Comparative study of disc brake pads sold in Indian market — Impact on safety and environmental aspects

Sethupathi, P Baskara; Chandradass, J.; Balaji, S.

doi:10.1016/j.eti.2020.101245

Cited by 18 publications

(18 citation statements)

References 26 publications

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“…The shear strength (both hot and cold) were determined using ISO 6312 standards. 13 Porosity was determined as per JIS D 4418 to measure the void spaces in the material. The chase testing rig following SAE J661 was used to measure the normal and hot friction of the developed samples.…”

Section: Experimental Methodsmentioning

confidence: 99%

Synergic effect of metallic fillers as heat dissipaters in the tribological performance of a nonasbestos disk brake pad

Ahmed

Mohideen

Balaji

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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Brake friction linings are made of materials with a highly complex formulation that helps in improving the braking performance. The selection of friction materials with good physical, mechanical, and thermal properties is vital, which will decide the braking performance. Apart from giving good physio-mechanical properties, metallic fillers act as heat dissipaters. The objective of this work is to study the synergetic effect of prominent heat dissipaters, namely copper fibers, brass fibers, and zinc powders. Three simplified formulations were developed with 10, 14, and 18 wt.% of these heat dissipaters and named DB1, DB2, and DB3, respectively. It was observed that the addition of heat dissipaters increased the thermal properties. Tribological properties are tested based on SAE J661 standards. It was observed that DB2 had a consistent and higher coefficient of friction of 0.503 with a higher wear rate (7.6%) while DB3 had adequate μ and lower wear rate. The same batches of brake pads were tested in an inertia brake dynamometer following JASO C406 and a wear test was carried out. It was observed that % fade and % recovery were better for DB2 in both cycles. The wear rate in terms of thickness was lesser for DB2 followed by DB1 and DB3. The wear mechanism was analyzed using a scanning electron microscope. The preference selection index method of optimization was used to evaluate the overall performance parameters of the brake friction composites. Heat dissipaters with 14 wt.% have proved to be the better performers, followed by 10 and 18 wt.%.

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Section: Experimental Methodsmentioning

confidence: 99%

Synergic effect of metallic fillers as heat dissipaters in the tribological performance of a nonasbestos disk brake pad

Ahmed

Mohideen

Balaji

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Figure 2(a) show the fade 1 and fade 2 behaviors of brake pads with different solid lubricants. As can be noticed in the fade cycle, all the brake pads have an initial increase in µ because of the enhanced real area of contact (Baskara Sethupathi et al , 2020). This situation reaches a steady-state and then starts to decrease/fluctuate depending upon the ingredients in the formulation.…”

Section: Resultsmentioning

confidence: 95%

Comparative study of different solid lubricants towards friction stability in a non-asbestos disc brake pad

Sethupathi

Chandradass

2021

ILT

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Purpose This study aims to compare the influence of different solid lubricants on the friction stability of a non-asbestos disc brake pad. Design/methodology/approach Three brake pads were developed using three lubricants, namely, non-asbestos brake pad with sulfide mix (NASM), non-asbestos brake pad with bismuth sulfide (NABS) and non-asbestos brake pad with molybdenum disulfide (NAMO). Sulfide mix was indigenously developed by physically mixing friction modifiers, alkaline earth chemicals and various metallic sulfides homogeneously dispersed in graphite medium. The physical, chemical, mechanical and thermal properties of brake pads were characterized as per industrial standards. The tribological performances were studied using the Chase testing machine as SAE-J661-2012. The worn surface of the pads was studied using scanning electron microscope to analyze the dominating wear mechanism. Findings NASM was excellent in fade as well as wear resistance. NABS was better from a wear point of view, but fade resistance was moderate despite its higher cost. NAMO fared average in fade and wear despite its excellent dry lubricating properties. NASM was excellent in terms of fade as well as wear resistance. Originality/value Among the selected metal sulfides, the indigenously developed sulfide mix was better than the other two sulfides, which indicates that the synergetic effect of metal sulfides was always preferable to the individual sulfides.

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“…At the same time, it should also stop the vehicle at a desirable sliding distance when needed [6][7][8]. The CoF should lie between 0.3 and 0.5 for efficient braking [9][10][11]. Another condition for the brake material is that it should not wear out quickly.…”

Section: Introductionmentioning

confidence: 99%

Process Optimization of Automotive Brake Material in Dry Sliding Using Taguchi and ANOVA Techniques for Wear Control

et al. 2022

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In this paper, an investigation of the load-dependent wear behavior of copper-free semi-metallic brake material is presented. The experiments were conducted in ambient thermal settings with varying sliding velocities (3.141 m/s, 2.09 m/s, and 1.047 m/s), normal load (60 N, 50 N, and 40 N), and sliding distance (4500 m, 3000 m, and 1500 m). Taguchi’s method was used in designing experiments to examine the output through an L9 orthogonal array. ANOVA was used to identify the consequence of interactions among different constraints. It also established the significant contribution of each process factor. The objective was set as the ‘smaller is better’ criterion to find minimum wear conditions. The impact of the normal load on the wear process was found to be maximum (71.02%), followed by sliding velocity (27.84%) and sliding distance (1.14%). The optimum condition for the minimum wear rate was found at 40 N normal load, 1500 m sliding distance, and 3.14 m/s sliding velocity. The results were confirmed with validatory friction experiment runs. The resulting error was within 10% error, which verified the experiment methods. The SEM investigation of worn surfaces of pin and disc confirmed abrasive wear and adhesive wear at 60 N and 40 N, respectively.

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Comparative study of disc brake pads sold in Indian market — Impact on safety and environmental aspects

Cited by 18 publications

References 26 publications

Synergic effect of metallic fillers as heat dissipaters in the tribological performance of a nonasbestos disk brake pad

Synergic effect of metallic fillers as heat dissipaters in the tribological performance of a nonasbestos disk brake pad

Comparative study of different solid lubricants towards friction stability in a non-asbestos disc brake pad

Process Optimization of Automotive Brake Material in Dry Sliding Using Taguchi and ANOVA Techniques for Wear Control

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