ABAQUS Volume II: I–Z - Manual (Page 409)

*SHEAR FAILURE
18.11 *SHEAR FAILURE: Specify a shear failure model and criterion.
This option is used with the Mises or the Johnson-Cook plasticity models to specify shear failure of the
material.
It must be used in conjunction with the option *PLASTIC, HARDENING=ISOTROPIC or
JOHNSON COOK.
Product: ABAQUS/Explicit
Type: Model data
Level: Model
References:
•
“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
•
“Dynamic failure models,” Section 18.2.8 of the ABAQUS Analysis User’s Manual
•
*PLASTIC
Optional parameters:
DEPENDENCIES
This parameter is relevant only for TYPE=TABULAR.
Set this parameter equal to the number of field variable dependencies included in the definition
of the equivalent plastic strain at failure, in addition to temperature. If this parameter is omitted,
it is assumed that the strain at failure depends on the plastic strain, the plastic strain rate, the
dimensionless pressure-deviatoric stress ratio and, possibly, on temperature.
See “Using the
DEPENDENCIES parameter to define field variable dependence” in “Material data definition,”
Section 16.1.2 of the ABAQUS Analysis User’s Manual, 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 the element to take hydrostatic compressive stress
only when the failure criterion is met.
TYPE
Set TYPE=JOHNSON COOK to define the Johnson-Cook shear failure criterion. It requires the
use of the *PLASTIC, HARDENING=JOHNSON COOK option.
Set TYPE=TABULAR (default) to define the failure strain in tabular data form. It requires the
use of the *PLASTIC, HARDENING=ISOTROPIC option.
18.11–1
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