ABAQUS Volume II: I–Z - Manual (Page 161)

*MOHR COULOMB HARDENING
13.17 *MOHR COULOMB HARDENING: Specify hardening for the Mohr-Coulomb plasticity
model.
This option is used to define piecewise linear hardening/softening behavior for a material defined by the Mohr-
Coulomb plasticity model. It must be used in conjunction with the *MOHR COULOMB option.
Product: ABAQUS/Standard
Type: Model data
Level: Model
References:
•
“Mohr-Coulomb plasticity,” Section 18.3.3 of the ABAQUS Analysis User’s Manual
•
*MOHR COULOMB
Optional parameter:
DEPENDENCIES
Set this parameter equal to the number of field variable dependencies included in the definition of
the cohesion yield stress, in addition to temperature. If this parameter is omitted, it is assumed
that the cohesion yield stress depends only on the plastic strain and, possibly, 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.
Data lines to define Mohr-Coulomb hardening:
First line:
1. Cohesion yield stress.
2. Absolute value of the corresponding plastic strain. (The first tabular value entered must always
be zero.)
3. Temperature.
4. First field variable.
5. Second field variable.
6. Etc., up to five field variables.
Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than five):
1. Sixth field variable.
13.17–1
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