Abaqus Contact Step Control Parameters dialog box

Name	Defines the name of the modeling object.
Label	Specifies a unique numerical identifier for the modeling object.
Description	Lets you specify a description for the modeling object.
Specific Contact Pair
Apply Controls to a Specific Contact Pair	Lets you apply the parameters to a contact pair.
Master Surface	Appears when the Apply Controls to a Specific Contact Pair check box is selected. Lets you select the master (contacting) surface in the pair. This source face defines the direction for the contacts that get created. Select an existing region or click New Region to create a new region. See Region dialog box.
Slave Surface	Appears when the Apply Controls to a Specific Contact Pair check box is selected. Lets you select the slave (contacted) surface in the contact pair. Select an existing region or click New Region to create a new region.
Contact Stabilization
Ignore Stabilization	Controls whether the software ignores stabilization.Select the Ignore Stabilization to address situations where rigid body modes exist as long as contact is not fully established. You can then specify damping in the normal and tangential directions based on the stiffness of the underlying mesh and the time step size.Clear the Ignore Stabilization check box if you want Abaqus to automatically calculate the damping coefficient.This option corresponds to the STABILIZE parameter for the *CONTACT CONTROLS keyword.
Tangential Damping Fraction	Lets you specify the fraction of the damping in the tangential direction. This value should be a fraction of the damping in the normal direction. By default, the tangential and normal stabilization are the same.
Stabilization Damping Coefficient	Lets you control the stabilization damping coefficient the software uses.Select Default to use the default value for the damping in the normal direction.Select User Specified to specify the damping in the normal direction.
Scale Factor for Default Damping Coefficient	If you select Default from the Stabilization Damping Coefficient, lets you specify the scale factor.
Damping Coefficient	Lets you specify the damping coefficient to be used in the contact interface. The value you specify overrides the damping coefficient calculated by Abaqus.
Ramp-down Factor	Lets you specify the damping that remains st the end of the step. By default, this value is 0. Set the value to 1 to keep damping constant over the step.Note: If you enter a nonzero value, convergence problems may occur in a subsequent step if stabilization is not used in that step.
Damping Range	Lets you control how the clearance at which the damping becomes zero is defined.Select User Specified if you want to specify the clearance.Select Default Clearance to have the clearance calculated by Abaqus based on the facet size associated with the contact pair.
Clearance at Which the Damping Becomes Zero	If you select User Specified from the Damping Range list, lets you specify the clearance at which the damping becomes zero. You can specify a large value if you want to obtain the damping independent of the opening distance.
Augmented Lagrange Surface Behavior
Stiffness Scale Factor	Lets you specify a parameter equal to the factor by which Abaqus scales the default penalty stiffness to obtain the stiffness values used for the contact pairs.
Modify Penetration Tolerance	Select this option if you want to modify the penetration tolerance for the step.
Penetration Tolerance	Lets you specify whether you want to define an absolute or relative tolerance for penetration.
Absolute Penetration Tolerance	Specifies a distance that defines the absolute penetration tolerance.
Relative Penetration Tolerance/	Lets you specify penetration tolerance as the ratio of the allowable penetration to the characteristic contact surface face dimension.
General Contact Controls
Automatic Penetration and Separation Tolerances	Select this option to have Abaqus automatically compute an overclosure tolerance and a separation pressure tolerance to prevent chattering in contact.
Enforce Constraints with Non-Default Lagrange Multipliers	Controls whether Abaqus enforces the contact constraints with Lagrange multipliers.
Lagrange Multiplier	Appears when the Enforce Constraints with Non-Default Lagrange Multipliers check box is selected. Select Yes to enforce the contact constraints with Lagrange multipliers. Select No to enforce the contact constraints without Lagrange multipliers. This option is not recommended for problems with a high stiffness since it may lead to numerical problems during equation solution (such as singularities).
Friction Onset	Controls when friction is included in the increment.Select Immediate to apply friction in the increment when contact occurs.Select Delayed to apply friction to the increment after contact occurs.

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Abaqus Contact Step Control Parameters dialog box, Simcenter 3D 2021.1 Series

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