Triple-saddle Caltrops

Guaranteed to be more painful to step on than legos! If you want to add some excitement to your marriage, scatter a handful next to your wife's side of the bed.

For novelty purposes only!

A saddle surface in a cube is dilated and unioned in three orientations to get the obvious symmetries and mask out very flat overhangs. About 14mm tall, but easy to change in OpenSCAD.

The arrays are constructed so that neighboring caltrops make contact halfway up to act as mutual support against nozzle forces at higher layers. The shrink parameter moves them closer together to make sure they print touching. You want them just touching, but not close enough to share perimeters.

This shape is very strong. These are printed out of Polymax PC and can take a huge amount of vertical load. Two perimeters with 0% infill. The inward-buckled faces probably support each other as load increases.

Tips turn out to be blunted into cube corners for further durability against challenging countermeasure