Can I Calibrate a Viscoplastic Material Model to a Single Tension Curve?

[@endingpop]

Wouldn't you want to turn off the kappas (since there is no test constraining the bulk modulus) and ceps/fss (since there is no unloading data) too?

[@PolymerFEM]

Hi Marcus, yes, you are of course right. I fixed some of that up a big in my blog article...