The Prescribed Displacement node adds a condition where the displacements are prescribed in one or more directions to the geometric entity (domain, boundary, edge, or point).

Define the prescribed displacements using a Standard notation (the default) or a General notation.

To define the displacements individually, click the Standard notation button.

Select one or all of the Prescribed in x direction, Prescribed in y direction, and for 3D components, Prescribed in z direction check boxes. Then enter a value or expression for u0, v0, and for 3D components, w0. For 2D axisymmetric components, select one or both of the Prescribed in r direction and Prescribed in z direction check boxes. Then enter a value or expression for u0 and w0.

Click the General notation to specify the displacements using a general notation that includes any linear combination of displacement components. For example, for 2D components, use the relationship

For the H matrix H, select Isotropic, Diagonal, Symmetric, or Anisotropic and then enter values as needed in the field or matrix. Enter values or expressions for the R vector R.

For example, to achieve the condition u = v, use the settings

which force the domain to move only diagonally in the xy-plane.

To display this section, click the Show button () and select Advanced Physics Options.

Physics Tab with Solid Mechanics selected:
Domains>Domain Constraints>Prescribed Displacement
Boundaries>Solid Mechanics>Prescribed Displacement
Edges>Solid Mechanics>Prescribed Displacement
Points>Solid Mechanics>Prescribed Displacement