Porous Media Swelling

The moisture swelling material model can be either isotropic or anisotropic. You can use moisture swelling in the analysis of coupled wetting liquid flow and porous medium stress.

Isotropic

You specify the volumetric swelling data:


Input Data	Description
Swelling strain	Volumetric moisture swelling strain, $ϵ^{m s}$ .
Saturation	Saturation, $s$ . This value must be in the range $0.0 \leq s \leq 1.0$ .

Anisotropic

You specify the volumetric swelling data and the anisotropic swelling ratios:

Table 1. Volumetric Swelling Data
Input Data	Description
Swelling strain	Volumetric moisture swelling strain, $ϵ^{m s}$ .
Saturation	Saturation, $s$ . This value must be in the range $0.0 \leq s \leq 1.0$ .

Table 2. Anisotropic Swelling Ratios
Input Data	Description
r11	Anisotropic swelling ratio, $r_{11}$ .
r22	Anisotropic swelling ratio, $r_{22}$ .
r33	Anisotropic swelling ratio, $r_{33}$ .