About Manufacturing Conditions and Geometrical Restrictions

For the topology optimization with SIMULIA Tosca Structure, it is possible to define constraints (DVCON_TOPO) that have a direct influence on the individual design variables (DV_TOPO). This allows the manufacturing restrictions or geometrical design aspects to be taken into consideration in the topology optimization.

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DV_TOPO
DVCON_TOPO

The different restrictions are listed below:

  • Frozen area
    • Element fixing by exclusion from the optimization group.
    • Element fixing by freezing elements (FROZEN).
  • Manufacturing control
    • Prevention of undercuts in the model (CAST).
      • Casting - the remaining structure can be produced by casting (MID_PLANE = POINT)
      • Forging - the remaining structure can be produced by forging (MID_PLANE = NONE)
      • Stamping - the remaining structure can be produced by stamping (MID_PLANE = STAMP)
      • Definition or automatic determination of the middle plane (MID_PLANE = AUTO)
      • Tightness of resulting structures (MID_PLANE = AUTO_TIGHT)
      • Alternative approach for demold constraints by parameterization of the design variables (FILTER_PARAM = YES)
  • Symmetry control
    • Area linking (LINK_TOPO)
    • Symmetry restriction (LINK_TOPO)
  • Member size control
    • Minimum member size control (MIN_MEMBER)
    • Maximum member size control (MAX_MEMBER)