This past week I have been working on physically creating auxetic cell array dicussed in my past blog post. To manufacture these cell arrangments I decided to use the following materials: cardstock, Polyethylene terephthalate (PET), and Polyeurethane rubber. (Images present the materials in that order). The rubber displays the expected auxetic behavior the most out of all three materials. The reason that cardstock was chosen as a material is because it is a more accessible and cheaper than compared to the other two material choices. Rubber was chosen because it has elastic properties which were hypothesized to be good for auxetic structures. PET was used because it is more rigid than paper and we have lots of it in the lab.


Chiral Square:



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