Abstract
Typically, O-rings are used to prevent penetration of dust and alien substances from entering a cylinder during motion. Moreover, Orings are used to create an air tight seal around a stationary shaft. The stresses developed in O-rings depend on the squeeze rate, gap between the external diameter of the groove and internal diameter of the cylinder as well as internal pressure. In application, the stress distributions in O-rings can be very complicated and are almost always studied through experiment. Photoelastic experiment has been applied to the study of 3-dimensional stress distributions in O-rings. The loading device used in photoelastic experiment is important. Its function is to apply a uniform squeeze rate and internal pressure on the O-ring and to allow uniform squeeze rate to be controlled. In this research, a loading device was developed to perform these functions. The validity of this loading device was confirmed through the stress distribution, the configuration change and the contact length of the O-ring. When the squeeze rate was constant, the upper and lower contact lengths of the deformed O-ring were almost equal. When internal pressure was applied to the O-ring, while under a uniform squeeze rate the upper contact length increases slightly with increase in internal pressure, while the lower contact length of the O-ring is constant with an increase in internal pressure.
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References
A. Strozzi, Static Stresses in an Unpressurized, rounded, rectangular, elastometric seal, Asle Transactions, 29(4) (1986) 558–564.
A. F George, A. Strozzi and J. I. Rich, Stress fields in a compressed unconstrained elastomeric O-ring seal and a co MParison of computer predictions with experimental results, Tribol. Int., 20 (1987) 237–247.
E. Dragoni and A. Strozzi, Theoretical analysis of an unpressurized elastomeric O-ring seal into a rectangular groove, Elsevier Sequoia, Wear, 130 (1989) 41–51.
E. Dragoni and A. Strozzi, Analysis of an unpressurized, laterally restrained, elastomeric O-ring seal, Journal of Tribology, 110 (1988) 193–200.
A. Karaszkiewicz, Geometry and contact pressure of an Oring mounted in a seal groove, Ind. Eng. Chem. Res. 29, (1990) 2134–2137.
I. K. Lee and C. K. Kim, Numerical simulations on the Oring extrusion in automotive engines, Journal of the KSTLE, 15(4) (1999) 297–303.
D. B. Lindley, Load compression relationship of rubber units, J. Strain Analysis, (1996) 190–195.
D. B. Lindley, Compression characteristics of laterally-unstrained rubber O-rings, J. of IRI, 1, (1967) 209–213.
A. F. George, A. Strozzi and J.I. Rich, Stress fields in a compressed unconstrained elastomeric O-ring seal and a co MParison of computer predictions with experimental results”, Tribol. Int., 20(5), (1987) 237–247.
B. M. Gorelik and G. I. Feld’man, Study of stresses in a flat section of a rubber sealing ring of circular transverse section, Soviet Rubber Technology, (4) (1965) 27–31.
E. T. Jagger and P. S. Walker, Further Studies of the lubrication of synthetic rubber rotary shaft seals, Proc. Inst. Mech. Engrs, 181 Pt I (9), (1966–1967) 191–204.
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This paper was recommended for publication in revised form by Associate Editor Jeong Sam Han
Jeong-hwan Nam received a B.S. degree in Mechanical Engineering from Yeungnam University in 1986. Then he received his M.S. degree and Ph.D. degree from Yeungnam University in Korea in 1996 and from Saitama Institute of Technology in Japan in 2005, respectively. Dr. Nam is currently a Researcher at the school of Mechanical Engineering at Yeungnam University, in Gyeongsan city, Korea. Dr. Nam’s research interests are the areas of mechanical design, stress analysis and experimental mechanics for stress analysis etc.
Jai-Sug Hawong received a B.S. degree in Mechanical Engineering from Yeungnam University in 1974. Then he received his M.S. degree and Ph.D. degree from Yeungnam University in Korea in 1976 and from Kanto Gakuin University in Japan in 1990, respectively. Prof. Hawong is currently a professor at the school of Mechanical Engineering at Yeungnam University, in Gyeongsan city, Korea. He is currently serving as an president of Korea Society Mechanical Engineering. Prof. Hawong’s research interests are the areas of static and dynamic fracture mechanics, stress analysis, experimental mechanics for stress analysis and composite material etc.
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Nam, JH., Hawong, JS., Kim, KH. et al. A study on the development of a loading device using a photoelastic stress freezing method for the analysis of o-ring stress. J Mech Sci Technol 24, 693–701 (2010). https://doi.org/10.1007/s12206-010-0201-2
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DOI: https://doi.org/10.1007/s12206-010-0201-2