International Journal of Automotive Technology

The Korean Society of Automotive Engineers (한국자동차공학회)
권호 표지

EFFECT OF RESIDUAL STRESS BY SHOT PEENING ON FATIGUE STRENGTH OF LCV LEAF SPRING

  • BAE D. H. (School of Mechanical Engineering, Sungkyunkwan University) ;
  • SOHN I. S. (Department of Machine Design Engineering, Osan College) ;
  • JUNG W. S. (Graduate School, Mechanical Engineering Department, Sungkyunkwan University) ;
  • KIM N. S. (Department of Mechanical Engineering, Sogang University) ;
  • JUNG W. W. (Hyundai Motor Company) ;
  • PARK S. C. (Hyundai Motor Company)
  • Published : 2005.12.01
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Abstract

Spring is one of major suspension part of the light commercial vehicle (LCV). In the manufacturing process it is shot-peened to improve its fatigue strength. In this paper, residual stresses by shot peening were calculated through finite element analysis, and the effects of these residual stresses on fatigue strength of leaf spring were evaluated. Fatigue tests were performed with two kinds of specimens; one is actual leaf spring assembly, and the other is simulated 3-point bending specimen. Fatigue tests were performed under the loading condition that was measured on the proving ground. From the results, the maximum load-fatigue life relation of leaf spring was defined, and test results of 3 point bending specimen are in good agreement with those of leaf spring assembly. The effects of residual stresses by shot peening on fatigue strength of leaf spring is not large in the high load range, however, in the low load range, its effects were not negligible.

Keywords

References

  1. Aleksandrov, V. M. and Pozharskii, D. A. (1994). Contact stresses at the apex of a wedge-shaped punch pressed upon the edge of an elastic three-dimensional wedge. J. Applied Mathematics and Mechanics 58,1,143
  2. Bae, D. H., Shon, I. S., Jung, W. S., and Park, S. C. (2004). Fatigue design of leaf spring based on proving ground. Key Engineering Materials 261-263, 1295-1300 https://doi.org/10.4028/www.scientific.net/KEM.261-263.1295
  3. Eleiche, A. M., Megahed, M. M., and Alod-Allah. (2001). The shot peening effect on the HCF behavior of high strength martensite steels. J. Material Processing Technology 113, 502-508 https://doi.org/10.1016/S0924-0136(01)00601-X
  4. Feng, J. Z., Li, J., and Yu, F. (2003). Ga-based Pill and fuzzy logic control for active vehicle suspension system. Int. J. Automobile Technology 4, 4,181-192
  5. Kim, O. S. (1996). Handbook of Automotive Technology, 2nd Edition, Publication by The KSAE, 445-500
  6. Kim, C., Yang, W. H., Seong, K. D., and Ko, M. H. (2001). Finite element analysis to predict residual stress by shot peening. Trans. Korean Society of Automotive Engineers 9,1, 198-204
  7. Schiffner, K., Droste, C., and Helling, G. (1999). Simulation of Residual Stresses by Shot Peening. Computer & Structures 72, 329-340 https://doi.org/10.1016/S0045-7949(99)00012-7