Application of failure criteria to viscoelastic materials

[Gekko12]

TL;DR

Failure criteria of viscoelastic materials.

I was wondering if someone can explain how failure criteria work when dealing with viscoelastic materials.
I'm quite new to this, so I only know how they work with brittle and ductile materials. (not in too much detail either).

And now that I'm at it anyway, if possible an explanation on failure criteria with respect to viscoelastic composites
(human tissue in specific) would be great :)

 

[jrmichler]

Have you tried an internet search? I searched Failure criteria of viscoelastic materials, and found many good hits.