How to pick the value of incompressibility parameter, D, when we want to add small amount of compressibility to the hyperelastic material?
March 17, 2023 at 9:00 amFAQParticipant
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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