Bearings
Mostrando 1-12 de 99 artigos, teses e dissertações.
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1. Comparison of Wear Rate between Ceramic-on- Ceramic, Metal on Highly Cross-linked Polyethylene, and Metal-on-Metal Bearings
Resumo Objetivo Hoje, não há evidências sobre o acompanhamento em médio prazo da artroplastia total do quadril (ATQ) não cimentada com componentes de polietileno de alta ligação cruzada (highly cross-linked) sobre metal (MoP, na sigla em inglês), de cerâmica sobre cerâmica (CoC, na sigla em inglês), e de metal sobre metal (MoM, na sigla eminglê
Rev. bras. ortop.. Publicado em: 29/07/2019
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2. Study of the AISI 52100 Steel Reuse Through the Powder Metallurgy Route Using High Energy Ball Milling
The AISI 52100 is a tool steel used in industry to produce bearings. After the end of its life cycle, it is remelted or discarded in deposits. The powder metallurgy rises as an alternative to recycle this material without any waste. The steps used to produce the AISI 52100 steel by powder metallurgy included: Machining with speed of 45 rpm, high energy ball
Mat. Res.. Publicado em: 06/11/2017
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3. Campbell Diagrams of a Spinning Composite Shaft with Curvilinear Fibers
Abstract This paper presents the vibratory behavior of a spinning composite shaft with curvilinear fibers on rigid bearings in the case of free vibrations. A p-version of finite element is used to define the model. A theoretical study allows the establishment of the kinetic energy and the strain energy of the shaft, necessary to the result of the equations o
Lat. Am. j. solids struct.. Publicado em: 2017-03
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4. Modeling of Combined Impact and Blast Loading on Reinforced Concrete Slabs
Abstract Explosive devices represent a significant threat to military and civilian structures. Specific design procedures have to be followed to account for this and ensure buildings will have the capacity to resist the imposed pressures. Shrapnel can also be produced during explosions and the resulting impacts can weaken the structure, reducing its capacity
Lat. Am. j. solids struct.. Publicado em: 2016-12
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5. Experimental validation of a bearing wear model using the directional response of the rotor-bearing system
ABSTRACT The present work gives continuity in the analysis of the wear influence on cylindrical hydrodynamic bearings by presenting an experimental validation of the wear model previously proposed by the authors. This validation is carried on using the frequency response of the rotor-bearings system in directional coordinates. For this purpose, a test rig wa
An. Acad. Bras. Ciênc.. Publicado em: 10/11/2016
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6. Evaluation of the milling efficiency increase of AISI 52100 steel using niobium carbide addition through high energy ball milling
The AISI 52100 is a tool-type steel and is more often used in industry for the production of bearings. After the end of its life cycle, it is discarded or remelted, but both processes are considered expensive. Thus, the possibility of reusing this material through the powder metallurgy (PM) route is considered advantageous, since it transforms a waste into a
Rem: Rev. Esc. Minas. Publicado em: 2015-09
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7. Uncertainty analysis of a flexible rotor supported by fluid film bearings
AbstractThis paper is dedicated to the analyses of the effect of uncertain parameters on the dynamic behavior of a flexible rotor containing two rigid discs and supported by two fluid film bearings. A stochastic method has been extensively used to model uncertain parameters, i.e., the so-called Monte Carlo simulation. However, in the present contribution, th
Lat. Am. j. solids struct.. Publicado em: 2015-08
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8. Seismic Performance of Cable-sliding Modular Expansion Joints Subject to Near-fault Ground Motion
AbstractAccording to the research fruits of the diverse damages of bridge in the past, bearings' invalidation is the main reason of the damage of isolated bridges and causes oversized relative displacements between pier and girder. Eventually, it may lead to severe collision of superstructure. It is extremely dangerous when near-fault motion occurs, because
Lat. Am. j. solids struct.. Publicado em: 2015-07
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9. Dynamic analysis of a spinning functionally graded material shaft by the p - version of the finite element method
This paper is concerned with the dynamic behavior of the spinning Functionally Graded Material (FGM) shaft on rigid bearings. A p- version, hierarchical finite element is employed to define the model. A theoretical study allows the establishment of the kinetic energy and the strain energy of the shaft, necessary to the result of the equations of motion. In t
Lat. Am. j. solids struct.. Publicado em: 2014
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10. EstÃmulo mecÃnico na morfometria em mudas de Enterolobium contortisiliquum (Vell.) Morong / Mechanical stimulus as indicator of quality seedlings Enterolobium contortisiliquum (Vell.) Morong
This study aimed to quantify the effects induced by mechanical stimuli on the quality of seedlings Enterolobium contortisiliquum (Vell.) Morong. Treatments include five intensities of mechanical stimulation (0, 5, 10, 20 and 40 pushups) made daily for thirty days. The mechanical stimuli were initiated on December 20, 2011. Made by one-way passage of a struct
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/09/2012
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11. Desenvolvimento de um modelo termohidrodinâmico para análise em mancais segmentados / Development of a thermohydrodynamic model for analysis in tilting pad journal bearings
Este trabalho tem por objetivo analisar o comportamento termohidrodinâmico de mancais hidrodinâmicos segmentados e avaliar a influência da temperatura nas características dinâmicas (coeficiente equivalente de rigidez e de amortecimento) desses mancais. Por esse motivo, foi desenvolvido um modelo termohidrodinâmico para análise em mancais segmentados,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/07/2012
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12. Estudo da influência da força de corte em usinagem a verde nas propriedades mecânicas de cerâmicas sinterizadas / Influence of the cutting force of green machining on the mechanical properties of sintered ceramics
The present study deals with the measurement forces of green machining ceramics and their correlation with the mechanical properties after sintering. The green machining is employed in crude compacts either to check raw formats without compromising the extreme dimensional accuracy or to obtain a preform prior to finish machining after sintering, extensively
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/01/2012