Fig. 1
From: Origami-based tunable truss structures for non-volatile mechanical memory operation
Geometry of triangulated cylindrical origami (TCO). a Folding motion of the TCO. b The flat sheet with crease patterns consisting of mountain crease lines (a shown as blue solid lines) and valley crease lines (b shown as red dashed lines). c Truss version of the TCO, where all facets are removed and crease lines are replaced by linear springs with a spring constant of k. d Modified truss structure for the fabrication of physical prototypes. e–h Graphical illustrations of four different TCO configurations (upper row) and digital images of their physical prototypes (lower row) (scale bar 100 mm). Their initial configurations are (h 0, θ 0) = (90 mm, 46°), (150 mm, 40°), (140 mm, 92°), and (119 mm, 0°) from left to right
