Hyperelastic Material – Uniform Reduced Integration vs. Enhanced strain formulation

- February 28, 2019 at 8:19 pm
  
  zjuv9021
  Subscriber
  
  Hello,
  
  Could someone with experience in dealing with modeling nearly incompressible materials explain the pros/cons and differences in utilizing the Uniform Reduced Integration with hourglass control (keyopt,matid,2,1) versus Enhanced Strain Formulation (keyopt, matid, 2,2) for SOLID185 elements? Also, for URI, the notes from sharcnet indicate to measure the ratio of the artificial energy to total energy and ensuring this is less than 5%. Can someone please explain, in the ANSYS mechanical interface, where I can do this calculation? I see Stabilization Energy and strain energy only.
  
  Kind regards,
  
  Zach
- March 1, 2019 at 1:51 am
  
  Sandeep Medikonda
  Ansys Employee
  
  Zach,
  
  I thought, I probably shared this article with you before, if not, Please see this blog.
  
  Mechanical automatically chooses the formulation for you based on a wide number of factors but you can force it (not typically recommended) using the key options as you specify.
  
  Stabilization energy is nothing but artificial energy. I also strongly recommend you to use ANSYS Help.
  
  Regards,
  Sandeep