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Non linear material properties Ansys Mechanical.

Non linear material properties Ansys Mechanical.

Non linear material properties Ansys Mechanical.

(OP)
Hi everyone,
I am working with Ansys Mechanical and I need to create a non linear material.
I want this material to have some orthotropic propoerties but I also want one direction to be non linear.
Actually what I would like to have is a material with non linear properties on one axis and different properties on the orthogonal directions.
Can someone help me with this ? I can also use Workbench if it is easier to define.
Thank you

Sincerely
Thibault

RE: Non linear material properties Ansys Mechanical.

Hi

This will depend on what type of nonlinear response you want to describe. I'm not an ANSYS user but I'm pretty sure anisotropic elastic-plastic and hyperelastic material models are available? I would check the materials section of the documentation.

Good luck,
Dave

RE: Non linear material properties Ansys Mechanical.

(OP)
Hi Dave,
Thank you for your answer.
The nonlinear response is the response of a ligament to some traction with a "toe region" from 0 to 0.06 of deformation where the curve is quadratic and after 0.06 it is linear. Also I want a very small compression modulus. Actually I wish it would follow this graph attached.
And you are right, hyperelastic and anisotropic models are available but I do not know how to combine both because if I use an anisotropic model, it is linear and the thing with the hyperelastic model is that they do not fit my curve like I would like to...

RE: Non linear material properties Ansys Mechanical.

Hi,
Have you tried all the available hyperelastic models? None fit the curve like you would like?

RE: Non linear material properties Ansys Mechanical.

(OP)
Hi,
I did try those hyperelastic models but I was not happy with the result. However my supervisor told me that it is fine for what we wanted to do.
Thank you very much for your answers.

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