Critical Loading Points for Maximum Fillet and Contact Stresses in Normal and High Contact Ratio Spur Gears Based on Load Sharing Ratio

Abstract

Maximum contact and fillet stresses in normal and high contact ratio spur gears are evaluated based on load sharing ratio using finite element method through single- and multi-point loaded models as well as multi-pair contact model. The multi-pair contact model has been justified as an appropriate one for the present analysis as this model exclusively considers the influence of the loaded adjacent teeth and the Hertz contact deflections. A detailed parametric study on the load sharing ratio and the respective stresses has also been carried out to analyze the effect of addendum height, the pressure angle, gear ratio, teeth number, and tooth size. Finally, the importance of load sharing ratio and the critical loading points for maximum fillet and contact stresses in normal and high contact ratio spur gears is highlighted for the effective design.