Theory Manual Version 3.4
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Subsection 5.7.2: Exponential Isotropic Permeability Up Section 5.7: Hydraulic Permeability Subsection 5.7.4: Referentially Isotropic Permeability

### 5.7.3 Holmes-Mow

This isotropic material uses a strain-dependent permeability tensor as formulated by [36]: where, When , pore closure occurs as from above, in which case reduces to . Setting and produces a constant permeability. In the limit of infinitesimal strains,
The spatial tangent of the permeability tensor with respect to strain may be evaluated from (5.7.2-5) using
Subsection 5.7.2: Exponential Isotropic Permeability Up Section 5.7: Hydraulic Permeability Subsection 5.7.4: Referentially Isotropic Permeability