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http://dx.doi.org/10.9725/kts.2019.35.1.52

FEM Analysis of a Waterproof Seal of Automotive Electrical Connectors  

Han, JeongJin (Graduate School, Dept. of Automotive Engineering, Seoul National University of Science and Technology)
Hwang, WonTae (Graduate School, Dept. of Automotive Engineering, Seoul National University of Science and Technology)
Kim, HoKyung (Dept. of Mechanical & Automotive Engineering, Seoul National University of Science and Technology)
Publication Information
Tribology and Lubricants / v.35, no.1, 2019 , pp. 52-58 More about this Journal
Abstract
In the case of high-voltage connectors applied to automobiles, waterproofing has become an important issue for the safety of automobiles. In this study, structural analysis is performed on silicone rubber-type waterproof seals used in the voltage connector. For the structural analysis, the tensile properties of the actual rubber seal are evaluated using a miniaturized tensile testing machine. The Mooney-Rivlin material constants of the rubber seal are determined as follows; $D_1=0$, $C_{01}=0.241$, $C_{10}=0.0142$. The analysis shows that the contact pressure at the top of the seal where the seal and male connector are in contact is approximately three times higher than that at the bottom of the seal where the seal and female connector are in contact. It is confirmed that the waterproofing performance of the rubber seal depends on the contact pressure of the seal bottom where the seal and female connector are in contact. The contact pressure for waterproofing is found to be 4.7 bar. The strain concentration of the curved part is attributed to excessive initial tension. Therefore, a redesign is recommended for uniform stress or strain distribution in the curved section of the seal in response to the stress relaxation problem due to permanent deformation.
Keywords
connector seal; rubber properties; waterproof seal; contact pressure;
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  • Reference
1 Kim, C. K., "Finite element analysis of contact behaviors of rubber lip seals", J. of the KSTLE, Vol. 10, No. 4, pp.82-88, 1993.
2 Yoo, M. H., Lee. T. S., "A study on the relationship between stress and stress relaxation and performance of a lip seal", J. Korean Sci. Precision Eng., Vol. 26, No. 11, pp. 85-91, 2009.
3 Belforte G., Mazza L., Visconte C., "Design methodology for an air-lubricated seal", Tribology Int., Vol. 75, pp. 104-110, 2014.   DOI
4 Moon, H., Im, J., Kim, H., "Shape optimization of an automotive wheel bearing seal using the response surface method", Trans. of KSME, Vol.18, No.6, pp. 84-90. 2010.
5 Wen, C. Y., Yang, A. S., Huang, F. J., Chang, H. T., "New deflected-helix ribbed lip seal with enhanced sealing performance", Tribology Int., Vol.44, pp. 2067-2073, 2011.   DOI
6 Pinedo, B., Aguirrebeitia, J., Conte, M., Igartua, A., "Tri-dimensional eccentricity model of a rod lip seal", Tribology Int., Vol. 78 pp. 68-74, 2014.   DOI
7 Ping, C. S., Seth, A., "Optimization of contact pressure profile for performance improvement of a rotary elastomeric seal operating in abrasive drilling environment", Wear, Vol. 271, pp. 2466-2470, 2011.   DOI
8 Rivlin, R. S., Saunders, D. W., "Large elastic deformation of isotropic materials - VII. Experiments on the deformation of rubber", Philos. Trans. R. Soc. (A), Vol. 243, pp. 251-288, 1951.   DOI
9 Ogden, R. W., "Large deformation isotropic elasticity: On the correlation of theory and experiment for incompressible rubberlike solids," Philos. Trans. R. Soc.(A), Vol. 326, pp. 565-584, 1972.   DOI