Static and dynamic study for the prediction of contact fatigue on spur gear teeth

The main objective of this article is to study the influence of static and dynamic behavior on the occurrence of contact fatigue on spur gear tooth. For this end, a dynamic model of geared transmission in one degree of freedom, with Crossland criterion, are used. The motion equation is analyzed step par step in the time in order to determine the dynamic load in all contact points on teeth profile. In this way, the time-varying dynamic loads on tooth flanks are determined and the subsurface stress components can be derived from the classic Hertzian theory.