jingyang (leo) liu

kirigami sphere

Kirigami geometry involves folding combined with the strategic placement of cuts. These cuts and holes not only simplify complex 3D geometries into 2D representations but also decrease stress concentrations on the surface of the 3D shape. In this project, a sphere was used as the base form, and a point cloud with gradient density was mapped onto its surface. Using these surface points, hexagonal cells of varying sizes were generated for circle packing, where each circle represented a foldable unit. To reduce pressure at the intersections of the folding lines, triangular cuts were introduced, allowing for smoother deformation.

The folding and unfolding processes were simulated prior to fabrication to ensure accuracy. The 3D sphere model was produced using both additive and subtractive methods. It was then unfolded into a 2D pattern, which was laser cut and reassembled into an 11-inch diameter sphere. Additionally, an 8-inch diameter version of the sphere was fabricated using selective laser sintering (SLS) technology. This approach demonstrates the integration of advanced digital techniques with kirigami principles to create complex, foldable structures.