Boundary Condition -Ball Bearing

- October 12, 2024 at 8:36 pm
  
  ashishkumar.gupta
  Subscriber
  
  The ball has to rotate around their own axis in Z direction as the IR rotates and OR is fixed. This will give rise to contact stresses (Herztian region)
  I am not able to come up with the correct B.C./Solver setup. Could you please help me out here?
  Thank you!!
  
  Thank you!!
- October 14, 2024 at 2:39 pm
  
  dlooman
  Ansys Employee
  
  The boundary condition is just a small theta displacement of the inner race. A difficulty may be that the races are not applying any compression to the ball. As you mention you have hertzian contact between the ball and the race. Resolving that require perfect geometry and an infinitessimal amount of geometric overlap. Step 1 should be a static analysis of the hertzian contact. If that looks good then try to rotate the inner race a small amount. That could be a static analysis as well. The dynamic effects in such an analysis are secondary.