I'm been trying out FEBio as a potential new vehicle for our poroelastic cartilage models (currently in Abaqus), especially with an eye toward contact models. I have a few questions I was hoping someone could clarify for me:
--In PostView, is the "pressure" output the fluid pressure, or the hydrostatic pressure component of the solid matrix stress tensor? (-1/3*trace(S))
--What is the default treatment for the fluid phase at free poroelastic surfaces? Is it necessary to apply a 0-pressure nodal constraint to enforce free-draining surfaces?
--Related to the above, how is the fluid flow handled at the contact interface? It appears to be a sealed-at-contact algorithm?
--Finally, in Abaqus it is necessary to apply an initial void ratio, or water content, but I can't find any mention of that here. Is that not necessary for the FEBio formulation?
Thank you in advance for any response. My first impression is that this program is an outstanding advance for poroelastic modeling, and contact specifically.
--In PostView, is the "pressure" output the fluid pressure, or the hydrostatic pressure component of the solid matrix stress tensor? (-1/3*trace(S))
--What is the default treatment for the fluid phase at free poroelastic surfaces? Is it necessary to apply a 0-pressure nodal constraint to enforce free-draining surfaces?
--Related to the above, how is the fluid flow handled at the contact interface? It appears to be a sealed-at-contact algorithm?
--Finally, in Abaqus it is necessary to apply an initial void ratio, or water content, but I can't find any mention of that here. Is that not necessary for the FEBio formulation?
Thank you in advance for any response. My first impression is that this program is an outstanding advance for poroelastic modeling, and contact specifically.
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