This option is used to define friction forces and moments in connector elements.
Products: Abaqus/Standard Abaqus/Explicit Abaqus/CAE
Type: Model data
Level: Model
Abaqus/CAE: Interaction module
Include this parameter to specify predefined friction behavior (if available for the connection type). Abaqus defines the contact forces and the magnitude of the tangential tractions automatically, as illustrated in “Connection-type library,” Section 31.1.5 of the Abaqus Analysis User's Guide.
Set this parameter equal to the stick stiffness associated with frictional behavior. If this parameter is omitted, a default value (which usually is appropriate) is chosen.
Set this parameter equal to the connector's component of relative motion for which user-defined frictional behavior is specified.
Omit this parameter and use the *CONNECTOR POTENTIAL option in conjunction with the *CONNECTOR FRICTION option to specify coupled user-defined frictional behavior.
Set this parameter equal to the name of the associated *CONNECTOR DERIVED COMPONENT option or the number of the connector component of relative motion that defines the friction-generating contact force.
Set this parameter equal to the number of field variable dependencies included in the definition of the connector friction data, in addition to temperature. If this parameter is omitted, it is assumed that the friction forces and moments or the contact normal force contributions are independent of field variables. See “Specifying field variable dependence” in “Material data definition,” Section 21.1.2 of the Abaqus Analysis User's Guide, for more information.
Set EXTRAPOLATION=CONSTANT (default unless *CONNECTOR BEHAVIOR, EXTRAPOLATION=LINEAR is used) to use constant extrapolation of the dependent variables outside the specified range of the independent variables.
Set EXTRAPOLATION=LINEAR to use linear extrapolation of the dependent variables outside the specified range of the independent variables.
Set INDEPENDENT COMPONENTS=POSITION (default) to specify dependencies on components of relative position included in the frictional behavior definition.
Set INDEPENDENT COMPONENTS=CONSTITUTIVE MOTION to specify dependencies on components of constitutive relative motion included in the frictional behavior definition.
This parameter applies only to Abaqus/Explicit analyses.
Set REGULARIZE=ON (default unless *CONNECTOR BEHAVIOR, REGULARIZE=OFF is used) to regularize the user-defined tabular connector friction data.
Set REGULARIZE=OFF to use the user-defined tabular connector friction data directly without regularization.
This parameter applies only to Abaqus/Explicit analyses.
Set this parameter equal to the tolerance to be used to regularize the connector friction data.
If this parameter is omitted, the default is RTOL=0.03 unless the tolerance is specified on the *CONNECTOR BEHAVIOR option.
First (and only) line:
First parameter used to specify predefined friction, as illustrated in “Connection-type library,” Section 31.1.5 of the Abaqus Analysis User's Guide.
Second friction parameter.
Etc., up to as many friction parameters discussed in “Connection-type library,” Section 31.1.5 of the Abaqus Analysis User's Guide.
No data line is required for connection type SLIPRING.
First line:
Internal contact force/moment generating friction.
Accumulated slip.
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 internal contact force as a function of accumulated slip, temperature, and field variables. Omit these data lines if internal contact forces do not need to be specified.
First line:
First independent component number (1–6).
Second independent component number (1–6).
Etc., up to entries (maximum six).
Subsequent lines:
Internal contact force/moment generating friction.
Connector relative position or constitutive relative motion in the first independent component identified on the first data line.
Connector relative position or constitutive relative motion in the second independent component identified on the first data line.
Etc., up to entries as identified on the first data line.
Accumulated slip.
Temperature.
First field variable.
Second field variable.
If the number of data entries exceeds the limit of eight entries per line, continue the input on the next data line.
Continuation line (if needed):
Third field variable.
Etc., up to eight entries per line.
Do not repeat the first data line. Repeat the subsequent data lines as often as necessary to define the internal contact force as a function of connector relative position or constitutive relative motion, accumulated slip, temperature, and other predefined field variables.