2922 Simulation of Surface Durability of Carburized Gears Based on the Inclusions of Material
Details
The principal damage of gear is tooth breakage and pitting. The material defect affects both types of damage. A simulation method to estimate the bending strength of carburized gears based on the defect has been proposed. In contrast, the simulation of surface durability has not been presented yet,because the mechanism of pitting is very complicated. In this study, the simulation of bending strength is applied to pitting, and an estimation method of surface durability is proposed. The strength of material used for the criterion of tooth breakage is modified by multiplying by 0.8. The peak-to-peak value of shear stress T*_<yz> is adopted as the measure of proposed simulation. The estimated fatigue limit is close to the test results. The presented method also shows good result in the discussion of the influence of effective case depth.
