This option is used with the Mises or the Johnson-Cook plasticity models
or the equation of state model to specify a tensile failure model and
criterion. It must be used in conjunction with the
PLASTIC, HARDENING=ISOTROPIC option; the
PLASTIC, HARDENING=JOHNSON COOK option; or the
EOS option.
Set this parameter equal to the number of field variable dependencies
included in the definition of the hydrostatic cutoff stress, in addition to
temperature. If this parameter is omitted, it is assumed that the hydrostatic
cutoff stress is constant or depends only on temperature.
See Material Data Definition for more information.
ELEMENT DELETION
Set ELEMENT DELETION=YES (default) to allow element deletion when the failure criterion
is met.
Set ELEMENT DELETION=NO to allow BRITTLE/DUCTILE-type failure for the deviatoric and hydrostatic parts of
stresses.
Required parameters for use with ELEMENT DELETION=NO
PRESSURE
Set PRESSURE=BRITTLE to model the case where the pressure stress is required to be
compressive when the failure criterion is met.
Set PRESSURE=DUCTILE to model the case where the pressure stress will be limited by
the hydrostatic cutoff stress when the failure criterion is met.
SHEAR
Set SHEAR=BRITTLE to model the case where the deviatoric stresses will be set to
zero when the failure criterion is met.
Set SHEAR=DUCTILE to model the case where the deviatoric stresses will be
unaffected when the failure criterion is met.
Data lines
to specify a tensile failure model
First line
Hydrostatic cutoff stress (positive in tension). (Units of
FL−2.)
Temperature.
First field variable.
Second field variable.
Etc., up to six field variables.
Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than six)
Seventh field variable.
Etc., up to eight field variables per line.
Repeat this set of data
lines as often as necessary to define the dependence of hydrostatic cutoff
stress as a function of temperature and other predefined field
variables.