Convergence Difficulty

- November 18, 2019 at 7:52 am
  
  kulkarni16
  Subscriber
  
  Hello,
  
  I am doing simulation of a part made of Hyperelastic material subjected to thermal loading. I encounter an error message as- 'Element ... (and maybe other elements) has become highly distorted....'. The error repeats several times until few substeps converge and the solution finally stops. I have already tried the following settings- Reducing mesh size in the distorted region, reducing sub step size, using hexadominant & tetrahedral elements, using reduced integration. But I still receive the error right from the first substep. I have attached the project here. I will appreciate any help to solve this problem.
- November 18, 2019 at 1:31 pm
  
  Aniket
  Forum Moderator
  
  Sorry, ANSYS employees on the forum are not allowed to download files. So hopefully other members of the community might chime in!
- November 18, 2019 at 4:00 pm
  
  peteroznewman
  Subscriber
  
  kulkarni16,
  
  There are keyopts that need to be set to help the solver converge with hyperelastic material and the element integration should be set to Reduced Integration.
  
  You can also improve the mesh by using a Sweep on the hyperelastic part.
  
  You didn't say what version of ANSYS you are using. I did this in ANSYS 2019 R3 and the node count is 39k, which is over the Student limit of 32k.