Brake Disc
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Amorphization of Graphite Flakes in Gray Cast Iron Under Tribological Load
A gray cast iron disc, which had been submitted to a heavy duty automotive brake test, was examined with energy filtered transmission electron microscopy. A graphite flake in a convenient angular position showed the shear interaction of graphite layers with the iron matrix in nano-scale resolution. Atomic layers of graphite were wedged into the ferritic bulk
Mat. Res.. Publicado em: 28/05/2018
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2. Copper/Iron Brake Friction for Military Aircraft Application
ABSTRACT: The present study assesses the influence of non-metallic constituents and manufacturing parameters, such as compaction pressure and sintering temperature, to produce a metal matrix composite (MMC) of copper/iron, based on the brake disc of aircraft AT-29 SuperTucano. The samples were produced with six different compositions, by varying the amount o
J. Aerosp. Technol. Manag.. Publicado em: 03/05/2018
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3. Effect of Rockwool and Steel fiber on the Friction Performance of Brake Lining Materials
ABSTRACT Wear resistance and Frictional stability are key performance requirements for brake lining. Automotive brake linings are usually made of various ingredients such as binder, filler, friction modifiers and reinforcement. Rockwool is a mineral fiber and steel fiber is a metallic fiber. In this work reinforcement fibers used are both the mineral and met
Matéria (Rio J.). Publicado em: 2016-09
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4. Effects of material properties on generation of brake squeal noise using finite element method
AbstractThis research paper is concerned with the disc brake squeal problem for passenger cars. The aim of the present research is developing a finite element model of the disc brake assembly in order to improve understanding of the influence of Young's modulus on squeal generation. A detailed finite element model of the whole disc brake assembly that integr
Lat. Am. j. solids struct.. Publicado em: 2015-08
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5. 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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6. Análise da utilização de pirômetro infravermelho na medida de temperatura no disco de freio durante testes de frenagens / Analysis of the use of pyrometer to measure disc temperature during braking tests
Durante ensaios de materiais de fricção para uso em sistemas de freio automotivo, a temperatura do disco de freio é monitorada por meio de termopares acoplados lateralmente ao disco e logo abaixo da superfície de contato. Na atual pesquisa, realizou-se uma comparação entre a temperatura do disco medido por termopares e sensores infravermelhos durante t
Publicado em: 2011
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7. Estudo da relação entre DTV, BTV e BPV na vibração do tipo judder em sistemas de freio a disco / Study of the relationship between DTV, BTV and BPV over judder-type vibration in disc brake systems
Vibrações de baixa frequência, conhecidas por judder, figuram entre as maiores reclamações de consumidores para problemas originados pelos sistemas de freio automotivos, uma vez que penalizam o conforto do veículo. Em freios a disco, o judder procede de divergências dimensionais que resultem na variação da espessura do disco ao longo de sua circunfe
Publicado em: 2009
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8. Disc brake noise analysis using instability of complex eigenvalue / Instabilidade de freios a disco por analise de autovalor complexo
To understand, model and mitigate disc brake noise is still one of the greatest challenges for the automotive industry. It is substantially important for manufacturers and suppliers to predict the disc brake noise in a design phase. Squeal is a brake noise in the 1-15 kHz frequency range, and can be defined as a self-excited friction problem, which can gener
Publicado em: 2008
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9. Estudo de geração de trincas térmicas em discos de freios de veículos comerciais
The disc brake systems, when compared with the drum brake systems currently used in heavy-duty vehicles, resent significant advantages, such as: better performance in relation to temperature and speed and better braking comfort. On the other hand, the use of those systems submits the brake discs to much higher mechanical and thermal stress than that in brake
Publicado em: 2006
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10. The mechanism of changes in the surface layer of grey cast iron automotive brake disc
The aim of the study was to create a model, describing the run of tribological processes in the surface layer of grey cast iron automotive brake discs. Grey cast iron discs mating with non-asbestos organic brake pads were chosen for the investigations, as the most widely used materials in car brakes. Samples for surface analysis were prepared from disc opera
Materials Research. Publicado em: 2005-12
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11. Um estudo dos mecanismos de desgaste em disco de freio automotivo ventilado de ferro fundido cinzento perlítico com grafita lamelar. / A study of wear mechanim in automotive ventilated brake disc of gray cast iron.
Os principais mecanismos de desgaste, presentes em discos de freio ventilados automotivos, foram determinados utilizando ensaios de bancada em dinamometro inercial. Foram medidas a temperatura, rugosidade, taxa de desgaste, tensões residuais, coeficiente de atrito e desempenho de frenagem. Foi analisado o tribocontato através de técnicas de microscopia el
Publicado em: 2005
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12. Evaluation of the Brazilian brake pads performance / Avaliação do desempenho de pastilhas automobilisticas nacionais
Automotive brake systems are mainly friction based. The world tendency is toward using disc brakes instead of drum brakes, which are usually installed in the rear wheels. The increase in the performance of automotive vehicles and the changes in the dynamic characteristics have conducted to more efficient brake systems. The expansion of the brake pads market
Publicado em: 2005