Shell Structure form finding(something wrong with the springs component for kangaroo)

Replies to This Discussion

Permalink Reply by peter fotiadis on October 26, 2015 at 2:32am

ExoW demo (not mine) using native GH Components. It could be modified to deal with organic tubes.

Attachments:

• Truss_Node_Fusion_V3.gh, 12 KB

Permalink Reply by peter fotiadis on October 26, 2015 at 2:41am

ExoW demo ("close" to your case, but not exactly) using GH Components and Topologizer.

It doesn't address the make-it-in-real-life puzzle but it's an indication of what type of meshes can expect (if you choose to work with meshes: not my recommendation)

Attachments:

• VOR-ON-SURF-PETER_V5.3dm, 556 KB
• VOR-ON-SURF-PETER_V5A.gh, 138 KB

Permalink Reply by peter fotiadis on October 26, 2015 at 2:52am

Simpler Voronoi VS a box/surface using GH Components: that could yield something realistic (but requires a lot of work) when self supporting modules are the way to go (not my recommendation).

Spot the temperamental ExoW behavior (the "engulfing" node issue)

Attachments:

• VOR-ON-BOX_V1.gh, 16 KB
• VOR-ON-SURF-PETER1.gh, 23 KB

Permalink Reply by peter fotiadis on October 26, 2015 at 3:03am

Far more complex case using ("almost", he he) GH Components that works ... when it works, I mean rather "rarely" he he (ExoW reports "engulfing" node issues and makes balloon type of meshes instead of the expected thing).

This def supposedly does variable thickness "volume trusses" depending on attractors (push/pull).

Note: this fef is replaced with C# that does "organic" Breps (not meshes) as struts and joins and it works in all situations ... but this is a very complex thingy.

Attachments:

• Variable_thicken_with_ExoW_V1.gh, 66 KB

Permalink Reply by Nazanin Tabatabaei on October 26, 2015 at 12:43pm

first of all,I am so jealous that nothing seems impossible for u to design!

second,as you have said,this types of joints and struts seems impossible,I guess the V2 (our own triangle shapes)will work better than all the other examples for my case,specially if I have to make them with foam and plastic molds.Also making trusses is kinda out of the time and the purpose of this class.so back to what we had yesterday...

aslo the voronbox-v1 definition looks good and realistic,since it is not using the complicated trusses.but as you said it is tough since I have to figure out if it can really stand on it self or will fall apart.this defenition and also the v2 triangle definition look possible to be made by cutting foam.the only thing that will be left is to find the shape of the pavilion with different volumes for different purposes ,insteead of just using a simple shape like box.and the more important part is the joints between each of these modules,maybe a male,female join..

yesterday,(instead of learning grasshopper,hehe)I took my time to look for some examples to gather my thoughts to see what I wanna do,apparently well my first option is to use foam with the v2 definition,and just design some male-female joints..and the second option is going thiner(by using the resin mold on the foam and simply using some type of aluminum rivets or some type of interlocking joint)...like these photos 

Permalink Reply by peter fotiadis on October 26, 2015 at 1:06pm

Given the "1 week" factor (is this true?) I believe that within a year you could start doing some WOW (real-life) things - it's just a matter of time.

Back to topic: So for a variety of "realistic" constrains you think that V2 fulfills the scope. If so ..

1. I'll make the female/male capability plus the ability to automatically bake these things in corresponding layers.

2. I'll make the required connectivity tree (and explain what this is) that is required in order to assemble the thing.

3. I'll provide to you tons of sand paper for the obvious, he he. I mean Deep Space Science is a good thing (rounded lips, TSplines and other mysterious things) but in some occasions ... nothing beats the manual way.

Moral: get the Styrofoam and some compatible adhesive - use gloves (and don't forget that sandpaper).

Permalink Reply by Nazanin Tabatabaei on October 26, 2015 at 1:21pm

btw im trying to open some of your files,and i get this error,when i try to download  them from food4rhino,it seems that I cant find those plugins named here

and thank you alot for helping meee,

and yeah I feel like the v2 version and also the vorthe box seem to be more realistic,but you have more experience and u know better what works better.

a little information on my self: I loved mathematics and for all years of my bachelor in architecture I was thinking of changing my major,but I recently learnt about parametric design,scripting and the softwares...and I guess that is quite what I always wanted,I just don't have any experience yet,that's why it is really hard for me at the moment,but hopefully in future,with enough knowledge I get to do what I want.

p.s: I hate sanding:((((((((((((

Permalink Reply by peter fotiadis on October 27, 2015 at 1:27am

ExoW: http://www.grasshopper3d.com/group/exoskeleton

Topologizer: http://www.grasshopper3d.com/profiles/blogs/topologizer-network-cle...

