Creating a Strain Transformation

You can apply a strain transformation on one or several layers.

  1. From the Transformation section of the action bar, click Strain Transformation .
  2. Optional: Replace the default name Strain Transformation.n with a more significant one.
  3. Select the elements to strain.


  4. Select either the Machine Direction or the Cross Direction as the Strain Direction.

    The same strain direction applies to all straining zones.

  5. Specify Straining Zones. For each zone:
    1. Name the zone as required.
    2. Define the Straining Element where the strain ratio is applied.

    • Either create a sketch.

      For more information on working with the Sketcher, see 3D Modeling Core: Sketcher.

    • Or create a symmetry.
  6. Enter the Strain Ratio to apply.

    It can be above 100% (stretched) or under 100% (relaxed).

  7. Select or draw the zones to apply the strain ratio.

    1. Define the reference edge from the 3D area.

      By default, it is selected in the middle of the straining zone.

  8. Optional: Select the Mirror Zones for multi-domains layer check box, and a mirroring element.

The layers are automatically strained.



The length of layers without area, such as fold layers or elastic layers, is computed from the strain ratio.

For layers with an area, such as relation layers, liquid layers, mechanical bonds, stitching layers, the profiles are not strained. Only the spacing between profiles is modified.

For layers with an area but no profile, the area is extended, with a warning.

The Strain Transformation feature is a structure node aggregated under a Transformation Tools node. It contains:

  • The Straining Zones with their geometries.
  • A Symmetrical Definition Geometry Set, if any.