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Material Properties

Material Properties

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  3. How to pick the value of incompressibility parameter, D, when we want to add small amount of compressibility to the hyperelastic material?

How to pick the value of incompressibility parameter, D, when we want to add small amount of compressibility to the hyperelastic material?

Tagged: 19, hyperelasticity, materials, mechanical, structural-mechanics
    • March 17, 2023 at 9:00 am
      FAQFAQ
      Participant

      The incompressibility parameter, D, is nothing but 2/(initial bulk modulus). If you wish to add small amount of incompressibility (large but finite bulk modulus), then adding a small value for D will do it. Note that the parameter D has the units of 1/stress. So, if the initial shear modulus of the material is, say 2.5 MPa, then a value of 1e-2 MPa^-1 would be a reasonable value for D.

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