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http://dx.doi.org/10.9725/kts.2019.35.5.267

Drag Torque Prediction for Automotive Wheel Bearing Seals Considering Viscoelastic as Well as Hyperelastic Material Properties  

Lee, Seungpyo (R&D Center, ILJIN Global)
Publication Information
Tribology and Lubricants / v.35, no.5, 2019 , pp. 267-273 More about this Journal
Abstract
Wheel bearings are important automotive parts that bear the vehicle weight and translate rotation motion; in addition, their seals are components that prevent grease leakage and foreign material from entering from the outside of the bearings. Recently, as the need for electric vehicles and eco-friendly vehicles has been emerging, the reduction in fuel consumption and $CO_2$ emissions are becoming the most important issues for automobile manufacturers. In the case of wheel bearings, seals are a key part of drag torque. In this study, we investigate the prediction of the drag torque taking into consideration the hyperelastic and viscoelastic material properties of automotive wheel bearing seals. Numerical analysis based on the finite element method is conducted for the deformation analyses of the seals. To improve the reliability of the rubber seal analysis, three types of rubber material properties are considered, and analysis is conducted using the hyperelastic material properties. Viscoelastic material property tests are also conducted. Deformation analysis considering the hyperelastic and viscoelastic material properties is performed, and the effects of the viscoelastic material properties are compared with the results obtained by the consideration of the hyperelastic material properties. As a result of these analyses, the drag torque is 0.29 Nm when the hyperelastic characteristics are taken into account, and the drag torque is 0.27 Nm when both the hyperelastic and viscoelastic characteristics are taken into account. Therefore, it is determined that the analysis considering both hyperelastic and viscoelastic characteristics must be performed because of its reliability in predicting the drag torque of the rubber seals.
Keywords
automotive wheel bearing; rubber seal; hyperelastic analysis; viscoelastic analysis; drag torque;
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  • Reference
1 Lee, S. P., "Bearing Life Evaluation of Automotive Wheel Bearing Considering Operation Loading and Rotation Speed", Trans. Korean Soc. Mech. Eng. A, Vol.40, No.6, pp.595-602, 2016.   DOI
2 Lee, S., Lee, N., Lim, J., Park, J., "The Effect of Outer Ring Flange Concavity on Automotive Wheel Bearings Performance", SAE Int. J. Passeng. Cars Mech. Syst., Vol.9, No.3, doi:10.4271/2016-01-1958, 2016.   DOI
3 Jun, I. K., Shim, W. J., Choi, I. H., Kim, C. K., "Experimental Study on the Contact Force of Rubber Seals for a Ball Bearing", J. Korean Soc. Tribol. Lubr. Eng., Vol.9, No.1, pp.32-37, 1993, https://doi.org/10.9725/kstle.1993.9.1.032   DOI
4 Moon, H. I., Im, J. S., Kim, H. Y., "Shape Optimization of an Automotive Wheel Bearing Seal Using the Response Surface Method", Trans. KSAE, Vol.18, No.6, pp.84-90, 2010.
5 Park, J. Z., Measure to Improve the Accuracy of the Drag Torque Prediction on the Wheel Bearing Seals for Automobiles, Master Thesis, Kangwon National University, Chuncheon, 2016.
6 ASTM D 412, "Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers - Tension," ASTM International, West Conshohocken, PA, 2016.
7 Miller, K., "Testing Elastomers for Hyperelastic Material Models in Finite Element Analysis," Axel Products Inc., Ann Arbor, MI, 2016.
8 ANSYS Workbench Engineering Data User's Guide, Release 19.1, ANSYS, Inc., Southpointe, 275 Technology Drive, Canonsburg, PA 15317, 2016.
9 Lee, S., "Drag Torque Prediction of Automotive Wheel Bearing Seals", Trans. KSAE, Vol.25, No.5, pp.563-572, 2017.   DOI