Disc Pad Physical Properties vs. Porosity: the Question of Compressibility as an Intrinsic Physical Property

Sriwiboon, Meechai; Tiempan, Nipon; Kaewlob, Kritsana; Rhee, Seong Kwan; Yuhas, D. E.

doi:10.4271/2017-01-2482

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…The time of flight for transmission through a brake pad is ~15 microseconds. Therefore, the baseline precision of the method is on the order of 0.6% [8]. In the manufacturing of brake pads the total time of flight is comprised of the transit-time through the steel backing, 𝑇𝑇𝑇𝑇𝑇𝑇 𝑠𝑠𝑤𝑤𝑤𝑤𝑤𝑤𝑠𝑠 as well as the transit time through the friction material, 𝑇𝑇𝑇𝑇𝑇𝑇 𝑓𝑓𝑚𝑚 as shown in Eq.…”

Section: Methodsmentioning

confidence: 99%

Development of a Cold-Pressing Process for the Production of Brake Pads with Uniform Density

Sukultanasorn

Sriwiboon

Saechin

et al. 2019

KEM

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This study aims to reduce brake pad thickness and density variations by pressure equalization in the preforming process. Brake pads consist of fillers, lubricants, abrasives, reinforcing fibers, and binders. These are compacted together as raw materials. Each component is responsible for a different specific property to help the brake pad reduce the speed of the vehicle. The forming of a brake pad begins with compression of friction powder in a rigid mold with a complicated contour. It is then compacted by vertically pressing punches to form a body of complicated shape and homogeneous density. The strength of the brake pad, which is a main property in the compacted material, primarily depends on the type of fiber reinforcing material. Since the ability of fiber to flow is poor due to its high internal friction and its random arrangement. These two characteristics cause non uniformity in density and elastic modulus. Pressure equalization is an adjustment of the filling depth of the powder which otherwise would have an uneven fill inf the cavity of the mold. The pressure equalization of the filled powder is shown to correlate with the brake pad dimensional accuracy and uniformity of density.

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Section: Methodsmentioning

confidence: 99%

Development of a Cold-Pressing Process for the Production of Brake Pads with Uniform Density

Sukultanasorn

Sriwiboon

Saechin

et al. 2019

KEM

Self Cite

View full text Add to dashboard Cite

show abstract

“…The effects of the main parameters such as the coefficient of friction and the attack angle are studied to understand their influences on the stability of the system. In fact, for a given formulation, disc pad porosity can affect friction, wear and squeal [3]. Based on customer's needs for noise-free brakes, car manufactures are increasingly installing damping kits in their braking systems.…”

Section: Automotive Brake Squealmentioning

confidence: 99%

Modal Coupling in Presence of Dry Friction

Simone

Guida

2018

Machines

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Abstract:In this paper, we analyze the behavior of a single pad system in the presence of dry friction. The goal is to investigate the path that leads a stable mechanical system to unstable behavior. In doing so, we studied the behavior of a discrete three DOF model, a continuous model and a finite element model of the pad. The numerical results are consistent with the experimental investigation conducted on a brake disk for railway application.

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Kinetics of Moisture Adsorption and Its Impact on Brake Pad Compression Modulus and Compressibility: Static Modulus of Compression vs. Dynamic Modulus of Compression vs. Hardness vs. Friction Coefficient

Rhee¹,

Rathee²,

Singh³

et al. 2022

SAE Technical Paper Series

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Disc Pad Physical Properties vs. Porosity: the Question of Compressibility as an Intrinsic Physical Property

Cited by 3 publications

References 4 publications

Development of a Cold-Pressing Process for the Production of Brake Pads with Uniform Density

Development of a Cold-Pressing Process for the Production of Brake Pads with Uniform Density

Modal Coupling in Presence of Dry Friction

Kinetics of Moisture Adsorption and Its Impact on Brake Pad Compression Modulus and Compressibility: Static Modulus of Compression vs. Dynamic Modulus of Compression vs. Hardness vs. Friction Coefficient

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