study aimed to evaluate dynamically the fuels l
Mat. Res.. Publicado em: 24/11/2015
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7. Numerical investigation of sliding frictional contact in functionally graded steels (FGS)
This study will analyze the two-dimensional nonlinear partial slip contact problem between a graded half plane in the normal to the contact interface and a rigid flat punch subject to a normal load. The problem, formulated under plane strain conditions, is reduced to singular integral equations of the second kind that are then solved with an expansion - coll
Mat. Res.. Publicado em: 2014-12
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8. Sliding frame-solid interaction using BEM/FEM coupling
In this work it is presented a coupling between the Boundary Element Method (BEM) and the Finite Element Method (FEM) for two-dimensional elastostatic analysis of frame-solid interaction. The BEM is used to model the matrix while the reinforcement is modeled by the FEM. Regarding the coupling formulation a third degree polynomial is adopted to describe the d
Lat. Am. j. solids struct.. Publicado em: 2014-12
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9. Estudo da relação entre propriedades de compósitos de fricção aplicados a sistemas de freio a disco e a propensão à ocorrência de Squeal Noise
Automotive brake systems are very often susceptible to generate high frequency noise as a result of a self excited vibration. This phenomenon is generically nominated brake squeal noise and is the subject of many studies which intend to identify and describe its exciting mechanism and to propose counter measures to avoid its occurrence. One key subject yet t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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10. Estudo do desgaste e atrito em ensaios micro-abrasivos por esfera rotativa fixa em condições de força normal constante e pressão constante. / Wear and friction study in micro-abrasive wear testing by rotative fixed ball under conditions of constant normal force and constant pressure.
The micro-scale abrasive wear test by rotative ball has gained large acceptance in universities and research centers, being widely used in studies on the abrasive wear of materials. Two wear modes are usually observed in this type of test: rolling abrasion results when the abrasive particles roll on the surface of the tested specimen, while grooving abrasion
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/06/2011
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11. Análise dinâmica de rolamentos de esfera / Dynamic analysis of ball bearing
Ball bearings are simple machine elements but largely used in several applications involving high velocities, high temperatures and different loads. The load model is fundamental for the ball bearing s dynamic and for this reason it is necessary to define with accuracy the mechanisms performance using analytical methods. The objective of this thesis is to an
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/08/2010
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12. A new technique for mandibular osteotomy
Sagittal split osteotomy (SSO) is a surgical technique largely employed for mandibular mobilizations in orthognatic procedures. However, the traditional design of buccal osteotomy, located at the junction of mandibular ramus and body, may prevent more extensive sliding between the bone segments, particularly on the advance, laterality and verticality of the
Publicado em: 2010