Learning Forum

[Wazawaki]

Hi,nI'm modelling a red blood cell and using a neo-Hookean material mode to describe the membrane. However, when I apply a stretching force to deform my model, it doesn't deform as much when compared to the experimental results. I'm thinking it might be a problem with the material I'm using. I'm using just the initial shear modulus and D1 parameter, is this all I need to create the material? nnAny suggestion will be greatly appreciated, thank you n

[1shan]

Hello Array,
Yes you are right, the initial shear modulus(mu) and material incompressibility parameter are the only 2 constants needed to define a neo-Hookean model. Are you referring any articles which have used neo-hookean model to simulate RBC deformation? Also, I am not an expert in biomechanics but I understand that RBC is a liquid capsule enclosed by a membrane. Are you modelling the liquid+membrane or just the outer membrane?
Regards,
Ishan.

[Wazawaki]

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1shan

Thank you for the reply, I'm getting the initial shear modulus from the literature I have attached a picture of what I'm using:

I'm planning to simulate it with and without the liquid inside.

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[Wazawaki]

Array
Sorry for another question, but I'm struggling to add fluid into the model. Would you be able to give me some advice on how to do so?
Thank you for the help!

[peteroznewman]

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Wazawaki

Here is one relevant discussion:

/forum/discussion/13075/fluid-contained-within-a-structural-volume

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[sadianoon]

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Wazawaki

im also trying to do same. did you done it?

my plan is also running the arteries with and without the fluid and planning for using FSI. Im using mooney rivlin model but im stuck.

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