PROP_DAMAGE_XW
Material properties
*PROP_DAMAGE_XW
"Optional title"
did, erode, noic
$c_1$, $c_2$, $c_3$, $c_4$, $n$
"Optional title"
did, erode, noic
$c_1$, $c_2$, $c_3$, $c_4$, $n$
Parameter definition
Variable
Description
did
Unique damage identification number
erode
Element erosion flag
noic
Flag to turn off cracking along interface between different materials
$c_1$
Damage parameter
$c_2$
Damage parameter
$c_3$
Damage parameter
$c_4$
Damage parameter
$n$
Damage parameter
Description
This is the Xue-Wierzbicki failure criterion. The material will fail once the damage parameter, $D$, has evolved from 0 to 1. The damage growth rate is defined as:
$\displaystyle{ \dot D = \frac{\dot\varepsilon_{eff}^p}{\varepsilon_f}}$
where $\varepsilon_f$ is the failure strain, defined as:
$\displaystyle{ \varepsilon_f = c_1\cdot exp(-c_2\cdot \eta) - \left( c_1\cdot exp(-c_2\cdot \eta) - c_3\cdot exp(-c_4\cdot \eta)\right)\cdot\left(1-\theta^{1/n}\right)^n}$
The failure strain is a function of stress triaxiality, $\eta$, and lode parameter, $\theta$.
