Antisymmetry
The Antisymmetry node adds an edge (3D), boundary (2D), or point (2D and 3D) condition that defines an antisymmetry edge, boundary, or point.
Coordinate System Selection
The Global coordinate system is selected by default. The Coordinate system list contains any additional coordinate systems that the model includes. The coordinate system is used in conjunction with the Axis to use as normal direction setting.
Antisymmetry
Select an Axis to use as normal direction. This specifies the direction of the normal to the antisymmetry plane.
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For 2D models, select 1 or 2 for the first or second axis, respectively.
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For 3D models, select 1, 2, or 3 for the first, second, or third axis, respectively.
Constraint Settings
To display this section, click the Show button () and select Advanced Physics Options.
In the COMSOL Multiphysics Reference Manual:
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Constraint Reaction Terms
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Weak Constraints
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Constraint Settings
Symmetry Constraints
You can activate and deactivate this boundary condition by assigning it to a constraint group. See Load Cases in the Structural Mechanics Modeling chapter.
Location in User Interface
Context Menus
 Truss>Line Constraints>Antisymmetry (Line)
 Truss>More Constraints>Antisymmetry (Point)
Ribbon
Physics tab with Truss selected:
Edges>Line Constraints>Antisymmetry
Points>More Constraints>Antisymmetry