View source for Stiffest possible infill

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Provenly stiffest possible infill! <br>
'''This paper:''' <br>
"Mechanical metamaterials at the theoretical limit of isotropic elastic stiffness". <br>
https://www.nature.com/articles/nature21075 <br>
doi: 10.1038/nature21075

'''The foam achieves the so called Hashin-Shtrikman upper bounds on isotropic elastic stiffness.''' <br>
There may be other foams that perform equally well but there provenly cannot be any foams that perform better.

This could be used as an infill. Both <br> 
for today's 3D printing and <br>
for future [[piezomechanosynthesized]] structures.

It is a superposition of simple cubic infill with an <br>
octahedral infill (octet truss with filled in faces) of halve the size. <br>
A "cubic-octahedral" infill - so to say.

For overhang free FFF-prnting (or mechanosynthesis) <br>
The orientation can be chosen such, that <br>
no planes are coplanar to the print-bed. <br>
This is on the cost of a bit of the symmetry of the whole block.

{{wikitodo|Add images}}

== Misc ==

Trademarked by some party as "isomax".

== Related ==

* [[Octet truss]]

== External links ==

* https://www.thingiverse.com/thing:2797168 – stiffest possible infill – by mechadense February 17, 2018
* https://www.thingiverse.com/thing:2168370 – Cubic Octet Foam Element – by hmikelson March 10, 2017

Related discussion: <br>
(sorry, sunsetted) https://plus.google.com/+NicholasSeward/posts/hDYhP91YNph