Auxetic re-entrant honeycomb simulation

Hi everyone,

I am working on a project for my master thesis and I am trying to simulate the bending of a 2D pattern extruded in Z direction (see the images to understand) when compressive forces are applied on the sides.
I've tried in different manners but still I cannot reach any reliable outcome.
Does someone has any idea of how to do it?

I think that the bars undergoes different kind of forces, someone of them is twisted and someone remains rigid: this is the difficult part of the simulation for me.

I know that Daniel Piker did some great work on auxetic structures but I cannot find something similar to compare and rely on.

Here attached the .gh file and the image.

Thank you very much!

Lorenzo