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General Mechanical

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How to model a bimodular material in Mechanical

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    • September 3, 2025 at 3:59 pm
      matthew.fig
      Subscriber

      Hello,

      I have a linear elastic metal which has different values for elastic modulus in compression and tension. How can I set up a material model to cover this material?

       

      Thank you.

    • September 4, 2025 at 2:16 am
      Shashidhar Reddy
      Ansys Employee

      Hello,

      I dont think there is a saperate model for this.

      You need to use hyperelastic models that can use different stress and strain curve in both tension and compression.

      However, if the material is not incompressible, you can use compressible hyperelastic model like ogden foam material model.

      In this model, beta value can be calculated from poisson ratio using the following formula
      (beta= nu/(1-2*nu)
       
      Regards
      Shashidhar, PhD
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