Model validation and uncertainty analysis in the wear prediction of a wet clutch

Li, M.; Khonsari, M. M.; Lingesten, Niklas; Marklund, Pär; McCarthy, D.M.C.; Lundin, Joakim

doi:10.1016/j.wear.2016.07.007

Cited by 18 publications

(7 citation statements)

References 17 publications

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“…Substituting the results of the Grashof number calculated into (11), the Rayleigh number 11095.8 can be obtained. Nusselt number 6.08 can be obtained by substituting the Rayleigh number into (10). Finally, the free convection heat transfer coefficient (h con ) of the target gear ring is 6.08 W/m 2 …”

Section: Heat Transfer Modelingmentioning

confidence: 99%

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Friction Characteristics of Synchronization Process Based on Tribo‐Thermodynamics

Yuan

et al. 2018

Advances in Materials Science and Engineering

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In order to improve the shift control accuracy and shift quality, the temperature and friction coefficient changing regularities of a friction cone during the synchronization process were investigated. e thermal-structural coupling model was established through tribo-thermodynamic analysis. e relevant experiment was carried out as well. e results show that the error between the experimental and simulated results is within 3%. Besides, the maximum temperature of the synchronous ring friction surface increases 1.8°C for every additional 50 N of shift force, while increases 1.1°C for every additional 200 r/min shift speed difference. Moreover, the friction coefficient declines rapidly first and then tends to be stable slowly during the synchronization process. e result of friction coefficient changing regularity lays a good theoretical basis for establishing an effective friction coefficient compensation control strategy.

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Section: Heat Transfer Modelingmentioning

confidence: 99%

“…Li et al present a model of predicting wear in the friction lining of a wet clutch and introduces that the wear mechanism is related to thermal degradation [9,10]. Marklund and Larsson develop a friction model which takes temperature, speed, and nominal pressure into account of the wet clutch during boundary lubrication conditions [11,12].…”

Section: Introductionmentioning

confidence: 99%

Friction Characteristics of Synchronization Process Based on Tribo‐Thermodynamics

Yuan

et al. 2018

Advances in Materials Science and Engineering

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“…The commonly used friction materials for friction discs are copper-based friction materials (CBFM) and paper-based friction materials (PBFM) [10]. Compared with PBFM, CBFM has better compact resistance, a steady COF, and excellent mechanical properties [11,12].…”

Section: Introductionmentioning

confidence: 99%

Effect of Silicon Carbide Nanoparticles on the Friction-Wear Properties of Copper-Based Friction Discs

Zheng

et al. 2022

Materials

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To study the influence of nano-additives on the friction-wear characteristics of friction materials, the nano-sized silicon carbide particles which have excellent chemical and physical properties are considered to add in composite to form the modified friction material. The influence of the silicon carbide nanoparticles (SCN) on the friction-wear characteristics of copper-based friction materials (CBFM) is investigated via the SAE#2 (made in Hangzhou, China) clutch bench test with the applied pressure, rotating speed, and automatic transmission fluid (ATF) temperature taken into account. Moreover, the variations of friction torque and temperature are considered to evaluate the friction performance, and the variable coefficient is employed to describe the friction stability. The wear characteristics of friction materials are investigated by the disc changes in thickness and micro-morphology. The results show that the CBFM with SCN can provide a higher friction torque, which increased by 30% to 50% compared with CBFM. The variable coefficient of CBFM with SCN changes from 674 to 52 with the rotating speed raised from 600 rpm to 3000 rpm, which shows that the friction stability is relatively worse. Furthermore, the micromorphology shows that the CBFM with SCN has lower porosity and surface roughness, which increases the microscopic contact area and the coefficient of friction (COF). Simultaneously, the reduction in porosity also leads to a decrease in the cooling quality, bringing about a rapid temperature rise. Thus, the wear amount of CBFM with SCN increases significantly, especially for the friction disc in the axial middle position.

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“…The results showed that the greater the friction coefficient is, within a certain range, the higher the temperature between the friction surfaces. Additionally, Li presented a model of predicting wear in the friction lining of a wet clutch and introduced that the wear mechanism is related to thermal degradation [10]. Marklund developed a friction model which takes temperature, speed, and nominal pressure into account for the wet clutch during boundary lubrication conditions [11].…”

Section: Introductionmentioning

confidence: 99%

Friction Coefficient Compensation Control in Synchronizer Synchronization Process for Transmission

Yuan

et al. 2019

Applied Sciences

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In the synchronization process of a synchronizer, the friction coefficient of the friction cone is changed because of friction heat. In this paper, the influence of a changing friction coefficient on shift quality was analyzed. The quantitative relationship between friction coefficient and its influencing factors was studied through a synchronizer synchronization process test bench. Based on the quantitative analysis and an optimal shift force control method, a compensation control strategy for friction coefficient was established. Moreover, the effectiveness of the compensation control was verified through simulation and experiment. The results showed that the friction coefficient was maintained near the expected value of 0.08 after the compensation control, the shifting speed difference the synchronous time was shortened by nearly 0.12 s, and the sliding friction was reduced by 4.64 J under the experimental conditions. The analysis and compensation of the friction coefficient provide a theoretical reference for improving shift quality.

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Model validation and uncertainty analysis in the wear prediction of a wet clutch

Cited by 18 publications

References 17 publications

Friction Characteristics of Synchronization Process Based on Tribo‐Thermodynamics

Friction Characteristics of Synchronization Process Based on Tribo‐Thermodynamics

Effect of Silicon Carbide Nanoparticles on the Friction-Wear Properties of Copper-Based Friction Discs

Friction Coefficient Compensation Control in Synchronizer Synchronization Process for Transmission

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