Gear Tooth-Root Stress of Single Pair Contact

Based upon the developed complex pinion-wheel 3D FEM numerical model, the tooth-root stress was determined of spur gear for the meshing phase. The obtained results pointed to maximum stress magnitude reached for the single pair tooth contact, and these fillet stresses have been analysed in this paper, related to the gear geometrical parameters taken into account. The tooth root stress was determined for the gear, which can be considered as narrow and wider faced one. As the fillet stress behaviour is strongly influenced by the rim thickness, there have been considered solid and thin-rimmed gear. These parameters, the tooth facewidth and the rim thickness, have been followed for the gears of different geometry determined by fewer and larger number of teeth. Equivalent von Mises stress was determined along with maximum tangential stress component on tensile side of the loaded tooth root, and the comparison with nominal bending stress according to the ISO calculation procedure was accomplished.