Hello,
I am currently writing my Masterthesis and I need help in modelling a viscoelastic material in ANSYS Mechanical. I don't know how exactly I should add my material properties in the Engineering Data field.
I experimentally measured the shear modulus G(t), and calculated the Bulk Modulus K(t) with the following formula: K(t) = 1/(3*(1-2nu)) * E(t), with E(t) = stress(t)/strain. - Attached, you can find an example with my data for G(t)-.
When I run my model with only this two Viscoelastic Test Data series, I get this error:
Elasticity is required, but is currently undefined.
I tried to add the required Isotropic Elasticity Property Data (Youngs Modulus and Poisson's Ratio) but when I run my model again, I get the same results as if I had only a Linear Elastic Material, it returns the same value. Ansys is not considering my viscoelastic property data I gave him.
Thank you and I hope You can help me!
Best regards,
Ioana
Hello Ioana,
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I don't quite follow what you tried. I agree, though, that you should have seen viscoelastic relaxation in your prediction if the parameters were proper.
I recommend that you get a free trial license for our MCalibration software. That software will give you more control over how you calibrate your viscoelastic material model.Â
Best of luck,
Jorgen
Hello Jorgen,
Thank you for your answer!Â
I am trying to simulate the deformation of a cylindrical sample, with viscoelastic properties, under a predefined force.Â
I want to define my material properties in Ansys Mechanical. I added 2 Data Series, Shear and Bulk Data vor my viscoelastic material and additionally the required Elasticity data (Young's Modulus and Poissons Ration).
As a result, I get the same Total Deformation for both cases, Elastic and Viscoelatic Properties.Â
I don't know where I should pay attention to.Â
I will have a look at the MCalibration tutorial as well.Â
Best regards,
Ioana Dan