Truncated Rhombicuboctahedron Bead
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Truncated rhombicuboctahedron as hollow bead. With 100, 110, 111, and 211 it features all major crystallographic faces.
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A truncated rhombicuboctahedron as a hollowed out bead. https://en.wikipedia.org/wiki/Truncated_rhombicuboctahedron
This convex polyhedron is special in that it features all the main crystallographic planes
100, 110, and 111. Plus the 211 planes that lie between adjacent 111 planes.
This body came up when investigating nodes for frame systems.
For an octet-truss the 111 faces (blue in the image) are the relevant faces since these are the faces that are normal to truss rods. The 111 faces (yellow) point to the tetrahedral voids in the truss (threefold symmetric). The 100 faces point to the octahedral voids in the truss (fourfold symmetric). The odd 211 faces are relevant because these are the ones lying in the angular center between any two adjacent 111 faces.
111 space-frame see here:
https://www.printables.com/model/430606-111-spaceframe-demo
Print Settings
Rafts: No
Supports: No
Infill: 33%
Category: Other