Applying a Restraint

To apply a restraint:

  1. In a study, do one of the following:
    • Right-click Fixtures and select from the options.
    • Click on Restraints on the Simulation toolbar.
    • Click Simulation > Loads/Fixture > Fixtures.
    The Fixture PropertyManager appears.
  2. Set Type to one of the following:
    Under Standard:
    Option Description
    Fixed Geometry  
    Immovable (No translation)  
    Roller/Slider The Roller/Sliding restraint specifies that a planar face can move freely into its plane but cannot move in the direction normal to its plane. The face can shrink or expand under loading.
    Fixed Hinge

    The Hinge restraint specifies that a cylindrical face can only rotate about its own axis. The radius and the length of the cylindrical face remain constant under loading. This condition is similar to selecting the On cylindrical face restraint type and setting the radial and axial components to zero.

    Under Advanced:
    • Symmetry
    • Cyclic Symmetry
    • Use Reference Geometry
    • On Flat Faces
    • On Cylindrical Faces
    • On Spherical Faces
  3. Select the model entities to which the restraint is applied.
  4. If you select Use Reference Geometry in step 2, select a valid entity for direction.
  5. In nonlinear studies and for restraints other than Fixed, Immovable, and Symmetry restraints, you can associate the selected restraint type with a time curve. Under Variation with time, do the following:
    1. Click Linear to use a default linear time curve, or click Curve then click Edit.
      The Time Curve dialog box opens.
    2. Enter a name for the time curve in the Name box.
    3. Enter the curve data points under the X and Y columns.
    4. Click OK.
  6. In the PropertyManager, click .