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Coupling Between Dynamic Behavior and Contact Fatigue in Spur Gears

[+] Author Affiliations
T. Osman, P. Velex

Université de Lyon, LaMCoS, UMR CNRS 5259, INSA de Lyon, Villeurbanne, France

Paper No. DETC2011-47314, pp. 101-111; 11 pages
doi:10.1115/DETC2011-47314
From:
  • ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 8: 11th International Power Transmission and Gearing Conference; 13th International Conference on Advanced Vehicle and Tire Technologies
  • Washington, DC, USA, August 28–31, 2011
  • Conference Sponsors: Design Engineering Division and Computers and Information in Engineering Division
  • ISBN: 978-0-7918-5485-3
  • Copyright © 2011 by ASME

abstract

The main objective of the paper is to study the possible interactions between contact fatigue and dynamic tooth loads on gears. A specific 3D dynamic gear model is combined to contact fatigue models accounting for crack initiation and propagation. The numerical findings compare well with the experimental evidence from a back-to-back test rig. Five characteristic points on a tooth profile are analyzed and it is shown that contact fatigue on spur gears clearly depends on dynamic phenomena. Finally, the introduction of profile relief is discussed and its positive influence on the risk of failures at engagement is emphasized.

Copyright © 2011 by ASME
Topics: Fatigue , Gears , Spur gears

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