Required parameters
 DEFINITION

Set DEFINITION=COMBINED to define an unloading path based on the specified unloading curve and a transition slope to transition from the loading to the unloading curve.
Set DEFINITION=EXPONENTIAL to define an exponential unloading path.
Set DEFINITION=INTERPOLATED CURVE to define an unloading path based on an interpolation between the specified unloading curves.
Set DEFINITION=QUADRATIC to define a quadratic unloading path.
Set DEFINITION=SHIFTED CURVE to define an unloading path based on shifting the specified unloading curve to the point of unloading.
Optional parameters
 RATE DEPENDENT

Include this parameter to define ratedependent unloading data. If this parameter is omitted, the data are assumed to be rate independent. This parameter can be used only if the loading data are elastic and rate dependent.
Data lines for DEFINITION=COMBINED to define rateindependent unloading behavior that does not depend on independent components
 First line
Transition slope.
 Second line
Force or moment. (Provide the absolute value.)
Constitutive relative displacement or rotation. (Provide the absolute value.)
Temperature.
First 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.
Do not repeat the first data line. Repeat the subsequent data lines as often as necessary to define the unloading curve data.
Data lines for DEFINITION=COMBINED to define rateindependent unloading behavior that depends on independent components
 First line
Transition slope.
 Second line
Force or moment. (Provide the absolute value.)
Constitutive relative displacement or rotation. (Provide the absolute value.)
Constitutive relative motion in the first independent component.
Constitutive relative motion in the second independent component.
Etc., up to ${N}_{i}$ entries as identified on the loading data definition.
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.
Do not repeat the first data line. Repeat the subsequent data lines as often as necessary to define the unloading curve data.
Data line for DEFINITION=EXPONENTIAL and DEFINITION=QUADRATIC
 First (and only) line
Energy dissipation factor.
Permanent deformation factor. (Should be defined only in conjunction with the LOADING DATA, TYPE=PERMANENT DEFORMATION option.)
Data lines for DEFINITION=INTERPOLATED CURVE and DEFINITION=SHIFTED CURVE to define rateindependent unloading behavior (the RATE DEPENDENT parameter is omitted) that does not depend on independent components
 First line
Force or moment. (Provide the absolute value.)
Constitutive relative displacement or rotation. (Provide the absolute value.)
Temperature.
First 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 unloading curve data.
Data lines for DEFINITION=INTERPOLATED CURVE and DEFINITION=SHIFTED CURVE to define rateindependent unloading behavior (the RATE DEPENDENT parameter is omitted) that depends on independent components
 First line
Force or moment. (Provide the absolute value.)
Constitutive relative displacement or rotation. (Provide the absolute value.)
Constitutive relative motion in the first independent component.
Constitutive relative motion in the second independent component.
Etc., up to ${N}_{i}$ entries as identified on the loading data definition.
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.
Repeat this set of data lines as often as necessary to define the unloading curve data.
Data lines for DEFINITION=INTERPOLATED CURVE to define ratedependent unloading behavior (the RATE DEPENDENT parameter is included) that does not depend on independent components
 First line
Force or moment. (Provide the absolute value.)
Constitutive relative displacement or rotation. (Provide the absolute value.)
Relative velocity. (Provide the absolute value.)
Temperature.
First field variable.
Etc., up to four field variables.
 Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than four)
Fifth field variable.
Etc., up to eight field variables per line.
Repeat this set of data lines as often as necessary to define the unloading curve data.
Data lines for DEFINITION=INTERPOLATED CURVE to define ratedependent unloading behavior (the RATE DEPENDENT parameter is included) that depends on independent components
 First line
Force or moment. (Provide the absolute value.)
Constitutive relative displacement or rotation. (Provide the absolute value.)
Relative velocity. (Provide the absolute value.)
Connector relative position or constitutive relative motion in the first independent component.
Connector relative position or constitutive relative motion in the second independent component.
Etc., up to ${N}_{i}$ entries as identified on the loading data definition.
Temperature.
First field variable.
 If the number of data entries exceeds the limit of eight entries per line, continue the input on the next data line.
Repeat this set of data lines as often as necessary to define the unloading curve data.