Spur Tooth-root Maximum Stress of Meshing Phase

By means of 3D FEM calculation, the root stress of standard spur gear tooth has been determined. The developed numerical pinion-gear model enabled the simulation of actual load sharing between two teeth in contact, and the change of tooth-root stress has been observed for the change of meshing phase. Related to the gear geometry (number of teeth, rim thickness, tooth facewidth) the points of meshing phase have been selected where maximum tooth-root stress is reached. These values of tangential stress component and equivalent von Mises stress have been related to the stress value according to ISO 6336-3 standard procedure.