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Contraction of a cell on a gel

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Hi!

I created a 2D axisymmetrical model to examine the deformation of a (stem) cell on a (polyacrylamide) gel after contraction.

In order to do so, I should define a prestress over a part of the cell (the cytoplasm). However, since the cytoplasm is made up of a hyperelastic Neo-Hookean material, it is not possible to define a prestress -I used "Initial stress"- in a way it is possible for a linear elastic material (also, when applying linear elastic materials, the model does only converge for a positive prestress, so radially outward, instead of radially inward as in a contraction).

What could cause the model to not converge for a radially inward prestress?

And is there any other way to define a prestress for a Hyperelastic Material, to imitate contraction?

Thank you in advance!



0 Replies Last Post 22 mag 2019, 10:25 GMT-4
COMSOL Moderator

Hello M. Steggink

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