Bistable auxetic surface structures (BASS) is a free and open source application for the generation of the fabrication patterns of morphing structures. BASS allows users to directly specify the shape of a deployed 3D surface, and generates a flat Kirigami pattern that when deployed, transforms to that specified surface. These patterns are 2D in nature and can be fabricated in a number of ways including laser cutting. We used rubber sheets from Trodat (Aero+) and a laser cutter from Trotec (Speedy 360) to physically fabricate the demos.
The BASS application is based on the paper, “Bistable auxetic surface structures” by Tian Chen, Julian Panetta, Max Schaubelt and Mark Pauly: https://doi.org/10.1145/3450626.3459940
This repository contains the design algorithm (using Rhinoceros 3D + grasshopper interface, https://www.rhino3d.com/) to generate the cut pattern for user supplied input geometries. It has a number of pre-programmed surfaces for demonstration and fabrication.
Boundary first flattening is necessary to pre-process custom input geometries by computing their conformal map: https://geometrycollective.github.io/boundary-first-flattening/
Tian Chen
Julian Panetta
[Max Schaubelt]
Mark Pauly
The algorithm is described in the paper (see .bib file in the repo):
Bistable auxetic surface structures
Chen, Panetta, Schaubelt, Pauly
ACM Transactions on Graphics