Various patterns relevant to our design concept are tested using Houdini FX and its intergrated physics simulators. The animations bellow present the results of the bending simulations when material properties are applied to the geometry.
Simulation 01 is a basic pattern that allows the understanding of the bending principles. the bending points are distributed in an exponential manner, with zero being the midpoint.
Following the logic from above Simulation 02 shows that the voronoid pattern can provide different bending results based on the testellation of the pattern. In this particular instace, voronoid shapes are applied in a gradient where the closer to the midpoint the larger the concentrattion of smaller voronoids. This testellation provides a controllable bending point.
Simulation 03 depicts a diamond pattern with its long side arranged vertical to the bending midpoint curve. Hence, bending is restricted.
Simulation 04 shows the same patterns arranged with its lond side parallel to the bending midpoint curve. Consequently, bending is allowed to a greater degree than simulation 03. It follows that the pattern orientation affects the bending properties of the material.
Simulation 05 is a combination of the above experimentations. The voronoid pattern is concentrated towards the bending point, which provides durability and strengthier connection with the panel
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Soon in the design phase we realized that we are creating a flexible transparent hinge design.
Next step in the design process is the design of the pattern onto the panel. A common issue that we had during the prototype_00 process was the durability of the silicon connection between the panels.
In order to integrate EPS with silicon, we needed to make sure that two materials are connected in a way that the friction is enough for them to resist the hinge sheer force. Inspired by the hexagonal shape of the module we looked into the growth pattern of snowflakes. With embedding the technique from Cliff Reiter’s brilliant paper called “A local cellular model for snow crystal growth”, we managed to create root like patterns which enable silicon to penetrate EPS and increase friction between two materials.
The connection was sometimes weak, and the silicon tended to either break at points or disconnect from the EPS panel. It is worth mentioning, however, that none of the connections failed.
The adhesive properties of silicon along with friction allowed a rigid yet flexible connection between the panels. However, we realized that sharp corners tended to rip the silicon apart.
The next step was to computationally design a pattern that would avoid sharp curves and grow organically on the panel itself.
<-transparency-porosity-tree growth-crystal growth-fractal>
// Pattern Growth Algorithm Animation