Simulation Study of Spur Gear Contact Fatigue Life under Multiple Working Conditions
Based on the stress of spur gear static analysis and the stress sub-step history of transient dynamics,combined with the tooth surface friction coefficient under the EHL theory,a spur gear contact fatigue life model is established using Workbench.The results of the static FE simulation are calibrated by the Hertz contact theory,thus the deflation coefficients in the stress history input are determined.The S-N curve of the material is estimated,and the spur gear contact fatigue life is calculated using nCode in the framework of Palmgren-Miner linear damage theory to obtain a life cloud and the location of the hazard nodes.The results show that the dangerous nodes of contact fatigue of gears mostly occur at the two end positions of tooth surface along the tooth width direction of line contact,and the contact fatigue life is negatively correlated with input speed and load torque,positively correlated with friction coefficient,and maximally effected by the load torque.
万方数据
维普
