Experimental characterization of frictional behaviour of clutch facings using Pin-on-disk machine

Bezzazi, Mohammed; Khamlichi, Abdellatif; Jabbouri, Abdallah; Reis, Pedro; Davim, J. Paulo

doi:10.1016/j.matdes.2006.07.001

Cited by 46 publications

(28 citation statements)

References 4 publications

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“…This is often better represented by friction disc test rigs as set out in SAE J661a. Marklund and Larsson [17] and Bezzazi et al [18] showed good comparison between pin-on-disc and friction disc test rig frictional characteristics for clutch lining materials.…”

Section: Introductionmentioning

confidence: 96%

Effect of clutch lining frictional characteristics on take-up judder

Gkinis

Rahmani

Rahnejat

2017

Proceedings of the Institution of Mechanical Engineers, Part K:

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Take-up judder is the first rigid body torsional mode of the clutch system, which occurs during clutch engagement. This phenomenon is induced by stick-slip oscillations at the friction lining interfaces between the clutch disc and flywheel, and the pressure plate. The phenomenon is influenced by the clutch lining friction characteristics, the topography of the mating-sliding surfaces and the operational conditions during the engagement process. Therefore, the interfacial characteristics are affected by contact pressure, interfacial slip speed and surface temperature. Take-up judder causes driver and vehicle occupant discomfort, as well as gradual wear of contacting surfaces. The response frequency of the system is reported to be in the range 5-20Hz, depending on the clutch system and vehicle inertia.In this paper the measured interfacial friction characteristics together with clamp load variation (contact pressure) under different surface temperatures are included in a multidegree of freedom dynamic analysis to obtain torsional vibrations of the system, pertaining to take-up judder conditions. Such an in-depth investigation has not hitherto been reported in literature. The paper shows that take-up judder is omnipresent under all clutch engagement conditions, but its poignancy is most evident at cold surface temperatures. It is also shown that the transient judder response has a broader spectral content that is generally acknowledged. Keywords Resistive torque Greek symbols Stiffness proportionality coefficient Damping ratioNon-dimensional time parameter

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Section: Introductionmentioning

confidence: 96%

Effect of clutch lining frictional characteristics on take-up judder

Gkinis

Rahmani

Rahnejat

2017

Proceedings of the Institution of Mechanical Engineers, Part K:

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“…In RF12, secondary contact plateaus are formed by thin solid film generated as a consequence of sliding contact that is adhered on its parent worn surface with sintered debris. When the applied pressure is reduced large portions of these solid film areas peel off in flakes [28]. It is seen that the smaller micro voids occurred in the sample having larger rockwool fibre.…”

Section: Microstructural Characteristicsmentioning

confidence: 92%

Effect of Rockwool and Steel fiber on the Friction Performance of Brake Lining Materials

Bernard

Jayakumari

2016

Matéria (Rio J.)

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Wear resistance and Frictional stability are key performance requirements for brake lining. Automotive brake linings are usually made of various ingredients such as binder, filler, friction modifiers and reinforcement. Rockwool is a mineral fiber and steel fiber is a metallic fiber. In this work reinforcement fibers used are both the mineral and metallic fibers with six different composition prepared and tested. The result shows that metallic fibers should be high compared to mineral fiber for best frictional performance and wear resistance. Friction-wear properties of the reinforced samples were investigated on the cast iron disc as a counterpart using a pin on disc wear tester. The investigation confirmed that the sample with increase in steel fiber (4%, 8% and 12%) improves the wear resistance. On the other hand specimen with high content of Rockwool fiber forms an improper ratio among the other ingredients. The SEM images of the sample indicated that an increase in steel fiber higher than 12% content resulted in adhesive wear.Analysis of the experimental result shows that the sample with 12% steel fiber and 8% Rockwool fiber exhibited the optimum friction-wear behavior. Finally the effect of environment on the composites was investigated in water, salt water and oil.

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“…Therefore, the understanding of the friction and wear mechanisms is of great significance on the improvement of reliability and stability of bearings. [13][14][15][16][17][18][19][20][21] In harsh conditions, a conventional lubrication of moving parts is difficult. These moving parts typically operate under dry conditions such as in dust and sand.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Friction and Wear Properties of High-Temperature Bearing Steel 9Cr18Mo

Qu³

et al. 2018

Mat. Res.

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This paper presented a study of friction and wear on 9Cr18Mo when rubbed against other materials (steel-304, steel-440C, steel-GCr15 or silicon nitride ceramic ball) at high temperature conditions. Friction and wear tests were carried out with universal a friction and wear testing machine. The wear morphology was analyzed by a Nanovea three-dimensional profilometer and trinocular positive Gang metallurgical microscope. The Vickers hardness of 9Cr18Mo at different temperatures was tested by means of a high temperature vacuum hardometer. Results showed that the friction and wear on the contact surface of the 9Cr18Mo sample are higher when the hardness of counter materials is higher than or similar to that of the sample. Under dry sliding conditions, the 9Cr18Mo sample surface presented various degrees of adhesion, plowing and pit, particularly if tested in the presence of a high temperature environment. During the worn stages, the counter materials on the worn surface successively produced cracks, crack growth, and wear debris under the action of load. Moreover, the frictional pair 9Cr18Mo-ceramic showed good anti-wear behavior at 400 °C that proved the anti high temperature performance of 9Cr18Mo.

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Experimental characterization of frictional behaviour of clutch facings using Pin-on-disk machine

Cited by 46 publications

References 4 publications

Effect of clutch lining frictional characteristics on take-up judder

Effect of clutch lining frictional characteristics on take-up judder

Effect of Rockwool and Steel fiber on the Friction Performance of Brake Lining Materials

Investigation on Friction and Wear Properties of High-Temperature Bearing Steel 9Cr18Mo

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