Epoxy modelling

[Shion]

Dear all,
I intend to use the hyperelastic material model (1st trial will be neo-Hookean model) to model the epoxy surrounded by an enclosed shell. The epoxy is in liquid state but I still choose this model with the assumption that the volume is conservative (no leakage of the epoxy out of the shell). Is it correct? If it is correct, is there any link between the parameters in the hyperelastic material to the properties of the epoxy (such as viscosity)? I mean, if based on the experimental data set 1, I use hyperelastic material to model the epoxy and matching to find the parameter value of the material model, later when I change the epoxy, can I predict the value for parameter of the new model based on the properties of the changed epoxy?
Rgrds.

[Jorgen]

You can certainly try to use a neo-Hookean model to represent the epoxy. I am concerned, however, with the accuracy of that material model if the epoxy stays in a liquid state. I would be more tempted to use a viscoelastic model.

I do not see a direct way to convert between viscosity and the neede shear modulus in the NH model.

- Jorgen

[Shion]

Hi Jorgen,

The reason that I want to use neo-Hookean model is this is only a submodel so that I can put it into a main one. The main model will be time-independent. I just want to use NH to model at a sufficient accurate level so that when I put them into the main model, things will be ok.

Regds,
Shion

[Jorgen]

OK, sounds good.

- Jorgen