Gent¶
Module: solid
Category: material
Type string: "Gent"
Parameters¶
| Name | Description | Default | Units |
|---|---|---|---|
density |
density | 1 | [M/L^3] |
k |
bulk modulus | 0 | [P] |
pressure_model |
pressure_model | 0 | [] |
G |
G | 0 | [P] |
Jm |
Jm | 0 | [] |
Description¶
The uncoupled Gent material is defined using the Gent type string.
The strain energy of this material is defined via an uncoupled formulation,
\[
\Psi_{r}=\tilde{\Psi}_{r}\left(\tilde{\mathbf{C}}\right)+U\left(J\right)
\]
Here, the deviatoric strain energy is given by,
\[
\tilde{\Psi}=-\frac{\mu J_{m}}{2}\ln\left(1-\frac{\tilde{I}_{1}-3}{J_{m}}\right)
\]
Example:
<material id="2" type="Gent">
<G>3.14</G>
<Jm>1.5</Jm>
<k>1e5</k>
</material>