The 3Dcontact finite element model of the input spiral bevel gear pair of vertical mill reducer is built

the flexible-body dynamics simulation analysis of bevel gear pair is carried out by using the LS-DYNA software

and the transient contact force is obtained

the fatigue life of the bevel gear pair is performed by using maximum main stress algorithm in FE-SAFE based on fatigue load spectrum

the S-N curve of the bevel gear pair and stress results of the bevel gear pair under static load.Then

the influence of stress concentration

loads and residual stress on fatigue life of bevel gear pair are studied based on the results above.The results indicate that the life decreases of bevel gear pair with the increase of stress concentration and loads

the fatigue life shows sensitization to loads

the residual tensile stress leads to a reduction of bevel gear pair fatigue life

however

the residual press stress leads to a increase of bevel gear pair fatigue life.