Influence of tenon structure contact surface geometry on contact stress

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%.