Unconverged contact analysis

- December 1, 2019 at 12:43 am
  
  Pepe26
  Subscriber
  
  Hello,
  
  I am trying to converge quite easy case, where a cylinder is partially surrounded by two different materials with interference around 0,1 mm. The aim of this analysis is just to close the interference. It is a structural static analysis, with large deformation activated. I've used standard contact behavior with friction coefficient= 0,01 just to prevent the rigid body motion. Finally it is not converging, stopping after 60-70% of time step. It is metal to wood connection. KEYOPT (9) is set to include everything with ramped effect, KEYOPT(6)=2, no automatic contact adjustment KEYOPT(5), CNOF=0, FKN=1.
  
  The last - finally unconverged sub-step is showing something like a flag, at the top elements from the screw head. Please see the attached file. I could not get rid of that.
  
  Could you please suggest how can I improve the convergence?
- December 1, 2019 at 12:55 am
  
  peteroznewman
  Subscriber
  
  ANSYS staff are not permitted to download attachments. Please use the Insert Image button to put images directly in your future posts.

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