Love mathematics: then ... start making plans for crossing the Rubicon (ii.e. some programming language [I would strongly recommend C#] > the Dark Side > years of pain + tears > hell or heaven?).

Back to that pile or worms of yours (I hate "simple" cases, he he).

0. if you want rounded lips ... Styrofoam is the only solution (+ sanding [buy a mask and some decent cigars ... path is long and hilly]). if not > goto 5/6.

1. by what means you think that you can shape Styrofoam? Do you have access to some CNC foam cutter? Or the only tools that you have are ... 2 hands and a knife?  (or a thermal cutter). Accuracy is a BIG issue here: chances are that panels won't "fit". Solution is available in the forthcoming V3.

2. male "protrusions" on Styrofoam is kinda 3rd marriage > AVOID at any cost > this would end up in tears.

3. female ones are safe ... thus we need a proper "insert stripe" that must be compatible with the Styrofoam adhesive and strong enough to hold the pieces until the glue cures (it takes time, there's no instant Styrofoam adhesives around). Maybe aluminum (hard to cut by hand) or balsa (very expensive) or plywood (best option).

4. Some CNC foam cutters they can't shape the female "crevices" > be prepared (a thermal tool may(?) cut the mustard).

Note: panels made with Styrofoam look miserable because reality and theory differ. They also look miserable as well (and kitsch and miserable).

5. making the panels with (marine) plywood ... well this yields far superior accuracy and therefor aesthetics but (a) yields max panel thickness constrains, (b) introduces max panel dimensions constrains (c) yields packing issues [waste material] and (d) requires a totally different "connection" approach: it doesn't make sense to do some female crevice ... unless the plywood is very thick (expensive + heavy).

Note: Designing (pro option) self supporting "rib" reinforced sandwich composite panels ... well this is a bit far and away from what you can handle at present time.

So ... I've suspended the male/female thingy until you decide the final policy: it's the material/detailing that should dictate the method(s) AND the whole design and not the other way.

This is what we call bottom-top design approach (dinosaur Architects follow the top-bottom: disastrous + naive + naive + naive + avoid).

6. Plan ZZTop: make a stand alone autonomous perimeter frame per panel (marine plywood: imagine "thickening" these abstract beams shown inwards per panel) then  join these frames by means of bolts (easy) and fill the "gaps" with Styrofoam (hmm). Note: you can reinforce the frames by a variety of means (say: a secondary "beam" sub-structure) achieving a rather elegant all overall solution.

This is the best solution by roughly 666 miles. 

 

Permalink Reply by Nazanin Tabatabaei on October 27, 2015 at 9:01am

hi,

I don't know why I cant reply to ur last comment(there is no reply button)!!!,in fact I feel like I cant see it all,so I can't even see the uploaded file at the end of it...:(so if u can copy and paste it again...

-bytheway yes I have access to cnc,and also hot wire cutter which is used for styrofoam 

I gotta go to school,will be back to u in few hours,and I will read your post carefully.

Permalink Reply by peter fotiadis on October 27, 2015 at 12:54pm

I'm re-starting this from "node" 0 since the nesting is rather limited (that's the reason that you can't reply).

Here's a "home-made" join that hopefully is cheap enough for such an Academic project ... in case that single (not self supporting tri-frames [as outlined in my previous reply - N6]) plywood mini-beams are the choice (ugly Styrofoam "fills" the triangle's interior). This solution obviously is not waterproof and a bit crude (gaps in the nodes) ... but this is Academic anyway, so why bother?

PS: Beam main axis of symmetry must lay in a plane that is defined by the current edge and the sum of unitized vectors that derive from the adjacent mesh faces per mesh edge (2 or 1 in case of perimeter faces).

PS: I do hope that you know how to exploit (Model Tree, Dynamic Sections et all) 3dPDF content. 

Attachments:

• Triangle_panels-join-001_home_made.pdf, 260 KB

Permalink Reply by Nazanin Tabatabaei on October 28, 2015 at 1:57pm

unfortunately I can't open the pdf filee:(

Permalink Reply by Nazanin Tabatabaei on October 28, 2015 at 2:48pm

I guess I take a few days to do some scaled samples,to determine the material that I want to use and so the design approach,one thing I know for sure is that I am using one material,so using the wood frame is off the table...

btw if you can send again the joints I would really appreciate it,because the other pdf looks empty.

once again hank you for your help

• ‹ Previous
• 1
• 2
• 3
• Next ›
• Page