Analysis of High Damping Underlayer Materials for Brake Pads and its Effects on NVH Performance

Matozo, Luciano Tedesco; Menetrier, Ademir R.; Tamagna, Alberto

doi:10.4271/2006-01-3223

Cited by 10 publications

(3 citation statements)

References 4 publications

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“…Sometimes an additional layer of material, called under layer or substrate, is placed between the friction material and the back plate as shown in Figure 12. Its main purpose is to damp vibrations originating at the disc-pad interface [12,13,14].…”

Section: Under Layermentioning

confidence: 99%

Failure of Friction Brake Pad Against Rapid Braking and It’s Life Enhancement

KUSHWAHA,

JAIN,

MISHRA

2023

IJSREM

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This Disc brake have evolved to be a reliable method of decelerating and stopping a vehicle. There have been different designs of disc brake systems for different applications. This review describes different aspects of the components and the materials used in a disc brake system. Despite all the improvements, there are still many operational issues related to disc brakes that need to be understood in greater detail and resolved. The basic principle used in braking systems is to convert the kinetic energy of a vehicle into some other form of energy. During a braking operation not all the kinetic energy is converted into the desired form, some energy might be dissipated in the form of heat and vibrations. Graphene is still a very new material, especially in friction brake compounds. Due to its unique properties and years of testing, we were able to develop a friction material like no other. In the automotive industry, where every major car maker has already filed several patent applications for friction compounds containing graphene, it's clear to see that it is the future of braking pads. New regulations which start from 2025 will prohibit the use of copper powder in disc pads. Graphene is not only an excellent substitute for copper, but a major upgrade in terms of performance. Key Words: Friction Brakes, Disc Brakes, Braking Systems, Brake pads, Heat Transfer, Heat Management, Wear Testing , Wear modeling, Material Doping, Pin on Disc, etc.

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Section: Under Layermentioning

confidence: 99%

Failure of Friction Brake Pad Against Rapid Braking and It’s Life Enhancement

KUSHWAHA,

JAIN,

MISHRA

2023

IJSREM

View full text Add to dashboard Cite

show abstract

“…The extra material layer is often placed between a back plate and friction material, called the under layer or base. Its primary objective is to dampen vibrations coming from the interface of the disc-pad [28].…”

Section: Under Layermentioning

confidence: 99%

Automotive Disc Brake and Its Numerical Analysis: A Literature Review

Jawarkar¹,

Awari²,

Trikal³

2020

IJIES

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The most significant feature of the car that ensures security and comfort is the brake. Over time, disc brakes have grown to be compatible to decelerate and stop the car. This is the most important aspect of the vehicle that is often showing the nonlinear thermo elastic transient conditions. For numerous uses, there are various prototypes of disc brake systems. A comprehensive overview of the different geometries of the components and numerical analysis of solid disc is given in this study. So many disc brakes related operating problems need to be understood by considering all the changes. Substantial studies on these challenges have been carried out and are continuing, and various approaches are being suggested to remove or minimize them at the same time. This research would be useful in explaining brake system changes and efficiency, in increased fuel consumption, and in reducing the weight of vehicles. And the products used in previous experiments and the use of various synthetic materials are also discussed. The analysis shows that, by actually emulating all the applicable realistic scenarios, there is ample space for extended research to realize optimum disc brake system architecture.

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“…the effective Young's modulus of the whole pad assembly (brake pad-adhesive layer-backing plate). Other approaches have also been presented as well in the literature [4], based on the measurement of the pad damping ratio and the estimation of its effective Young's modulus from the resonance frequency by means of contact sensors (standard accelerometers). However, the paper by Matozo et al does not focus on quality control of the pad assembly in terms of structural integrity but puts the attention on the influences of its mechanical properties (damping ratio and effective Young's modulus) on noise occurrence.…”

Section: Introductionmentioning

confidence: 99%

Diagnostic procedure on brake pad assembly based on Young's modulus estimation

Chiariotti

Martarelli

Santolini

et al. 2013

Meas. Sci. Technol.

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Quality control of brake pads is an important issue, since the pad is a key component of the braking system. Typical damage of a brake pad assembly is the pad–backing plate detachment that affects and modifies the mechanical properties of the whole system. The most sensitive parameter to the damage is the effective Young's modulus, since the damage induces a decrease of the pad assembly stiffness and therefore of its effective Young's modulus: indeed its variation could be used for diagnostic purposes. The effective Young's modulus can be estimated from the first bending resonance frequency identified from the frequency response function measured on the pad assembly. Two kinds of excitation methods, i.e. conventional impulse excitation and magnetic actuation, will be presented and two different measurement sensors, e.g. laser Doppler vibrometer and microphone, analyzed. The robustness of the effective Young's modulus as a diagnostic feature will be demonstrated in comparison to the first bending resonance frequency, which is more sensitive to geometrical dimensions. Variability in the sample dimension, in fact, will induce a variation of the resonance frequency which could be mistaken for damage. The diagnostic approach has been applied to a set of undamaged and damaged pad assemblies showing good performance in terms of damage identification. The environmental temperature can be an important interfering input for the diagnostic procedure, since it influences the effective Young's modulus of the assembly. For that reason, a test at different temperatures in the range between 15 °C and 30 °C has been performed, evidencing that damage identification technique is efficient at any temperature. The robustness of the Young's modulus as a diagnostic feature with respect to damping is also presented.

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Analysis of High Damping Underlayer Materials for Brake Pads and its Effects on NVH Performance

Cited by 10 publications

References 4 publications

Failure of Friction Brake Pad Against Rapid Braking and It’s Life Enhancement

Failure of Friction Brake Pad Against Rapid Braking and It’s Life Enhancement

Automotive Disc Brake and Its Numerical Analysis: A Literature Review

Diagnostic procedure on brake pad assembly based on Young's modulus estimation

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