Analysis of wear in organic and sintered friction materials used in small wind energy converters

Esswein, Jorge Alberto Lewis; Arrieche, Fabiano Edovirges; Schaeffer, Lírio

doi:10.1590/s1516-14392008000300007

Cited by 11 publications

(4 citation statements)

References 10 publications

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“…It is due to the good interfacial bonding during optimum sintering temperature that has given less porous structure in sintered part. In case of higher porosity of composite pad, the pores might be acted like an insulator inhibiting the heat dissipation 27 at interphase, which may cause a reduction in µ . Despite the different hardness of each material, the sintered material has proved to have a superior resistance to compression when compared to resin-based material.…”

Section: Resultsmentioning

confidence: 99%

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Comparative study of sintered and composite brake pad for wind turbine applications

Balaji

Katiyar

Eakambaram

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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The sintered brake pads have been the most commonly utilized brake pads in wind turbines, as it stalls the rotor after shutdown or in case of emergencies. It is a mixture of metallic particles that are pressed together. But it has been noticed that the friction at interface generates the spark in adverse conditions, which cause a fire in nacelle. Due to this a compact unit for fire suppression is used, which adds the additional cost in brake system. Therefore, it is necessary to address the spark issues coming from brake pads under adverse conditions through developing a brake pad using alternate route. Hence, a composite brake button was developed through a compression moulding route, that is, cost economic route. Despite the different compositions and manufacturing routes of materials, a similar frictional behaviour is observed after testing using friction test rig. Further, it is observed a marginally higher friction values for sintered pads. Moreover, the physical and mechanical properties like density, hardness, porosity, shear strength, compression strength, etc., are also found to be similar. In fact, the density of a composite pad is observed 34.7% lesser than sintered pad. Both the developed brake pads have a mean dynamic friction coefficient (∼0.4–0.5) with a mean static friction coefficient of approximately 0.45. In spite of more hardness, the wear resistance is found poorer in sintered pads as compared with composite pads. Hence, it can be concluded that the developed composite pad shows better tribomechanical performance and suitable for application without spark issues.

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Section: Resultsmentioning

confidence: 99%

“…However, the effect of sintered pad on mating part namely the disc was not considered. 6 Tongsri et al studied the behaviour of Cu-based friction materials with pre-alloyed bronze, iron and graphite and varying amount of SiC powders. The microstructure revealed non-homogeneity due to varying size of coarse Fe and SiC particles.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of sintered and composite brake pad for wind turbine applications

Balaji

Katiyar

Eakambaram

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Thus, it can lead to friction material matrix degradation and thereby lead to wear rise [146], and friction coefficient reduction [147]. Porosity can also keep the abrasive particles in the material, hence, prevents their loss during braking [148]. The surface porosity also allows wear debris to be stored during friction, before being evacuated out of contact [149].…”

Section: Prediction Of Microscopic Parameters: Prediction Of Porositymentioning

confidence: 99%

Braking performance of friction materials: a review of manufacturing process impact and future trends

Hentati

Makni

Elleuch

2023

Tribology - Materials, Surfaces & Interfaces

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The brake friction materials are composite materials with multi-ingredient systems which induce a complex formulation. This complexity is also the result of the manufacturing parameters effects, such as mixture sequence and duration, moulding pressure, time, temperature and heat treatment time. Therefore, heterogeneity is induced as well in the characteristics (microstructure, density, etc.) as in the behaviour (mechanical, tribological, dynamic, etc.). Despite the study of the effect of manufacturing parameters on the friction material behaviour, the synergistic effect between the heterogeneity and the braking performance is still not well reported. This paper strives to eliminate the cloud of uncertainty of the role of manufacturing parameters on the friction material performances by providing most used process of elaboration, and most required properties for contemporary brake system. Innovation in brake discs and pad manufacturing by optimized algorithms, prediction approaches, and 3D printing process is presented as innovative methods to improve braking materials performance.

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“…Tribo-testing of brake pad is equally a complex job because brake pad are used in various forms in various operating conditions. The friction materials on prototype are supposed to be evaluated as per globally accepted standards so that real potential of the material under various operating parameters can be evaluated before field test followed by commercialization [9,10]. Friction and wear are the key results for testing brake pad.…”

Section: Introductionmentioning

confidence: 99%

Pressure and temperature sensitivity analysis of palm fiber as a biobased reinforcement material in brake pad

Bernard¹,

Jayakumari

2018

J Braz. Soc. Mech. Sci. Eng.

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The effect of palm fiber on properties of automotive brake composite materials is analyzed. The test procedure followed is JASO C 406, which is for passenger car pads. Tribological properties of three brake pads (6 PF, 8 PF and 10 PF) were tested on full-scale inertia dynamometer for various performance parameters such as pressure-speed sensitivity (effectiveness studies) and Temperature sensitivity (fade and recovery behaviour). A pad undergoes all the testing parameters and maintains its low temperature rise in the disc for three pressure sensitivity and two temperature sensitivity tests. By increasing palm fiber content, hardness, heat swell and specific gravity increases, and also porosity and loss on ignition decreases. Test has been conducted using scanning electron microscope to analyse the all three specimens to evaluate the contact plateaus and wear debris during braking. 8% of palm fiber content in brake pad was found to be superior to 6 PF and 10 PF in most of the important tribological properties.

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Analysis of wear in organic and sintered friction materials used in small wind energy converters

Cited by 11 publications

References 10 publications

Comparative study of sintered and composite brake pad for wind turbine applications

Comparative study of sintered and composite brake pad for wind turbine applications

Braking performance of friction materials: a review of manufacturing process impact and future trends

Pressure and temperature sensitivity analysis of palm fiber as a biobased reinforcement material in brake pad

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