Finite Element Residual Stress Analysis of Planetary Gear Tooth

Abstract EN

A method to simulate residual stress field of planetary gear is proposed.

In this method, the finite element model of planetary gear is established and divided to tooth zone and profile zone, whose different temperature field is set.

The gear’s residual stress simulation is realized by the thermal compression stress generated by the temperature difference.

Based on the simulation, the finite element model of planetary gear train is established, the dynamic meshing process is simulated, and influence of residual stress on equivalent stress of addendum, pitch circle, and dedendum of internal and external meshing planetary gear tooth profile is analyzed, according to non-linear contact theory, thermodynamic theory, and finite element theory.

The results show that the equivalent stresses of planetary gear at both meshing and nonmeshing surface are significantly and differently reduced by residual stress.

The study benefits fatigue cracking analysis and dynamic optimization design of planetary gear train.