Development of copper-free eco-friendly brake-friction material using novel ingredients

Aranganathan, N.; Bijwe, Jayashree

doi:10.1016/j.wear.2016.01.023

Cited by 98 publications

(56 citation statements)

References 14 publications

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“…Frictional and wear resistance are the important parameters of the brake pad for better operation [1]. The brake pad generally consists of [13][14][15] ingredients that are used to satisfy the required frictional properties [2,3]. They are generally classified as binders, fillers, friction modifiers (abrasives and lubricants), and reinforcements.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Caryota urens fibers on physical, chemical, mechanical and tribological properties for brake pad applications

Krishnan¹,

Kumar²,

Babu

et al. 2019

Mater. Res. Express

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The idealization of this research work is to extend the utilization of the naturally available fibers as a key ingredient in the development of a non-asbestos free brake pad. The fibers used in this work are Caryota urens, which is found all over the Asian regions and abundantly available. The compression molding machine was used to develop the non-asbestos free brake pad. The fibers were added in weight percentages of 5, 10 and 15. The various physical, chemical, and mechanical properties were evaluated. Chase test rig was used to evaluate the tribological properties. The combination of Caryota urens fiber with the barytes had a more significant influence on the tribological properties. The brake pad composites with ten weight percent of Caryota urens fibers based brake pads possessed a good coefficient of friction values with less fade values and less fluctuations. Increasing the weight percentage of Caryota urens fibers in the brake pad formulation had a decreasing trend in the wear performance but increased recovery properties.

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Section: Introductionmentioning

confidence: 99%

Investigation of Caryota urens fibers on physical, chemical, mechanical and tribological properties for brake pad applications

Krishnan¹,

Kumar²,

Babu

et al. 2019

Mater. Res. Express

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“…where: x -value μ m obtained in the tests on the test stand, x z -value μ m determined from the model of multiple regression (relation (3)). …”

Section: Modeling Of the Variation Of The Coefficient Of Frictionmentioning

confidence: 99%

“…The work presents examples of uneven wear of friction linings such as higher wear on the outer radius of the disc relative to the inner radius of the disc, edge defects and cracking or tearing of the entire lining parts from the bearing plate. In this respect, works are underway on such a selection of the friction pair materials as to ensure a compromise among the costs of manufacturing (additional thermal and chemical processes when making the casts of the brake discs), the component wear and the friction mechanical properties of the friction pair, as described in [1,3,10,13,14,42]. On the other hand, [7,11,37] presents problems related to friction models and friction wear modeling of brake system components based on operational tests.…”

Section: Introductionmentioning

confidence: 99%

Analytical model coefficient of friction (COF ) of rail disc brake on the basis of multi-phase stationary tests

Sawczuk¹

2018

Eksploatacja i Niezawodność – Maintenance and Reliability

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Similarly to road vehicles, a disc brake remains the main friction brake in rail vehicles. Due to the increasing train speeds, a disc brake has already replaced the traditional clasp brake that is however, still used in cargo trains. In the process of long-term operation of the brake pad-brake disc friction pair, the parameters of the braking process such as the curve of the coefficient of friction are changed, which extends the braking distance. The paper presents the results of several years of investigations on the railway disc brake in different wear conditions in the aspect of the requirements set by the UIC (International Union of Railways) related to the brake pads approval for use.

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“…The rest of the article shows the increases in temperature (hot spots) on the brake disc during braking with organic pads. It should be pointed out that the phenomenon of hot spots is widely considered by many researchers who deal with the both brake systems and the friction clutches of the means of transport [1,2,5,8,16]. Number of papers presents the results of studies that allow to identify the phenomenon in respect of the location and number of hot spots on the brake disc [5,6].…”

Section: Fig 2 the Temperature Distribution On The Brake Disc Coopementioning

confidence: 99%

Identification of the hot spots phenomenon in brakes by using a thermal imaging camera

Sawczuk¹

2016

Proceedings of the 2016 International Conference on Quantitative InfraRed Thermography

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A long operation of the brake pads of the brake disc causes uneven wear of the friction surface. This applies both to the friction pads of organic material and from sintered metal. For larger braking power is the reason for overheating the blade, resulting in varying temperature distribution on the brake disc cooperating with the friction pad. The first study of this phenomenon has shown that it is highly speed-dependent braking. Therefore, it was observed during the train's braking from a speed of 300 km/h. At these speeds the brake disc there are known. Hot spots between which are areas with a substantially lower temperature. However, in areas of high temperatures it occurs following the formation of the protrusions due to the expansion of the target material. This phenomenon is further enhanced during each rotation of the disc, while on each bulge of material stresses acting on each surface of the friction pad. Occurring grooves on the facing (the space between the surfaces of friction) have proved insufficient to absorb the heat produced during braking. They take a small part of the thermal energy, which on the face have areas with different temperatures, 100 °C at the periphery of the disc 800 and 900 °C protrusions. This phenomenon is very complicated because it involves in addition to the properties of the material for brake discs presented and described dependency of the breaking function of temperature. Thus, many manufacturers brake disc determines the maximum mean temperature of the disc at 400 °C in cooperation with the organic friction pad and 550 °C in cooperation with the pad of sintered metal. Type of braking understood speed beginning of braking pressure to the brake disc pads and the mass of the slowdown and the strength properties of the target material impact on the number of hot spots on the disc, ie. The distance between hot spots. In order to eliminate the phenomenon, the manufacturers of friction pads modify the shape of the contact surface pads of brake discs to ensure even distribution of pressure on the dial. However, during the long service there is a phenomenon of laying a liner with respect to the brake disc, the reasons for the backlash in the mechanism of the brake lever which, due to wear of the brake disc itself. Then, in some cases, a phenomenon arises hotspots. Cladding without causing the phenomenon is facing divided into several friction elements hinged. This solution will ensure even distribution of the pressure of all the friction elements on the shield throughout the life of the pad. As a result, the brake disc does not tend to create "hot" areas that are the reason the formation of bulges in the material of the disc.The article presents the possibility of using the thermal imaging camera studies disc brakes in order to identify the phenomenon of hot spots. The results allow to evaluate the temperature distribution on the brake disc in which there is a tendency to create hot spots.

show abstract

Development of copper-free eco-friendly brake-friction material using novel ingredients

Cited by 98 publications

References 14 publications

Investigation of Caryota urens fibers on physical, chemical, mechanical and tribological properties for brake pad applications

Investigation of Caryota urens fibers on physical, chemical, mechanical and tribological properties for brake pad applications

Analytical model coefficient of friction (COF ) of rail disc brake on the basis of multi-phase stationary tests

Identification of the hot spots phenomenon in brakes by using a thermal imaging camera

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