PROP_DAMAGE_JC
Material properties
*PROP_DAMAGE_JC
"Optional title"
did, erode, noic
$d_1$, $d_2$, $d_3$, $d_4$, $d_5$, $\dot\varepsilon_0$, $T_0$, $T_m$
$\varepsilon_{min}$
"Optional title"
did, erode, noic
$d_1$, $d_2$, $d_3$, $d_4$, $d_5$, $\dot\varepsilon_0$, $T_0$, $T_m$
$\varepsilon_{min}$
Parameter definition
Variable
Description
did
Unique damage identification number
erode
Element erosion flag
noic
Flag to turn off cracking along interface between different materials
$d_1$, $d_2$, $d_3$, $d_4$, $d_5$
Damage parameters
$\dot\varepsilon_0$
Reference strain rate
$T_0$, $T_m$
Reference and melting temperatures
$\varepsilon_{min}$
Minimum failure strain
Description
This is the Johnson-Cook failure criterion. The material will lose its shear strength pressure once the damage parameter, $D$, has evolved from 0 to 1. The damage growth rate is defined as:
$\displaystyle{\dot D = \frac{\dot\varepsilon_{eff}^p}{\mathrm{max}(\varepsilon_{min}, \varepsilon_f)}}$
where:
$\displaystyle{ \varepsilon_f = (d_1 + d_2 \cdot \mathrm{e}^{\frac{\vert d_3 \vert \, p}{\sigma_{eff}}}) \cdot (1 + d_4 \cdot \mathrm{ln}(\frac{\dot\varepsilon_{eff}^p}{\dot\varepsilon_0})) \cdot (1 + d_5 \cdot (\frac{\mathrm{T}-\mathrm{T}_0}{\mathrm{T}_m - \mathrm{T}_0}))}$
and:
$p = -(\sigma_{xx} + \sigma_{yy} + \sigma_{zz})/3$
