Fabricating 3D Delaunay structure with joints in MDF

Replies to This Discussion

Permalink Reply by Joshua Seskis on October 8, 2011 at 2:31pm

Are you intending to make it from slender members or sheet members? I would personally recommend making a small paper model to help you visualise how the joints may work.

Permalink Reply by Metaphor guy on October 8, 2011 at 7:47pm

I am thinking of MDF sheets with no gaps between them.

Permalink Reply by Chris Tietjen on October 8, 2011 at 5:00pm

This is a start.  It notches both parts, panels and connectors to full depth so that needs to be modified.  Also it's set up to work in the C-plane so that's another limitation.

 

Chris

Attachments:

• DelauneyWaffle.gh, 12 KB

Permalink Reply by Metaphor guy on October 8, 2011 at 7:40pm

Hi Chris,

 

Thanks for the wonderful definition. It does create a delaunay waffle. Actually, I tried the delaunay mesh with another definition from a 2009 topic in the forum but the joints doesn't work (se attached). Where there are longer lengths (due to the delaunay geometry), the joints are still limited to a standard number of 2, this might not be structurally sound.

Attachments:

• fabrication 1.jpg, 542 KB
• Mesh_fabricator basic.ghx, 297 KB

Permalink Reply by Chris Tietjen on October 8, 2011 at 8:30pm

This is a better version of my earlier waffle definition in that it creates the half-depth notches and it's annotated.  You have to make sure that the panels don't intersect each other else the Booleans will fail.  Based on your initial reference to the waffle project I thought that waffles was where you were headed.  I wonder if it's difficult to assemble a waffle of triangles?  Probably not if the material can flex a little and the notches aren't too deep.

 

Chris

 

 

Attachments:

• DelaunayWaffle.gh, 18 KB

Permalink Reply by Metaphor guy on October 12, 2011 at 5:00am

Hi Chris,

Thanks for your very neat definition, it works perfectly. I will take some to time to understand the logic behind it. Meanwhile, I have a deadline to meet, will do some design experiments with this definition and post them here once I am free again.

 

Kent

Permalink Reply by dvdrbls on October 8, 2011 at 10:16pm

hi, i just downloaded the file and played with it, i move a couple things, see if it works for you, im using a primitive mesh from weavebird.

 

 

Attachments:

• Mesh_fabricatorbasic 2.gh, 12 KB

Permalink Reply by Metaphor guy on October 12, 2011 at 4:49am

Thanks David, I tried your definition, the curved corners look great now. However, I noticed the notches still look strange. I tried Chris' method of creating half-depth notch, not too successful, a little beyond me....see attched image.

Attachments:

• notches.jpg, 411 KB

Permalink Reply by Chris Tietjen on October 12, 2011 at 5:06pm

Kent,

This is the 'Mesh fabricatorbasic' definition with the half notching added.  I haven't looked at 'Mesh fabricatorbasic 2'.  Post again if you get stuck.

 

Chris 

Attachments:

• Mesh_fabricatorbasic.ghx, 285 KB

Permalink Reply by Metaphor guy on October 15, 2011 at 12:24am

Hi Chris,

Thanks heaps. Will test it out right away. Are you an architect or student btw? :)

 

Rgds,

Kent

Permalink Reply by Chris Tietjen on October 15, 2011 at 6:12am

Carpenter.  Student of Grasshopper.

Permalink Reply by Metaphor guy on October 15, 2011 at 12:51am

Hi Chris,

I noticed the boolean edge inside the circular disc is curved, is that for flexibility in the interlocking?

 

Kent

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