Rapid Deployment of Curved Surfaces via Programmable Auxetics (SIGGRAPH 2018)
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- Опубликовано: 8 сен 2024
- Siggraph 2018 Technical Paper
by Mina Konakovic-Lukovic, Julian Panetta, Keenan Crane, Mark Pauly
Webpage: lgg.epfl.ch/pub...
Deployable structures are physical mechanisms that can easily transition between two or more geometric configurations; such structures enable industrial, scientific, and consumer applications at a wide variety of scales. This paper develops novel deployable structures that can approximate a large class of doubly-curved surfaces and are easily actuated from a flat initial state via inflation or gravitational loading. The structures are based on two-dimensional rigid mechanical linkages that implicitly encode the curvature of the target shape via a user-programmable pattern that permits locally isotropic scaling under load. We explicitly characterize the shapes that can be realized by such structures---in particular, we show that they can approximate target surfaces of positive mean curvature and bounded scale distortion relative to a given reference domain. Based on this observation, we develop efficient computational design algorithms for approximating a given input geometry. The resulting designs can be rapidly manufactured via digital fabrication technologies such as laser cutting, CNC milling, or 3D printing. We validate our approach through a series of physical prototypes and present several application case studies, ranging from surgical implants to large-scale deployable architecture.
![[SIGGRAPH 2020] RoboCut: Hot-wire Cutting with Robot-controlled Flexible Rods](http://i.ytimg.com/vi/lLKI0HWV3dc/mqdefault.jpg)
This is basically where textiles and chemistry concepts meet. It totally reminds me of the tertiary structure of proteins being coded in the network structure of atoms and the resulting forces. really cool!
wow the gravity one really blew my mind
By attaching a balloon on each side and introducing a vacuum between them, you might be able to keep it inflated without needing to have a pressurized balloon on the inside. By cutting the structure in one piece from a sheet of rubber with spring-like, extendable joints, you might be able to save yourself the hassle of needing to connect all the elements with rings. You can even get rid of the solid parts. Just lay out nodes on a grid with their density according to how much curvature is needed in a given area, then connect them with spring-like, extendable joints which will set the distance between the nodes when deployed. This net-like structure won't be any more prone to entanglements as the existing design.
I could see an inflatable auxetic house becoming useful when exploring space
very cool. I think it needs to be applicable to compliant materials so that you could just laser cut them instead of connecting hundreds of linkages
Hell yeah another LGG EPFL upload!
I guess this might be a question: when inflating the sphere, the balloon naturally wants to form a sphere. How do we know that the triangle structure is achieving the target spherical shape when the balloon is already spherical?
Amazing concept!
Can structures designed this way carry load? Could the be made to be bistable and apply force on the boundaries?
Great stuff
Love it!
Amazing
Brilliant work, question. How long did this work take to complete to go from conception to implementation (theory, coding, testing)??
wait..i'm confused...if you put a balloon/bag inside of a cage & inflate it, it will obviously fill the shape of the cage..what am i missing here?
In this case, they use ballons, but an auxetic material can take a pre-defined shape without it. The goal is to I have a material that can take a precise shape.
@@Arkowne ah okay
Nice
Can you make something that pops out of the plane and extends out like a cliff or something (it isn’t defined as a function because there are multiple z coordinated defined given an xy coordinate)?
With this method maybe, but in general yeah they made a sphere so it doesn't seem that hard to make some "beak" kind of shape
I am not sure I understand the point on this? What kind of real world applications does this have?
The paper has a couple of potential real world applications.
what are they in a nut shell?
I don't know about what the paper says but I could imagine temporary structure erection? Art? You could make some pretty interesting things with this and LED triangles.
I see flowing furniture, custom harnesses, programmable structures. Imagination is what's needed now.
The last one could make for some nifty ceiling decorations in large public spaces.
I am so stnoed right now
nice. zip ties might be cheaper an easier.
3:03 do this in public in England and you get arrested for not showing your face
new jewish stadium
כן זה יכול להיות די נחמד אם יעשו כזה דבר
Ъ
lots of jewish stuff going on there. Splendid job.
what
Israel flag.
wtf are you talking about
@@idot3331 en.m.wikipedia.org/wiki/Star_of_David