Hi Mr.Jorgen and all members

I am working on material Polypropelene . software: Ansys

I am considering Viscoelastic property.In that the experiment (i thought)required to be done is either 1 or 2

1.Tensile test relaxation data (strain is fixed and stress varies)

2.Creep Test(stress fixed strain varies)

CASE 1:

If I consider the relaxation data i will calculate the shear modulus by dividing modulus by 3

Using this data i want to apply in PRONY (shear response) in Ansys.

I know only this approach suggest me regarding other approaches(Maxwell,curve fitting)

CASE 2: I dont know how to approach this in Ansys

Please Help me in choosing the right way.