perm-const-iso¶
Module: biphasic
Category: materialprop
Type string: "perm-const-iso"
Parameters¶
| Name | Description | Default | Units |
|---|---|---|---|
perm |
perm | 1 | [L^4/F.t] |
Description¶
The material type for constant isotropic permeability is \perm-const-iso.
This isotropic material model uses the biphasic theory for describing the time-dependent material behavior of materials that consist of both a solid and fluid phase 1.
When the permeability is isotropic,
\[
\mathbf{k}=k\,\mathbf{I}
\]
For this material model, \(k\) is constant. Generally, this assumption is only reasonable when strains are small.
Example:
<permeability name="Permeability" type="perm-const-iso">
<perm>0.001</perm>
</permeability>
-
Mow, V.C., Kuei, S.C., Lai, W.M., and Armstrong, C.G., "Biphasic creep and stress relaxation of articular cartilage in compression: Theory and experiments", J. Biomech. Eng. 102 (1980), pp. 73-84. ↩