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SURFACE BEHAVIOR
18.47
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SURFACE BEHAVIOR: Define alternative pressure-overclosure relationships for
contact.
This option is used to modify the default hard contact pressure-overclosure relationship in a mechanical
contact analysis. Mechanical interactions normal to the surfaces are influenced by this option. It must be
used in conjunction with the
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SURFACE INTERACTION option or in an ABAQUS/Standard analysis with
the
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GAP option or the
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INTERFACE option. By default, ABAQUS/Standard will determine whether the
contact constraint will be enforced with or without a Lagrange m ultiplier. You can use the
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CONTACT
CONTROLS option to override the default.
Products: ABAQUS/Standard ABAQUS/Explicit
Type: Model data in ABAQUS/Standard; Model or history data in ABAQUS/Explicit
Level: Part, Part instance, A ssembly, Model in ABAQ US/Standard, Step in ABAQUS/Explicit
References:
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“Mechanical contact properties: overview,” Section 30.1.1 of the ABAQUS Analysis User ’s Manual
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“Contact pressure-overclosure relationships,” Section 30.1.2 of the ABAQUS Analysis User’s Manual
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CONTACT CONTROLS
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GAP
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INTERFACE
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SURFACE INTERACTION
Optional, mutually exclusive parameters:
AUGMENTED LAGRANGE
This parameter applies only to ABAQUS/Standard analyses with a default “hard” pressure-
overclosure relationship.
Include this parameter to choose the augmented Lagrange method for enforcement of the
contact constraint. See “Constraint enforcement methods for ABAQUS/Standard contact pairs,”
Section 29.2.3 of the ABAQUS Analysis User ’s Manual, for a discussion of the default penalty
stiffness and penetration tolerance associated with this method (the default penalty stiffness used
by this m ethod is often stiffer than that with the straight penalty method). You can specify or
modify the penalty stiffness on the data line.
PENALTY
This parameter applies only to ABAQUS/Standard analyses with a default “hard” pressure-
overclosure relationship.
Include this parameter to choose the penalty m ethod for enforcement of the contact constraint.
See “Constraint enforcement methods for ABAQUS/Standard contact pairs,” Section 29.2.3 of the
18.47–1
ABAQUS Version 6.1 Module:
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