In ball and socket joint analysis with friction coefficient as 0.3, I got this warning

- March 24, 2021 at 2:14 pm
  
  Mukka_Srikanth
  Subscriber
  
  In my project while doing fatigue analysis of ball and socket joint for hip implant,
  Screenshot (232).png
- March 24, 2021 at 8:30 pm
  
  Bhargava Sista
  Ansys Employee
  
  High friction (typically coeff. of friction higher than 0.2) between surfaces can make the stiffness matrix unsymmetric. Sometimes, such cases may face convergence issues in which case using an unsymmetric Newton-Rapshon solver is helpful. In your case, if you did not run into any convergence issues and have a solution (all green check marks on model tree), then you may ignore this message. If you run into convergence issues, then changing the Newton-Raphson option (Analysis Settings --> Nonlinear Controls --> Newton-Raphson Options) to Unsymmetric could be helpful.n
- March 27, 2021 at 5:59 am
  
  Mukka_Srikanth
  Subscriber
  
  Yeah it was helpful...thank you for detail answern

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