Fig. 3: Deformation mechanism of 3D printed self-locking thick-panel origami units.
From: Multimaterial 3D printed self-locking thick-panel origami metamaterials
a Geometric model of a self-locking origami unit. b The section view of self-locking thick-panel origami unit. c Illustration of the self-locking thick-panel origami unit under out-of-plane load with P2P deformation mode. d Self-locking thick-panel origami units with different geometric parameters. e FEA simulation results of three self-locking thick-panel origami units. (The color scale represents the logarithmic strain (LE) of the material ranging from 0 to 2.) f Snapshots of loading and unloading process of the three origami units under 50% compressive strain. g Nominal stress–strain curves of three origami structures. The filled area represents the absorbed energy before failure. h Snapshots of three origami unit with different materials and configurations. i Compressive tests to compare the SEA of the three origami units. j 3D design space map that distinguish the geometric parameter spaces from P2P, to intermediate or buckling deformation mode. Cut view of 3D design space map with k a = 25 mm, and l φ = 44°. (Circles, triangles and stars represent the self-locking thick-panel origami unit with buckling mode, intermediate mode and P2P mode, respectively.).
