General Mechanical

General Mechanical

Hyper-elastic Mooney-Rivlin Model Constants

    • OmidNazeri1997
      Subscriber

      Hi everyone.

      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 have 2 questions:

      1) Which value should i choose for the D1 (incompressibility) constant? Could (D1=0) be a proper value for ligaments or something near zero?

      2) How can i enter the strain rate value for the constants? there is no place inside the engineering data module to enter this parameter.

      Thank you in advance for any help.

    • peteroznewman
      Subscriber

      I inserted the image that is linked to above.

      • OmidNazeri1997
        Subscriber

        Hi Peter, Thanks.🙏

    • OmidNazeri1997
      Subscriber

      Hi there. I Considered using (D1 = 0) for this material model, but i face errors (convergene errors, an internal solution magnitude was exceeded errors and etc.) at the solution status. I really need help and i will share the details and screenshots if needed. please help me! 😤

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