Use this option in conjunction with the *FRICTION option to change the values of friction properties from step to step.
Product: ABAQUS/Standard
Type: History data
Level: Step
Use this parameter if the contact conditions have been modeled with contact elements or if friction is defined in connector elements. Set this parameter equal to the name of the element set containing the contact or connector elements for which the friction properties are being redefined.
Use this parameter if the contact conditions have been modeled with surface-based contact pairs. Set this parameter equal to the name of the *SURFACE INTERACTION property definition for which the friction properties are being redefined.
Set this parameter equal to the name of the amplitude curve (defined in the *AMPLITUDE option) that gives the time variation of the change in friction coefficients throughout the step (“Amplitude curves,” Section 19.1.2 of the ABAQUS Analysis User's Manual).
If this parameter is omitted, the change in friction coefficients is applied immediately at the beginning of the step or linearly over the step, depending on the value assigned to the AMPLITUDE parameter on the *STEP option (see “Procedures: overview,” Section 6.1.1 of the ABAQUS Analysis User's Manual). Changes in friction properties other than the value of the friction coefficient are always made immediately; if such changes are made when the frictional stress is nonzero, convergence difficulties may result.
Include this parameter to reset the friction properties to their original values. When this parameter is used, no *FRICTION option is needed to redefine the friction properties.