Targeting the contact boundary calculation accuracy problems

grid partition strategy suitable for the tenon structure contact area was proposed in combination with the photo-elastic experiment. On this basis

further analysis of the influence of tooth structure and tooth profile angle on the contact stress was taken

and applied to verify the trapezoidal tooth structure. Result shows that

the trapezoidal tooth of reasonable structure can effectively reduce the contact stress

with less influence on other dangerous parts

so the reasonably designed trapezoidal tooth has a certain advantage compared with the circular arc tooth. After the optimization which takes the trapezoidal tooth contact angle as design variable

the maximum equivalent stress of contact boundary drops 25.54%.