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Lattice with Varied Density
You can create lattice with varied density.
User Interface Location: Click Model > Engineering > Lattice.
Release: Creo Parametric 4.0
Benefits and Description
You can watch a video that demonstrates this capability.
You can create lattice with varied density for the 3D Lattice type. The density is defined by reference geometry. Thicker beams with a bigger cross section size create a higher density of material. When the beams are thicker, the balls on the beams become larger, too. In the example below, you can see the difference between cross section size of the beams and the size of the balls as you move away from the center.
A volume region is defined by the references and the value of Distance:
The reference can be located in the center of the volume region, defined by one of its boundaries, or located outside of the lattice volume. References can be a combination of surfaces, quilts, edges, vertex, curves, curve ends, axes, points, and coordinate systems.
The size of the volume region is defined by the Distance. For points, the volume region is in a shape of a ball around the point, where the value of the range is its radius. For curves, the volume region is a cylindrical sweep around the curve, where the value of the range is its radius. For surfaces, the volume region is defined by surfaces that are offset to the surface on both sides, by the value of the range.
 Lattice with Varied Density where Distance is set to 20 Lattice with Varied Density where Distance is set to 40 In this example, the distance is smaller. The bigger beams and larger balls occupy a small volume region along the internal edges of the part. In this case, a curve is the reference. In this example, the distance is bigger. The bigger beams and larger balls occupy a big volume region. The reference in this case is a flat surface at the right of the part.
You can set the lattice to fill only a partial volume of the entire volume. To determine when the lattice propagation stops, set the minimal beam size. By default, the minimum beam size is set to 0 and all the lattice cells are created. Or, provide a value greater than zero but less than the biggest beam diameter to create a lattice in the reinforced portions only. See the example below: