Hi There, Steve Mould’s latest video https://www.youtube.com/watch?v=vrOjy-v5JgQ is on bistable auxetic material, where he has a somewhat flexible material with slots cut into it such that the initially flat form will deform into a three-dimensional surface that is locally stable. He has examples …

search “auxetic” on this forum… https://discourse.mcneel.com/t/auxetic-expansion-and-simulation-of-deployable-structures/90895

Tian Chen actually did the work in Grasshopper! Here’s the reop with all the files: GitHub - UH-AIM/bistable-auxetic-surface-structures

Hi Steve, Clearly my ‘reek’ detector was spot on! Laughing my head off. Thank so much for replying and for pointing to the GitHub repository. I see the demo .gh files and will give it a whirl! And thank you also for all the work you put into your channel - I watch all of them! Bob

The history of the use of Grasshopper in auxetics work goes back more than 10 years. This blog post from 2012 was what lead to my collaboration with Mark Pauly and Keenan Crane that resulted in this 2016 paper https://dl.acm.org/doi/10.1145/2897824.2925944 (full paper available here )

Hi there, @bob.h.mackay , @Steve_Mould Did you manage to successfully output your own geometries into bistable cutting files? I am trying to get this working for a university project and would really appreciate any advice! How did you prep your input files? Did you manage to download the suggested…

Hi Catherine, I’m afraid I did not take this very far. I have a reasonably large CNC milling machine, but with the restriction to wood or perhaps aluminium, I don’t think I would get the necessary flexibility for this to work. In the longer term I am looking for a way to create minimal surfaces, su…

If you use the input files that’s supplied, you dont need BFF. What’s the error you got?

The design files work for me, but the GH script which allows one to visualize the auxetic mesh through the deployment stages (generation_aux_bass) is very broken (see attached screenshots). This is the error message I get from the BASS generation ghphythonscript: “1. Solution exception:‘NoneType’ …

Hi, I realise the script has a few errors. Firstly, the variable DBPath is spelled ‘DBPath’ on assignment and is referenced as ‘DBpath’ (lowercase p). Furthermore, the NoneType issue your experiencing is from the function RayRayIntersection, which checks for an intersection between two points (I as…

Steve Mould video on bistable auxetic material

Grasshopper

flixchameroy (Felix Chameroy) October 2, 2023, 3:25pm 3

You also have this thread with lots of nice insights from @DanielPiker : Kangaroo Bipartite

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Steve Mould video on bistable auxetic material

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