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Optimization of Tooth Root Profile of Spur Gears for Maximum Load-Carrying Capacity

[+] Author Affiliations
Ting Zou, Mathew Shaker, Jorge Angeles, Alexei Morozov

McGill University, Montreal, QC, Canada

Paper No. DETC2014-34568, pp. V02BT03A017; 8 pages
  • ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 2B: 40th Design Automation Conference
  • Buffalo, New York, USA, August 17–20, 2014
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-4632-2
  • Copyright © 2014 by ASME


Increasing the strength of the gear tooth is a recurrent demand from industry. The authors report a novel approach to the design of tooth-root profile of spur gears using cubic splines, with the aim of investigating the effect of tooth-root geometry on stress concentration in order to increase the gear tooth strength by optimizing the root profile. An iterative co-simulation procedure, consisting of tooth-root profile shape synthesis via nonlinear programming and finite element analysis software tools is conducted, for the purpose of forming the tooth-root geometry design with the minimum stress concentration. The proposed design was verified to be capable of reducing the stress concentration by 21% over its conventional circular-filleted counterpart. Hence, the results showcase an innovative and sound methodology for the design of the tooth-root profile to increase gear load-carrying capacity.

Copyright © 2014 by ASME



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