This option is used to specify the plastic part of the material behavior for elastic-plastic materials that use the crushable foam plasticity model. It must be used in conjunction with the *CRUSHABLE FOAM HARDENING option.
Products: ABAQUS/Standard ABAQUS/Explicit
Type: Model data
Level: Model
Set this parameter equal to the number of field variable dependencies included in the definition of the crushable foam parameters, in addition to temperature. If this parameter is omitted, it is assumed that the crushable foam parameters are constant or depend only on temperature. See “Specifying field variable dependence” in “Material data definition,” Section 9.1.2 of the ABAQUS Analysis User's Manual, for more information.
This parameter applies only to ABAQUS/Explicit analyses. Volumetric hardening is the only option available in an ABAQUS/Standard analysis.
Set HARDENING=VOLUMETRIC (default in an ABAQUS/Explicit analysis) to specify the volumetric hardening model.
Set HARDENING=ISOTROPIC to specify the isotropic hardening model.
First line:
, yield stress ratio for compression loading; 
. Enter the ratio of initial yield stress in uniaxial compression to initial yield stress in hydrostatic compression.
, yield stress ratio for hydrostatic loading; 
. Enter the ratio of yield stress in hydrostatic tension to initial yield stress in hydrostatic compression, given as a positive value. The default value is 1.0.
Temperature.
First field variable.
Second field variable.
Etc., up to five field variables.
Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than five):
Sixth 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 crushable foam parameters on temperature and other predefined field variables.
First line:
, yield stress ratio for compression loading; 
. Enter the ratio of initial yield stress in uniaxial compression to initial yield stress in hydrostatic compression.
, plastic Poisson's ratio; 
.
Temperature.
First field variable.
Second field variable.
Etc., up to five field variables.
Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than five):
Sixth 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 crushable foam parameters on temperature and other predefined field variables.