General Mechanical

General Mechanical

Knee Joint Simulation (Hyper-elastic Mooney-Rivlin)

    • OmidNazeri1997
      Subscriber

      Hello. I need to use the 5 parameter Mooney-Rivlin model to simulate the hyper-elastic behavior of the human ACL. I've found a related article, which describes the model constants. Here is a picture indicating the table of coefficients:  https://drive.google.com/file/d/1s2rwXOtdA8km24B52031RqN7wNZLEguU/view?usp=sharing

      I exactly implemented the similar setup and material properties for all of the model components. Here is the link to the related discussion (Mr. Saumadeep helped me solve the issues): https://forum.ansys.com/forums/topic/knee-joint-simulation-new/

      ((But, this time hyper-elastic material instead of linear elastic material for the ACL tissue.))

      Unfortunately, i face error and warning messages during solution. Here you can see all of the messages:

      Can anyone help me with these?

      Thanks.🙏

    • OmidNazeri1997
      Subscriber

      I'm using the ANSYS 2022 R2 student version.

      Also, you can see a picture of the analysis settings here:

    • SaiD
      Ansys Employee

      Hello. You seem to be encountering an "Excessive element distortion error". You may find helpful tips in the following video to resolve the issue:

      How to Handle Element Distortion Errors in Hyperelastic Materials — Lesson 3 - ANSYS Innovation Courses

      Hope this helps!

       

    • OmidNazeri1997
      Subscriber

      Hi SaiD. Thank you so much!

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