Effects of hard particles on friction coefficients and particle embedment in brake system during hard braking

Hamid, Mehdi; Stachowiak, Gwidon; Syahrullail, S.

doi:10.1063/1.4704303

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…This friction film act as coating agent and its thickness and morphology will influence the corrosion and removal rate of the oxide layer [9]. Nevertheless, there are few reports of the correlation between gray iron disc corrosion and brake performance [10,11]. Disc brakes using alternative materials, such as metal matrix composites, carbon-based composites, and ceramics matrix composites, have been developed as a substitute for gray iron discs.…”

Section: 10 Introductionmentioning

confidence: 99%

Burnishing Effect on Disc Brake Corrosion and Frictional Performance of Corroded Disk

et al. 2014

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This work examined the frictional force induced by the disc brake when the disc brake gets corroded. The corrosion process was carried out on two types of disc brake labelled disc A and disc B where both disc brakes were made from gray cast iron but having different design. Both discs were burnished with two types of friction materials labelled P-1 and P-2 before they were exposed to the open air environment to simulate the disc corrosion for a parked vehicle. The change in brake torque and friction coefficient was analyzed using a single-end brake dynamometer. The results showed that the burnishing effect of the friction material has significant effect on the formation of oxide layer. Oxide layer formed on disc burnished with friction material P-2 was more concentrated and thicker compared to the disc burnished with friction material P-1. Also, the results showed that brake torque and friction coefficient were closely dependent on the removal of the oxide layer and by the friction film on the burnished disc surface while applying the brake. Thus the composition of friction materials is critical to affect the formation of the oxide layer on the disc and consequently, the performance of the frictional force of disc brake system.

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Section: 10 Introductionmentioning

confidence: 99%

Burnishing Effect on Disc Brake Corrosion and Frictional Performance of Corroded Disk

et al. 2014

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External Hard Particle Size Effect on Changes in Frictional Performance and Grit Embedment during Drag and Stop Mode Braking

2014

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The effects of silica sand of 50-180 µm, 180-355 µm and 355-500 µm on friction performance and grit embedment at brake disc and pad interface was investigated. Results showed that present of external hard particles caused higher friction coefficient due to higher number of smaller particles involved in mixing and changing the effective contact, while good friction stability was attributed to smaller grit particles and compacted wear debris. Grit embedment was greatly dependent on presence of compacted wear debris as most grits were embedded into compacted wear debris with embedment of 0.8% was observed for 50-180 µm, 2% for 180-355 µm and 3% for 355-500 µm.

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Effect of Brake Pad Design On Friction and Wear with Hard Particle Present

et al. 2014

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Brake pad and disc design are important factors in ensuring excellent brake performance. But, particles from the environment can easily enter and interrupt the braking process and reduce braking performance. Friction depends on the design and surface properties of the pad and the disc. Wear happens in the brake system as the pad and disc try to withstand the braking force during the braking process. An experiment using brake dynamometer is done in order to determine the design effects on friction and wear when hard particle are present during the braking process. The test used three different brake pad designs under medium sliding load condition. It is found that Design 2 with a middle line groove provides better and stable brake torque and friction performance compared to Design 1 and Design 3. Design 2 also gavethe smallestweight loss inthe wear analysis of the pad.

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Effects of hard particles on friction coefficients and particle embedment in brake system during hard braking

Cited by 3 publications

References 16 publications

Burnishing Effect on Disc Brake Corrosion and Frictional Performance of Corroded Disk

Burnishing Effect on Disc Brake Corrosion and Frictional Performance of Corroded Disk

External Hard Particle Size Effect on Changes in Frictional Performance and Grit Embedment during Drag and Stop Mode Braking

Effect of Brake Pad Design On Friction and Wear with Hard Particle Present

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