Hello all,

Which test data-sets do I need to calibrate the viscoelastic material behavior of a polymer (independent of temperature)?

I do not have prior experience of working with polymers and specially with viscoelasticity. The source of material data is CAMPUSPLASTICS database, where we have besides other mechanical properties also various test diagrams. e.g. 

• Viscosity vs. Shear rate
• Shear stress vs. Shear rate
• Stress vs. Strain (Uniaxial)
• Secant Modulus vs. Strain
• Stress vs. Strain (Isochronous) for various time in hours
• Creep modulus vs. Time

Which of the above test data can be helpful/useful to describe the hyperelastic behavior including viscoelasticity?

I assume hyperelasticity for the Stress-Strain behavior. I used the Stress vs. Strain curve and could fit Yeoh Model upto an R^2 value of 0.998 which is a really good fit.

As per my limited knowledge and extensive research in internet, I could learn that the "Isochronous curves" can be useful for a creep analysis  but the question is how to extract Creep (Strain vs. Time) or Relaxation (Stress vs. Time) information out of the isochronous curves.

Thanks in advance for your valuable comments.

Regards

Muhammad