Wildcard week

Week 17


ASSIGNMENT

  • Design and produce something with a digital fabrication process
  • (incorporating computer-aided design and manufacturing) not covered.
  • See also: complete assignment
    .

LEARNING EXPERIENCE

For this week, Denis, our instructor, asked us to work on metamaterials.

These are structures given to the material so that under a given constraint,
it deforms in a planned, programmed manner.
I tested models on CNC, 3 d printer, learned the use of resin.
I also used for the first time the lasercutter of Denis'lab.

FILES

metamaterials top F3D
metamaterials top DXF

metamaterials bottom F3D
metamaterials bottom DXF

GROUP ASSIGNMENT

This assignment is a part of a group assignment

FIRST TESTS

 We distributed the work and I had to work on a way to make a 2D metamaterial
that is made quickly and can be quickly modified.
Different solutions have been envisaged with Denis and Nicolas.

3D printing of a mold.
Much too long to print: more than 4 hours ...

CNC: same problem ....



Axel tested soluble PVA. The idea is to print the negative of the form,
to pour the resin and to dissolve the material after the drying of the resin.

Tests have been done on the UP of Denis' lab and at Digiscope, inconclusive ...

We worked on another idea.

We wanted to reproduce and test in a simple way this research by Physicists from FOM Institute AMOLF
and Leiden University together with colleagues from Tel Aviv University .
See part of the video here from 00:32 to 00:44.
The idea was to find metal cylinders and arrange them on a plexiglass plate,lasercut.
It is the fastest and most efficient technique for this type of form.
Cylinders are actually clams that exist in many dimensions.

DESIGNING A PARAMETRIC MODEL

 I drew the mold in Fusion by setting the basic dimensions: diameter, distance between, cylinders, kerf of the machine.
Little tip to remember: you have to take into account the 0.15 mm kerf that is placed outside the cut.








MOULD AND RESIN

 I cut out the two forms, the one in which the cylinders will be placed, and the one that holds the resin.



Once that was done, I entered the cylinders into the holes, leveled them, and then sealed the mold with paper.
I used elite double 8

. There is no particular safety rules for this product.

It is used in a 50/50 mixture, made with a precision balance.



Once the mixture is made, it must be poured in the form of a thin trickle so that there is the least air bubbles.

20 minutes of waiting to open the mould.





Here we are ...


It was a bit fragile on both sides. perhaps it would be necessary to increase the distance between the cylinders or I opened the mould too quickly ...



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