Influence of Dynamic Stiffness in Contact Region on Disk Brake Squeal

Oura, Yasunori; Kurita, Yutaka; Matsumura, Yuichi

doi:10.1299/kikaic.73.1985

Cited by 6 publications

(5 citation statements)

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“…Massi et al [20] developed an experimental set-up to investigate the mode lock-in phenomenon [6,15]. Oura et al designed a bench to investigate the influence of the contact stiffness on the brake squeal occurrence [7]. Figure 1 presents the simplified pin-on-disc architecture designed in this paper for the experimental set-up.…”

Section: Squeal Experimental Set-up 21 Presentation Of the Pin-on-discmentioning

confidence: 99%

“…It is important to bear in mind that the contact at the friction interface is not perfect and is a very complex tribological situation with non smooth surfaces, material transformation beneath the contact, third body layer of wear particles accumulation, etc. [5][6][7]. Recent works have shown that the evolution of the friction material, surfaces and tribolayer, with a braking sequence, could influence the activation of squeal occurrence [8].…”

Section: Introductionmentioning

confidence: 99%

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Experimental set-up and the associated model for squeal analysis

Duboc¹,

Magnier²,

Brunel³

et al. 2020

Mechanics & Industry

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Brake squeal is commonly defined at frequency upper than 1000 Hz and occurs if the system has a very high amplitude mechanical vibration with sound pressure level above 120 dB. Many studies are devoted to this problem and many of recent ones show that contact conditions and friction material behavior have a major influence on squeal occurrence. To investigate this aspect, an experimental set-up has been developed in this study. It is based on a simplified system in order to focus on the influence of the material in the one hand and surface conditions in the other hand. In this paper, the design of the pin-on-disc is described and an analytical model is also presented in order to understand the dynamic behavior of the system. Macroscopic aspects are investigated by varying the pin geometry. The results show clearly the influence of the variation of the contact length size on squeal occurrence. Comparison with the model shows good agreement and exhibit the necessity of considering an improved model of the friction material behavior. This study also gives information on the comprehension of squeal mechanisms.

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Section: Squeal Experimental Set-up 21 Presentation Of the Pin-on-discmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental set-up and the associated model for squeal analysis

Duboc¹,

Magnier²,

Brunel³

et al. 2020

Mechanics & Industry

View full text Add to dashboard Cite

show abstract

Section: Pendahuluanunclassified

“…Dengan tekanan pengereman yang bervariasi, maka akan mempengaruhi kekakuan antara kampas rem dan piringan rem (disc) di area kontak (kekakuan kontak), seperti yang dinyatakan oleh [6]. [6] melakukan penelitian tentang pengaruh kekakuan dinamis di daerah kontak pada rem cakram. Penelitian ini dilakukan dengan mesin tes squeal, yaitu dengan memberikan tekanan konstan dan gaya eksitasi pada kampas rem, kemudian dianalisis menggunakan surface contact analysis model.…”

Section: Pendahuluanunclassified

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Pengaruh bahan kampas rem terhadap respon getaran pada sistem rem cakram

Elhafid

Susilo

Widodo

2017

JTMI

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This study aims to determine the effect of brake pads material to the vibration response of disc brake system on many variety of braking conditions. The variations of brake pads material on this research such as metallic, non-asbes and ceramic. The variations of braking operation such as speed of disc rotation and braking pressure. Each brake pads material tested by variation of disc rotation 425, 637, 850, 1062 rpm and pressure variation 0,5 bar, 1 bar, 1,5 bar. Furthermore, the dynamic characteristics of brake pad had been tested by using the method of Modal Analysis Experiment. The results showed that the type of brake pad materials, disc rotation and braking pressure affect to vibration response of disc brake system. Increasing speed of disc rotation and braking pressure will increase the excitation force causing value amplitude of vibration in the braking system increases. Usage of brake pad ceramic also showed the lowest amplitude of vibration for all variations of disc rotation and braking pressure. Because the ceramic brake pad have the lowest natural frequency, then the value of the damping ratio is high, so that decreasing amplitude of vibration that occurs in the braking system.

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Influence of Pads' Surface Texture on Disk Brake Squeal

Nishizawa¹,

Kurita²,

Oura³

et al. 2012

Trans.JSME(C)

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Preventing brake squeal is a significant task in brake development because brake squeal bothers users, thereby reducing a vehicle's commercial value. Many researchers have tried to find the mechanisms that cause brake squeal, so the number of complaint to brake squeal is declining. However, brake squeal sometimes appears after a vehicle has been in use for years even though it was not generated early in the vehicle's life. In order to enable people to use vehicles for a long time with a high satisfaction level, it is important to find the factor that causes brake squeal to arise gradually because of specific changes; so we focused on the stiffness of brake pads, which are always wearing during braking, because the pads' stiffness correlates with brake squeal. This study presents the influence of pads' surface texture on disk brake squeal. Pads with different surface texture were prepared by changing the braking time and machining. We measured the pads' stiffness, which we evaluated by exciting a pad at the frequency and vibration amplitude that cause brake squeal. The measurement results show that pads' stiffness increases as their surface becomes smoother, which means that the surface stiffness of pad influences the pads' stiffness. Finally, we used a numerical model to analyze the generation of squeal, which is caused by pads' surface texture.

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Influence of Dynamic Stiffness in Contact Region on Disk Brake Squeal

Cited by 6 publications

References 0 publications

Experimental set-up and the associated model for squeal analysis

Experimental set-up and the associated model for squeal analysis

Pengaruh bahan kampas rem terhadap respon getaran pada sistem rem cakram

Influence of Pads' Surface Texture on Disk Brake Squeal

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