This option can be used in conjunction with the *PLASTIC option (HARDENING=ISOTROPIC only), the *DRUCKER PRAGER HARDENING option, and/or the *CRUSHABLE FOAM HARDENING option to introduce strain rate dependence in the material models.
Products: ABAQUS/Standard ABAQUS/Explicit
Type: Model data
Level: Model
“Rate-dependent yield,” Section 18.2.3 of the ABAQUS Analysis User's Manual
“Classical metal plasticity,” Section 18.2.1 of the ABAQUS Analysis User's Manual
“Johnson-Cook plasticity,” Section 18.2.7 of the ABAQUS Analysis User's Manual
“Extended Drucker-Prager models,” Section 18.3.1 of the ABAQUS Analysis User's Manual
“Crushable foam plasticity models,” Section 18.3.5 of the ABAQUS Analysis User's Manual
In an ABAQUS/Explicit analysis this parameter is relevant only for TYPE=POWER LAW or TYPE=YIELD RATIO.
Set this parameter equal to the number of field variable dependencies in the definition of material parameters, in addition to temperature. If this parameter is omitted, it is assumed that the rate-dependent material behavior depends only on temperature. See “Specifying field variable dependence” in “Material data definition,” Section 16.1.2 of the ABAQUS Analysis User's Manual, for more information.
Set TYPE=POWER LAW (default) to specify the Cowper-Symonds overstress power law.
Set TYPE=JOHNSON COOK in an ABAQUS/Explicit analysis to specify Johnson-Cook rate dependence (this option must be used with the Johnson-Cook hardening model).
Set TYPE=YIELD RATIO to enter yield stress ratios.
If this option is used in conjunction with the *CRUSHABLE FOAM option, the static hardening relation must be defined on the *CRUSHABLE FOAM HARDENING option.
First line:
D.
n.
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 material parameters on temperature and other field variables.
First (and only) line:
C.
.
First line:
Yield stress ratio, 
.
Equivalent plastic strain rate, 
(or 
, the absolute value of the axial plastic strain rate in uniaxial compression, for the crushable foam model).
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 yield stress ratio on equivalent plastic strain and, if needed, on temperature and other predefined field variables.