Viscoelasticity

[fxue]

Hi guys,
I am trying to model the viscoelastic behaviour of a tested material. In Abaqus, I used Prony under time domain to assign viscoelastic properties. When I tested it with two different loading rates, I didn't see much change from force-deflection curve. My question is if this is due to the fact that I used time domain, not frequency domain? I thought either time or frequency domain is just a way to assign viscoelasticity, and therefore, the material should behave rate-dependent anyway (as one of viscoelastic natures). Am I right?

Many thanks,
Michael

 

[Elabbasi]

Time domain should work. Either you put incorrect viscoelastic properties (wrong relaxation time or moduli) that don't cause significant viscoelasticity or you did a static analysis. You should do a quasi-static (VISCO) or dynamic time domain analysis.

Nagi Elabbasi
Veryst Engineering

 

[fxue]

Thanks, Nagi. I think I made a mistake using the static analysis. Thanks very much for your help.

Michael

 

[afefdridi]

HELLO
please how can i calculate the prony parameters for viscoelastic material
thanks a lot