Auxetic Material (re-entrant structure)
A metamaterial that expands as it is stretched (normal materials contract). It therefore has a negative Poisson's ratio.
6
37
0
168
updated
April 14, 2026
Description
Auxetic materials expand as they are stretched. This re-entrant structure uses a bow-tie unit cell that is placed in a pattern. As for auxetic structures this is a simple one.
If you want to see the full 3D simulation (interactive viewer, open source) and the design explained, check out this blogpost!
Below is a short video of the material being stretched
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Model origin
The author marked this model as their own original creation.