Creating or Editing Iso-Thickness Areas

You can create iso-thickness areas (ITA) for an easier and quicker design. For example, define ITA to create an extended top surface used as reference surface for another ply group, or a top surface on an area with no plies, or on a limited area of the plies.

  1. Select a complete stacking or a selection of plies group.
  2. Do one of the following to select points to define the areas.
    • In the spinner under Point Defining Areas, enter the minimum width that makes an ITA selectable and click Compute and select areas wider than...
    • Select existing core sampling points. Multiselection is available.
      Tip: Although optional, selecting Imposed Thickness Points (ITP) helps manage ramps that do not follow a linear law, or ramps at the edge of the part.
    • Pick locations to indicate points.

      Save them in a dedicated work object.

    • Optional: Create more points with the context menu.
  3. For models not designed with a grid approach, define the Drop-Off Values to compute the bottom of slope.
  4. Optional: Select the Ignore ramp supports check box, when ramp supports have not been defined, or when they do not fit your requirements.
  5. Under More, select a contour or Composites geometry and the required method to create limits.
    • Iso-Thickness Area: Creates the ITA group only inside the selected area (one selection permitted). The top surface generated from this ITA group is limited by the contour or geometry.
    • No Thickness Area: Creates the ITA group with all the areas found inside the selected contour or geometry, even it the areas have no plies, thus no thickness with respect to the support surface. The top surface generated from this ITA group contains these areas with no thickness.
      Note: Make sure the Not Thickness Area does not intersect a ply contour.
  6. Still under More, extend the limits of the ITA area.
    • User Define: Select an Extended limit (Contour or Composites geometry), and an optional Start EOP (Contour or Composites geometry) to specify the side of the ITA to extend.
      Notes:
      • If you do not select a Start EOP, it is computed as the full ply boundary of all selected plies groups.
      • Start EOP and Extended limit are larger than all selected plies.
    • Auto: Enter an offset value (Extended limit and Start EOP are automatically computed).
      Notes:
      • The offset value cannot result in a top surface larger than the support surface.
      • Auto does not support multi-domains EOP.
  7. Under Other Outputs,
    1. Select the Generate shell boundaries check box.
      Shell boundaries are automatically computed for each iso-thickness area shell.
    2. Select the Generate offset surface check box.
      An offset surface is automatically computed for each iso-thickness area shell.
  8. Under Modifiers define an Additional thickness ratio.