For this project, I recreate a slicing algorithm (notches included) following the quarter iso-grid structure pattern. Mike Sheldrake, one of the first to work on this pattern with a scientific approach, gave it the name of Quarter Iso-Grid. Look here for more information about this pattern: https://sheldrake.net/quarter_isogrid/.
This pattern has better structural properties than the standard squared waffle pattern because it gives a lot more rigidity and strength to the final object.
Furthermore, as other waffle structures, it allows a good compression strength due to the vertical orientation of the ribs and a good weight to strength ratio.
As I’m concerned by the weight, I wanted to improve this last property. I added a parametric perforation option to the algorithm in order to save weight. This is my contribution to this technology.
An unscientific list of volumetric masses obtained with my algorithm with different settings on different materials:
- C-Flute Corrugated Cardboard Thickness 4mm (not perforated):
Grid cell size 30mm = 57.53g/L
Grid cell size 40mm = 42.60g/L
Grid cell size 41mm = 41.73g/L
- C-Flute Corrugated Cardboard Thickness 4mm (perforated):
Grid cell size 40mm = 31.4g/L
- C-Flute Corrugated Cardboard Thickness 3mm (perforated):
Grid cell size 40mm = 27.7g/L
Volumetric mass of standard insulation styrofoam panels: 30g/L
Volumetric mass of an existing light mycelium composite: 45g/L
Below you’ll find some pictures about the construction process and pictures of the Grasshopper definition that I have made.
You can download it here.
cxlso – Parametric Quarter Iso-Grid Slicer – 2019