MIT aeroMorph project Dear experts, I am trying the inflation simulation with Kangroo2 recently, but the inflated cloth simply inflates without bending like what showed in the picture. This project can be understood like this: they used 2 same clothes with TPU coating on a side facing each other,…

Actually it seems that it doesn’t even really need any nudge - the symmetry breaks naturally without further input, just the direction in which it buckles is random. inflate_weld2.gh (19.7 KB) If you wanted to include something to make it buckle one way instead of another it could be done with a l…

This thread might be helpful [image] Non Uniform Plastic Inflation Simulation (Kangaroo2) Grasshopper It looks like the main thing you need to change is adding some bending stiffness to the sheet. Without this it will just round out at the seams. Here’s a comparison of w…

Hi Daniel, thanks for your reply. I have seen this before. However, It seems they did not realize the bending phenomenon. Or am I missing something?

the bending I mean is being folded like the crane in the picture. or like the angled object in this picture [trackr-media]

This one is more like what you describe. [image] Inflatable pillow with sticked triangle Kangaroo So something like this? inflate_weld.gh (14.1 KB) [image]

I really appreciate this. Close but it still has some distance from my goal. In reality, the folding action is autonomous instead of an outer force like a hand. I changed the file a bit: in my case the welded area is stiff so I used rigid points. The problem is that the bending or folding is not a…

My wild guess is that the folding action is due to unbalanced force( they possibly be balanced when in the same planar, but when the forces get a bit noise force the balance break . Under the influence of the forces they come into a new balance and that postion is angled. I have no idea whether it …

Yes - that’s in the paper you linked at the start - it describes that symmetry breaking coming from the welding process. In the definition above it reproduces the geometry from the paper after you give it a little nudge in one direction to break the symmetry. Adding the asymmetry of the welding pr…

Wow! That is truly amazing! You are my lifesaver ~ ~ Now I really get it! [image]

I get a new bottleneck: the calculation gets really slow if the mesh has many faces( in some cases the welded patterns are complicated ). Is there any way to speed up this calculation? Thanks a lot.

At the moment the main thing you can do is to choose the largest edge length for the the mesh that can capture the features, so it’s not too dense. Note that in the last file I shared this edge length was set as an absolute value, so if you make a shape many units across you’d end up with a very den…

Inflation simulation with bending

Grasshopper Kangaroo

DanielPiker (Daniel Piker) August 19, 2021, 12:23pm 3

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Inflation simulation with bending

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