Reciprocating Motion
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Micro-CT evaluation of apical enlargement of molar root canals using rotary or reciprocating heat-treated NiTi instruments
Abstract Objective The aim of this study was to evaluate the root canal preparation and apical enlargement of molar root canals with rotary or reciprocating heat-treated nickel-titanium (NiTi) instruments, by using micro-computed tomography (micro-CT). Methodology Mesial root canals (n=48) of mandibular molars, with a curvature between 20° and 40°, wer
J. Appl. Oral Sci.. Publicado em: 12/08/2019
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2. Root canal preparation using micro-computed tomography analysis: a literature review
Abstract: This literature review has critically analyzed the published research related to the biomechanical preparation of root canals with three-dimensional analysis using micro-computed tomography (micro-CT). In December 2017, six databases (PubMed, Cochrane, Web of Science, Embase, Scopus, and Science Direct) were accessed using keywords to find articles
Braz. oral res.. Publicado em: 18/10/2018
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3. Análise da eficácia do instrumento RECIPROC #25 em atingir o forame apical sem glide path / Analysis of the effectiveness of the instrument RECIPROC #25 to achieve the foramen without glide path
The aim of the present studywas to evaluate the effectiveness of the Reciproc #25 instrument in reaching the apical foramen of mandibular molars root canals without any manual glide path. For this, a general sample of 300 mandibular molars was radiographed and graded accordantly the degree of curvature (Schneiders criteria) classes I and II. After applying t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/02/2012
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4. Modelling hermetic compressors using different constraint equations to accommodate multibody dynamics and hydrodynamic lubrication
In this work, the steps involved for the modelling of a reciprocating linear compressor are described in detail. The dynamics of the mechanical components are described with the help of multibody dynamics (rigid components) and finite elements method (flexible components). Some of the mechanical elements are supported by fluid film bearings, where the hydrod
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2009-03
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5. Influence of loading, contamination and additive on the wear of a metallic pair under rotating and reciprocating lubricated sliding
This paper deals with an experimental study of wear and friction responses from lubricated sliding. Tests were carried out using a tribometer having devices for both continuous and reciprocating motion. The tested specimens were pins of AISI 52100 steel and counter-faces of AISI 8640 steel. The lubricant was paraffin mineral oil, VI 100. The presence of addi
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2006-09
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6. Large eddy simulation applied to reciprocating compressors
This paper considers the application of large-eddy simulation (LES) to predict the performance of hermetic reciprocating compressors utilized in refrigeration. In such devices the pressure difference between the suction/discharge chamber and the cylinder, established by the piston motion, is responsible for the valve opening. Once the valves are open, the fl
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2006-06
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7. Non linear signal analysis applied to friction force identification in tribological tests / Identificação da força de atrito através de análise de sinais não lineares em ensaios tribológicos
When the surfaces of two elastic bodies present relative motions under certain amount of contact pressure the mechanical system can be instable. Experiments conducted on elastic bodies under friction forces shown that the dynamical system is self-excited by the non-linear behavior of frictional forces. The main objectives of this thesis are the study of the
Publicado em: 2005