Prescribed Displacement (on Domains)
The Prescribed Displacement node adds a condition where the displacements are prescribed in the selected domain.
Coordinate System Selection
The constraints are applied in the axis directions of the coordinate system selected in this section. You should only use a coordinate system that has fixed spatial directions.
Prescribed Displacement
Constrain the displacement component to a given value. Enter a scalar value for the components of the prescribed displacement u0.
Constraint Settings
To display this section, click the Show More Options button () and select Advanced Physics Options in the Show More Options dialog.
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
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Excluded Surfaces, Excluded Edges, and Excluded Points
When Individual dependent variables is selected in the Apply reaction terms on list, the constraint forces are applied directly on the degrees of freedom, which are the displacements along the global coordinate axes. If you use this setting together with a local coordinate system, the results will be inconsistent since the constraint forces will not match the constraint orientation.
Location in User Interface
Context Menus
Solid Mechanics, Explicit Dynamics > Domain Constraints > Prescribed Displacement
Truss, Explicit Dynamics > Line Constraints > Prescribed Displacement
Ribbon
Physics tab with Solid Mechanics, Explicit Dynamics selected:
Domains > Domain Constraints > Prescribed Displacement
Physics tab with Truss, Explicit Dynamics selected:
Edges > Line Constraints > Prescribed Displacement