Automotive simplex and duplex drum brake squeal analysis using the finite element method

Dias, Anderson Luiz; Rodrigues, Rômulo dN; Bezerra, Roberto dA; Lamary, Pierre

doi:10.1177/09574565211052692

Cited by 4 publications

(23 citation statements)

References 35 publications

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“…Considering the time of the event a total of 2 seconds, with an initial applied pressure of 4.27 MPa was applied to each back plate (Markers F on Figure 2). The results are shown in Figure 3, the right and left pads showed similar pressure distribution, essential for analysis validation, 2–5,10 also, points of no pressure can be seen on the pad, natural considering the disc ventilation holes. As seen by others works, the higher contact pressures (warm colors) happen near the edge in direction of the rotational movement, also, large blue parts, indicating low pressure, can be seen in the other end of the edge thanks to its singular pad geometry, it is also explained that this variating pressure distribution is evidence of instability that can generate squeal.…”

Section: Methodsmentioning

confidence: 72%

“…Then, aforementioned, the simulation of a static structural analysis for a brake disc is based on the occurrence of a stopping, where force is applied generating a friction contact of the pads on the disc (Figure 2), for this analysis, the disc was considered rotating with 79.37 rad/s (=20 km/h). For the eigenvalue and eigenvector extraction, the influences of the inertia and rigidity must be taken in account, 2–4,19 making the equation as follows:…”

Section: Methodsmentioning

confidence: 99%

“…As seen by others works, the higher contact pressures (warm colors) happen near the edge in direction of the rotational movement, also, large blue parts, indicating low pressure, can be seen in the other end of the edge thanks to its singular pad geometry, it is also explained that this variating pressure distribution is evidence of instability that can generate squeal. 2–4,20–22

Figure 3.Static structural analysis results of disc brake contact pressure.…”

Section: Methodsmentioning

confidence: 99%

“…It has been shown that this can even occur if the friction coefficient is constant. 2–4,14–16 It has also been demonstrated that the brake squeal occurs only when at least two of these events happen simultaneously. 2–5,10…”

Section: Introductionmentioning

confidence: 99%

“…2–4,14–16 It has also been demonstrated that the brake squeal occurs only when at least two of these events happen simultaneously. 2–5,10…”

Section: Introductionmentioning

confidence: 99%

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Parametric analysis on temperature influence on brake squeal generation in a single-seater off-road vehicle’s disc brake

Maciel,

Rodrigues,

Costa

et al. 2023

Noise & Vibration Worldwide

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Brakes are a critical component of automobiles, responsible for converting kinetic energy into heat and vibration. The phenomenon of brake squeal, which produces uncomfortable noises, has been extensively studied in both drum and disc brakes. Many studies have evaluated the influence of material and operational parameters on brake instability to reduce squeal. However, the effect of temperature, a key factor in brake performance, is often overlooked. This study aims to fill this gap by analyzing a single rear-axle disc brake from an off-road single-seater vehicle using a parametric approach. Two branches were developed in ANSYS software. The first branch consisted of a finite element model of the brake with disc, pads, and backplates. A static structural analysis was performed to simulate a real braking pressure situation, and the resulting pre-stress state was used to conduct complex modal analysis, which extracted eigenvalues and values responsible for stability. The second branch involved a transient thermal simulation before the static analysis, also considering a real braking situation, to create a gradient of temperature and change component pre-stress reactions accordingly. A design of experiments process was used to explore geometric, thermal, and operational variables. The results showed that temperature and its parameters (convection and emissivity coefficient) increase brake squeal. Thus, considering the effect of temperature is crucial when evaluating brake instability, and optimizing temperature control can help reduce brake squeal, improving safety and comfort for drivers and passengers.

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Section: Methodsmentioning

confidence: 72%

Section: Methodsmentioning

confidence: 99%

Figure 3.Static structural analysis results of disc brake contact pressure.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…2–4,14–16 It has also been demonstrated that the brake squeal occurs only when at least two of these events happen simultaneously. 2–5,10…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Parametric analysis on temperature influence on brake squeal generation in a single-seater off-road vehicle’s disc brake

Maciel,

Rodrigues,

Costa

et al. 2023

Noise & Vibration Worldwide

View full text Add to dashboard Cite

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Friction-induced noise in drum brakes: finite-element modeling and experiments with special focus on damping

2022

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Brake squeal in friction brakes is a typical audible noise phenomenon in vehicles leading to high development and sometimes warranty costs for the suppliers. The friction forces generated during braking are responsible for self-excited vibrations in the audible frequency range starting from $$1\hbox { kHz}$$ 1 kHz . In the past countermeasures against friction-induced vibrations are mostly investigated for disk brakes while the present study focuses on drum brakes. Damping is in the context of self-excited vibrations often one of the key measures. Nowadays recuperative braking in electric vehicles relieves the conventional friction brake. Due to safety reasons, electric vehicles need to possess at least a second independent brake system. Therefore, simpler drum brakes are on the rise again when developing brake systems. Compared to brake disks, where damping elements can hardly be implemented, the freely accessible drum surface and the brake shoes offer so far unused potential for applying passive damping measures. The present paper focuses on how damping measures influence the noise behavior of drum brakes. Industrial and non-industrial brake components are investigated in detail. Experimental as well as numerical procedures are used to assess damping and noise characteristics.

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Parametric analysis of the relationship between squeal and friction wear in motorcycle disc brakes

Albuquerque de Freitas,

Nascimento Rodrigues,

Santos Costa

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part J:

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Squeal is a noise problem that affects all types of automotive brake systems and may affect the health of the population living in heavy traffic areas. Parameters such as pressure, friction, and Young’s Modulus are crucial in determining brake noise generation. Notably, wear on rubbing surfaces emerges as a key contributor to squeal, affecting the overall brake system functionality and necessitating frequent maintenance and parts replacement. This study conducted a detailed analysis of the influence of material and operational factors on squeal generation, specifically examining their relationship with friction wear in motorcycle disc brakes. To achieve this goal, a parametric study was conducted using finite element analysis software ANSYS. Thus, the study involved subjecting the geometry to static and modal analyses to verify the generation of unstable modes. Additionally, two models were built to analyze the influence of wear on noise: one with Archard wear activated, which calculated the worn volume, and another with this option disabled. The results of the study suggest that wear is a crucial parameter that must be considered in numerical models, given its significant impact on stability attributes. Moreover, since material and operational parameters play a substantial role in generating squeal noise, this study provides valuable insights into the causes and effects of brake noise, offering practical recommendations for mitigating this common problem in motorcycle disc brakes. The model developed also serves as foundational framework for configuring simulations for similar systems, automotive or train disc brake, to study the noise and lifespan of pads.

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Automotive simplex and duplex drum brake squeal analysis using the finite element method

Cited by 4 publications

References 35 publications

Parametric analysis on temperature influence on brake squeal generation in a single-seater off-road vehicle’s disc brake

Parametric analysis on temperature influence on brake squeal generation in a single-seater off-road vehicle’s disc brake

Friction-induced noise in drum brakes: finite-element modeling and experiments with special focus on damping

Parametric analysis of the relationship between squeal and friction wear in motorcycle disc brakes

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