Fig. 9
From: Thermal crumpling of perforated two-dimensional sheets
Two-step crumpling transition in an anisotropic sheet. The zig-zag pattern of approximately vertical struts reinforced by edge-sharing triangles make this structure more rigid in the vertical than in the horizontal direction (see highlighted example in the figure). We show snapshots of thermalized configurations for several temperatures. As T increases, the anisotropy in the pattern of perforations makes the membrane first fold into a tight cylinder, before crumpling completely. This geometry corresponds to the system labeled Pattern 3 in Fig. 3 and in Supplementary Fig. 1. The T = 0 snapshot a is a close-up to a 30a × 30a section of the lattice, while the finite-temperature snapshots b show the full 100a × 100a system
