How to model a viscoelastic material on ANSYS?

I am a mechanical engineer in Turkey in senior year. As a graduation project I have to model soft tissue cutting operation by using ANSYS. The main aim in the project is;

1.Choosing
the correct material properties (SOLID,SHELL etc.) and correct
method( Prony Series or Generalized Maxwell for
viscoelastic)

2.Creating a cylindirical model as an example
and than creating the orginial model as a representation of the soft
tissue(in this case the tissue must be some living organ ex:liver )

3.By
using the contact modeling (I learned that it requires to have some
detailed experience in writing subroutine) dividing the material into
two parts or just creating a deformation by the effect of cutting  

The problem is my experience with
ANSYS is very very limited and with the aproaching deadline it is
becoming very overwhelming. Although I searched many resources from
many different sources, I couldnt find enough information to help me in
this project. I was wondering if you could help me in this project.
I am planing to chose 10 node SOLID 187 as a material type and create
an viscoelastic model. In the first step (on the cylindrical model
I just have to apply force and collect some data according to
deformation.).In the second step(after the completition of the model) I
have to write the contact subroutine for the cutting process.

I'll be very appreciated if you could guide me how to use the ANSYS properly in this project. Thanks for your all effort..

Regards