Browse > Article

Fatigue Design of Bevel Gear for Automobile by Shot Peening  

Lee, Dong-Sun (The Graduate School, Seoul National University of Technology)
Cheong, Seong-Kyun (Department of Mechanical Engineering, Seoul National University of Technology)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.16, no.4, 2008 , pp. 63-68 More about this Journal
Abstract
The fatigue characteristics of bevel gear used for differential gear of automobile was investigated in this paper. From the A-N(Almen intensity-Number of fracture)curve of bevel gear it was shown that there was a specific time that have a maximum fatigue life. Optimal peening condition was 65m/s of project velocity and 8min of project time. Fatigue life was also investigated from the S-N curve between optimal peened specimen and unpeened specimen. Another very significant point is that the crack initiation of bevel gear by shot peening was generated in the subsurface from fractography. This paper shows that shot peening process tremendously improve fatigue characteristics of bevel gear.
Keywords
Shot peening; Optimal peening condition; Fatigue characteristic; Bevel gear; Almen intensity;
Citations & Related Records
연도 인용수 순위
  • Reference
1 J. K. Xenophon, "Shot Peening Viable Method to Extending Component Life," SAE 891932, pp.1-8, 1989
2 HYUNDAI Corporation, Training Guide for Maintenance, pp.1-10, 2005
3 D.-S. Lee, T.-H. Kim, J.-H. Lee, T.-K. Lee and S.-K. Cheong, "A Study on the Improvement of Durability of Gear Steel by Shot Peening," International Conference of the ANDE, p.662, 2005
4 D.-S. Lee, K.-J. Lee, T.-H. Kim and S.-K. Cheong, "A Study on the Investigation of Optimal Peening Intensity for Shot Peened Spur Gear," Transactions of the KSMTE, pp.185-190, 2005
5 J. A. Bannantine, J. J. Comer and J. L. Handrock, Fundamentals of Metal Fatigue Analysis, Prentice Hall Englewood Cliffs, pp. 1-41, 1990
6 H. Wohlfahrt, "The Influence of Peening Condition on the Resulting Distribution of Residual Stress," ICSP-2, pp.316-331, 1984
7 J.-H. Kim, J.-W. Sa, D.-H. Kim and Sang Y. Lee, "An Evaluation of Bending Fatigue Strength for Cold Forged Bevel Gear," Journal of the KSPE, Vol.17, No.1, pp.61-67, 2000
8 J.-H. Nam, T.-H. Kim, K.-J. Lee, D.-S. Lee and S.-K. Cheong, "A Study on the Fatigue Characteristics of Automotive Gear Steel by Investigating the Optimal Peening Intensity," Spring Conference Proceedings, KSAE, pp.1117-1122, 2004