Three-Dimensional Finite Element Analysis of Contact Problem in Dry Friction Clutches

Sabri, Laith Abed; Stojanović, Nadica; Senatore, Adolfo; Jweeg, Muhsin J.; Abed, Azher M.; Abdullah, Oday I.

doi:10.3390/lubricants9120115

Cited by 5 publications

(4 citation statements)

References 15 publications

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“…Thus, the slightly higher temperatures on the friction interface can be explained. Sabri [32] describes the influence on temperature and pressure behavior during load shifting of a dry single-disc clutch. The main result is that the contact pressure decreases with a reduction of Young's modulus of the friction linings.…”

Section: Discussionmentioning

confidence: 99%

Analysis of the Thermo-Mechanical Behavior of a Multi-Plate Clutch during Transient Operating Conditions Using the FE Method

et al. 2022

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Failures of multi-plate clutches must be reliably excluded due to safety-critical functionalities in the drive train. The main reason for failures of multi-plate clutches due to long-term and spontaneous damage is thermal damage. In this paper, a parameterizable two-dimensional finite element model is developed and validated for damage prevention and for analyzing the thermo-mechanical behavior of a clutch in transient operation. Both numerical verification and validation with experimental results are very good despite the simplifications in the model. Subsequently, the temperature and pressure distribution of the individual friction areas is determined. The results show that the maximum temperatures tend to occur at the outer diameter of the friction area. The pressure distribution is very homogeneous. In a parameter study, the influence of Young’s modulus of the friction lining, the thermal conductivity of the friction lining, and the steel plate thickness on the temperature and pressure behavior in the clutch is investigated. Although the Young’s modulus of the friction lining influences the pressure distribution in the friction contact, the temperature behavior is only slightly changed by the variation of the elastic modulus due to the load case. The thermal conductivity of the lining and steel plate thickness have a strong influence on the temperature level in the clutch. However, the distribution of pressures is still very homogeneous compared to the reference model.

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Section: Discussionmentioning

confidence: 99%

Analysis of the Thermo-Mechanical Behavior of a Multi-Plate Clutch during Transient Operating Conditions Using the FE Method

et al. 2022

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“…The friction clutch system has more than one task, but the main one is the power transmission from the driving side (engine) to the driven side (gearbox). The other tasks are absorbing the vibration from the engine and providing a smooth transition under different vehicle driving conditions [1]. The most significant problem in the clutch system is the high surface temperatures resulting from the excessive frictional heat generation, which is mainly due to the slipping that occurs between the clutch components.…”

Section: Introductionmentioning

confidence: 99%

“…The material characteristics of each layer are shown in Table 6. It was assumed that the heat transfer coefficient was a constant and equaled 40.89 W/m 2 K. A heat conduction equation was then applied to the frictional clutch's primary components [1],…”

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An Experimental Investigation and Numerical Analysis of the Thermal Behavior of a Clutch System Using the Frictional Facing of Functionally Graded Materials

Jabbar,

Hussain,

Abdullah

et al. 2023

Designs

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The friction clutch design strongly depends upon the frictional heat generated between contact surfaces during slipping at the beginning of the engagement. Firstly, the frictional heat generated reduces the performance of the clutch system and then leads to premature failure for contacting surfaces in some cases. The experimental effort in this work included manufacturing friction facing from functionally graded material (FGM) (aluminum and silicon carbide) for the clutch system. For this purpose, a special test rig was developed to investigate the thermal behavior of FGM and compare it with other frictional materials. The Taguchi L9 orthogonal design was selected to analyze the effect of the three factors (rotational, speed, torque, and the type of the frictional material) with three levels on the surface temperature of the contacting surfaces. A three-dimensional finite element model was built to validate the experimental results where the difference between them did not exceed 5.2%. The experimental results showed that the temperatures grew with the disc radius. Furthermore, the surfaces of the pressure plates and the flywheel were affected by frictional heat flow, and this effect increased when increasing the sliding speed. The lowest temperatures occurred when using FGM, which was lower than the other materials by 10%. This study presented an integrated approach consisting of design, manufacturing, and testing to study the complex frictional materials’ effect on the clutch system’s tribological performance.

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Transient temperature characteristics of friction clutch disc considering thermal contact conductance under sliding conditions

Liu

Sun²,

Gao³

et al. 2023

Friction

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High temperatures are generated due to the sliding contacts between the rubbing surfaces of the friction clutch system. In this work, by considering the effective thermal contact conductance under sliding conditions, a simulation model of a two-dimensional transient temperature field of the clutch disc was developed. A numerical solution to obtain the surface temperature at different radii was presented based on the finite difference method. Compared with the experimental data, the proposed model for estimating the surface temperature is more accurate than the conventional prediction method. The results showed that the errors of the calculated temperatures at radii of 114 and 106 mm have obviously reduced by 12.98% and 12.60%, respectively. In addition, the influences of pressure and relative speed on the surface temperature were investigated. The temperature increases with the increase of the relative speed and pressure during the sliding period, and there is an interaction effect between pressure and speed on the surface temperature rise.

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Three-Dimensional Finite Element Analysis of Contact Problem in Dry Friction Clutches

Cited by 5 publications

References 15 publications

Analysis of the Thermo-Mechanical Behavior of a Multi-Plate Clutch during Transient Operating Conditions Using the FE Method

Analysis of the Thermo-Mechanical Behavior of a Multi-Plate Clutch during Transient Operating Conditions Using the FE Method

An Experimental Investigation and Numerical Analysis of the Thermal Behavior of a Clutch System Using the Frictional Facing of Functionally Graded Materials

Transient temperature characteristics of friction clutch disc considering thermal contact conductance under sliding conditions

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