KSTLE International Journal

Korean Tribology Society (한국트라이볼로지학회)
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Sub-surface Stress Analysis on Spur Gear Teeth in the EHL Conditions

  • Koo, Young-Pil (School of Mechanical Engineering, Pukyong National University) ;
  • Kim, Tae-Wan (Research Institute of Mechanical Technology, Pusan National University) ;
  • Cho, Yong-Joo (School of Mechanical Engineering, Pusan National University)
  • Published : 2004.06.01
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Abstract

The sub-surface stress field beneath the gear's contact surface caused by the surface pressure in lubricated condition is analyzed. To evaluate the influence of the clearances between a gear tooth and a pinion tooth on the stress field, two kinds of tooth profile models - conventional cylinder contact model and new numerical model - were chosen. Kinematics of the gear is taken into account to obtain the numerical model which is the accurate geometric clearances between a gear tooth and a pinion tooth. Transient elasto-hydrodynamic lubrication (EHL) analysis is performed to get the surface pressure. The sub-stress field is obtained by using Love's rectangular patch solution. The analysis results show that the sub-surface stress is quite dependent on both the surface pressures and the profile models. The maximum effective stress of the new model is lower than that of the old model. The depth where the maximum effective stress occurs in the new model is not proportional to the intensity of the external load.

Keywords

References

  1. Rao, S. S. and Tjandra, Muljadi, 'Reliability-based design of automotive transmission systems,' Reliability Engineering & System Safety, Vol. 46, pp. 159-169, 1994 https://doi.org/10.1016/0951-8320(94)90133-3
  2. Yang, Q. J., 'Fatigue test and reliability design of gears,' International Journal of Fatigue, Vol. 18, pp. 171-177, 1996 https://doi.org/10.1016/0142-1123(95)00096-8
  3. Johnson, K. L., 'Contact mechanics,' pp. 11- 26, 1985
  4. Fuchs, H. O. and Stephens, R. I., 'METAL FATIGUE IN ENGINEERING,' J. WILEY & SONS, pp. 66-75
  5. Hertz. H, Miscellaneous Papers on the contact of elastic solids, Translation by D. E. Jones, McMillan, London, 1986
  6. Hamrock, B. J. Fundamentals of Fluid Film Lubrication, McGRAW-HILL, pp. 141-165, 1994
  7. Dawson, D. and Higginson, G. R., Elastohydrodynamic lubrication, the Fundamentals of Roller and Gear Lubrication,Pergamon, Oxford, 1966
  8. Roelands, C. J. A, Correlational Aspects of the Viscosity-Temperature- Pressure Relationship of Lubricating Oils, Doctoral thesis, Technische Hogeschool te Delt, Netherlands, 1966
  9. Love, A. E. H., 'Stress Produced in a Semi- Infinite Solid by Pressure on Part of the Boundary,' Phil. Trans. Royal Society, A228, pp. 377-420, 1929
  10. Koo, Y. P., Cho, Y. J., Lee, D. W., 2002, '3-Dimensional Elastohydrodynamic Lubrication Analysis on the Cam-Roller Contact with Consideration of Roller Profiling, JSME International Journal, Vol. 45(C), pp. 316-322 https://doi.org/10.1299/jsmec.45.316
  11. Larsson, R. Transient non-Newtonian elastohydrodynamic lubrication analysis of an involute spur gear, Wear 207, pp.67-73, 1997 https://doi.org/10.1016/S0043-1648(96)07484-4
  12. A. P. Boresi, 'Advanced Mechanics of Materials