Influence of disc topography on generation of brake squeal

Bergman, Filip; Eriksson, Mikael; Jacobson, Staffan

doi:10.1016/s0043-1648(99)00064-2

Cited by 112 publications

(50 citation statements)

References 8 publications

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“…Recurring temperature differences also lead to thermal fatigue which can result in the brake disc cracking [13]. Furthermore, these factors also cause vibration [14] and [15]. Accordingly, a brake disc should be able to absorb and dissipate heat effectively throughout repeated cycles of operating conditions.…”

Section: Introductionmentioning

confidence: 99%

A Study of Heat Transfer on Front and Back Vented Brake Disc Effect on Vibration

Lakkam

Puangcharoenchai

Suwantaroj

2017

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Abstract. The purpose of this study was to investigate the vibration characteristics of both front and back vented brake discs with physically different shapes. In accordance with theory, the heat transfer rates of the two types of brake disc were different and played an important role in deformation during usage. A dynamometer was used as an engineering tool for the experimental work, with boundary conditions according to the Japanese Automobile Standard JASO C406. One degree of freedom (DOF) acceleration signals on the brake calipers were analysed. Results indicated that the back vented brake disc reduced the vibration by up to 43.5% compared to the front vented brake disc with braking temperature at 200C, initial braking speed 50 km/h and hydraulic pressure of 4 MPa. Hydraulic pressure at 4 MPa generated the maximum vibration. Initial braking speed and braking temperature were also important factors.

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Section: Introductionmentioning

confidence: 99%

A Study of Heat Transfer on Front and Back Vented Brake Disc Effect on Vibration

Lakkam

Puangcharoenchai

Suwantaroj

2017

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“…De acordo com BERGMAN et al (1999) [3] a presença destes micro "buracos" sobre a superfície do disco diminui a área de contato, o que causa redução no coeficiente de atrito. Consequentemente, a temperatura final, a desaceleração e o momento da força aumentam utilizando-se um disco gasto, em função do aumento do coeficiente de atrito.…”

Section: Discussionunclassified

Avaliação do Desempenho Tribológico e Térmico de Materiais de Atrito Durante o Processo de Frenagem

et al. 2017

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RESUMONeste artigo, buscou-se verificar os parâmetros de operação de um sistema de freio a disco para motocicletas utilizando-se uma bancada de ensaios baseada no procedimento Krauss, descrita pela norma ABNT NBR 6143/1995 [1]. Optou-se por conduzir um Experimento Fatorial 2³, em que os três fatores de controle considerados (tipo de disco de freio, tipo de pastilha e o valor da pressão de acionamento da manete de freio) foram alterados deliberadamente em dois níveis cada. Buscou-se analisar as propriedades dos materiais envolvidos novos e após um determinado tempo de uso, denominado materiais assentados. Para avaliar o desempenho do sistema de freios durante o processo de frenagem, analisaram-se quatro variáveis de resposta simultaneamente: temperatura final, coeficiente de atrito, desaceleração e momento da força de frenagem. Foram utilizadas técnicas de Planejamento de Experimentos Fatoriais para analisar os dados coletados. Como resultado, o desempenho tribológico mais satisfatório aconteceu para os materiais constituintes do par de atrito, disco e pastilhas, assentados, e um maior valor de pressão de acionamento da manete de freio. Já para a temperatura, o melhor resultados ocorreu para os materiais do par de atrito novo e um menor valor de pressão. Por fim, foi proposta uma técnica de otimização com o intuito de encontrar a melhor combinação dos níveis de cada fator que otimize o desempenho global das múltiplas variáveis resposta. Palavras-chave: Material de atrito, Frenagem, Sistemas de Freio ABSTRACTIn this paper, we sought to verify the operating parameters of a disc brake system for motorcycles using a bench testing based on Krauss procedure described by the ABNT NBR 6143/1995 [1]. It was decided to conduct an experiment Factorial 2³, in which the three control factors considered (type of brake disc, type of chip and the value of the brake lever on working pressure) have changed on two levels each. It sought to analyze the properties of new materials involved, and after a certain time of use, called settlers materials. To evaluate the performance of the brake system during the braking process, we analyzed four response variables simultaneously: final temperature, coefficient of friction, deceleration time and braking force. Factorial Design of Experiments techniques were used to analyze the collected data. As a result, the most satisfactory tribological performance happened to the pair of materials constituting the friction disk and pads, setting, and an increased brake lever of the actuation pressure value. As for the temperature, best results occurred for the friction pair new materials with lower pressure. Finally, it proposed an optimization technique in order to find the best combination of the levels of each factor to optimize the overall performance of multivariable response

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“…In an earlier study, Bergman et al [13] showed that the number of contact spots when extrapolated from measurements over a small area was in excess of 100 000 over a typical brake pad rubbing surface. These plateaux of contact are essentially formed around localised sites where harder particles are located near the surface.…”

Section: Evaluation Of Friction Materials Performancementioning

confidence: 99%

Composite Materials for Automotive Braking Systems

Barton

2013

Advanced Composite Materials for Automotive Applications

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Influence of disc topography on generation of brake squeal

Cited by 112 publications

References 8 publications

A Study of Heat Transfer on Front and Back Vented Brake Disc Effect on Vibration

A Study of Heat Transfer on Front and Back Vented Brake Disc Effect on Vibration

Avaliação do Desempenho Tribológico e Térmico de Materiais de Atrito Durante o Processo de Frenagem

Composite Materials for Automotive Braking Systems

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