Abstract
Rigid origami is a branch of origami with great potential in engineering applications to deal with rigid-panel folding. One of the challenges is to compactly fold flat a polyhedron made from rigid facets with a single degree of freedom. In this paper, we present a new method to design origami cubes with three fundamental characteristics: rigid foldability, flat foldability and one degree of freedom (DOF). A total of four cases of crease patterns that enable origami cubes with distinct folding performances have been proposed, which covers all possible layouts of the diagonal creases on the square facets of origami cubes. The folding utilises spherical linkages formed by intersecting creases, and based on the kinematic equivalence between the rigid origami and the spherical linkages, the corresponding spherical linkage loops are introduced and analysed to reveal the motion properties of the origami cubes. The newly found method can be readily utilized to design deployable structures for various engineering applications including cube-shaped cartons, small satellites, containers, etc.
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