Specify softening
regularization for the clay plasticity model and the soft rock plasticity
model.
This option is used to specify a regularization scheme to mitigate
potential mesh dependence of results in models that exhibit strain localization
with increasing plastic deformation. It can be used only in conjunction with
the
CLAY PLASTICITY or the
SOFT ROCK PLASTICITY option.
Set this parameter equal to the number of field variable dependencies, in
addition to temperature, included in the definition of softening
regularization. If this parameter is omitted, the softening regularization
behavior may depend only on temperature.
TYPE
Set TYPE=POWER LAW (default) to define the regularization behavior in terms of
the crack band length, ;
exponent, ;
and bound on the magnitude of regularization, .
Data lines to define softening regularization
First line
Crack band length, .
This value must be greater than zero.
Exponent, .
This value must be greater than zero.
Bound on the magnitude of regularization, .
This value must be greater than zero.
Temperature.
First field variable.
Etc., up to four field variables.
Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than four)
Fifth 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 the softening
regularization data on temperature and other predefined field
variables.