Stiff deployable structures via coupling of thick Miura-ori tubes along creases
arxiv(2023)
摘要
Origami-based structures play an important role in the realization of
deployable mechanisms and unique mechanical properties via programmable
deformation by folding. Among origami-based structures, tessellation by the
coupling of origami tubes enriches the variations in geometry and mechanical
properties. However, thickness accommodation is a critical problem in
engineering applications involving the coupling of thick origami tubes. To
solve this problem, this study proposes the coupling of thick Miura-ori tubes
along the creases for facile fabrication, which sustains the
one-degree-of-freedom (DOF) motion of thick Miura-ori tubes owing to the local
mirror symmetry around the coupling interfaces. Furthermore, the coupling
method contributes to the high stiffness of the coupled Miura-ori tubes, as
evidenced by the wide gap in the eigenvalues between the one-DOF mode and the
elastic modes obtained by the bar-and-hinge models. Finally, meter-scale
coupled Miura-ori tubes were fabricated to demonstrate one-DOF motion and high
stiffness. The findings of this study enable the rapid construction of
structures by one-DOF motion and enhancement of transportability via
flat-foldability.
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