Poroelastic material using CAE

[bethluxmoore]

I want to assign a biphasic poroelastic material using CAE. I have isotropic permeability (k)and void ratio under permeability (material behaviour) and log bulk modulus, poisson's ratio and tensile limit under porous elastic (material behaviour).

However, every time I run the model it aborts with the error:
"PERMEABILITY HAS BEEN SPECIFIED BUT NO INITIAL VOID RATIOS HAVE BEEN DEFINED FOR THE POROUS MATERIAL"

I thought that I had defined this under permeability, is there any other way to define the initial void ratio?

Any advice will be greatly appreciated!

 

[xerf]

I suspect you need to use *INITIAL CONDITIONS, TYPE=RATIO (to provide initial void ratio for a coupled pore-fluid diffusion/stress analysis). (this is similar to providing an initial temperature field for a heat transfer problem.)