Improving bending stress in spur gears using asymmetric gears and shape optimization

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Bending stress plays a significant role in gear design wherein its magnitude is controlled by the nominal bending stress and the stress concentration due to the geometrical shape. The bending stress is indirectly related to shape changes made to the cutting tool. This work shows that the bending stress can be reduced significantly by using asymmetric gear teeth and by shape optimizing the gear through changes made to the tool geometry. However, to obtain the largest possible stress reduction a custom tool must be designed depending on the number of teeth, but the stress reductions found are not very sensitive to small design changes. This observation suggests the use of two new standard cutting tools. © 2010 Elsevier Ltd. All rights reserved.
Original languageEnglish
JournalMechanism and Machine Theory
Volume45
Issue number11
Pages (from-to)1707-1720
ISSN0094-114X
DOIs
Publication statusPublished - 2010

Keywords

  • Tool design
  • Gear
  • FEM
  • Asymmetry
  • Bending stress
  • External spur

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