Maximum Fillet Stress Analysis Based on Load Sharing in Normal Contact Ratio Spur Gear Drives^#

Abstract

An optimum design of high-quality gears requires an accurate estimation of the tooth load. Since only a fraction of the total load is shared by each pair, when there is contact in more than one pair during transmission, the same has been estimated with a reasonable accuracy through the load-sharing ratio calculated using the single-point loaded model. The reliability of this method has also been justified by comparison with multipair contact models and also by checking with the values available in the literature. The influence of finite-element modeling, boundary conditions, gear ratio, teeth number, module, pressure angle at pitch circle, backup ratio, generating rack cutter tip radius, and addendum modification factor on the load-sharing ratio and in turn in the maximum fillet stress has been studied and discussed using single-point loaded model of normal contact ratio gear pairs in this study.

Keywords:

• Compliance
• Contact stress
• Fillet stress
• Load-sharing ratio
• Normal contact ratio
• Stiffness

Notes

^#Communicated by S. Velinsky.