Dear all,
I want to do coupled analysis(pore fluid/stress) in abaqus. I use a umat subroutin for define my material (that is soil). other hand I want to use void ratio in permeability. I define permeability in material but I want to use void ratio in my subroutin and the void ratio can changed and dont be constant during run. Do anybody know, how can I changed void ratio with my variables defined in umat?
Of course, I tried to use user field variables, but in window of Pearmibilty there isnt icon of "number of field variables" and I couldnt define "field" for void ratio.
Thanks for your help,