Locking mechanisms in degree-4 vertex origami structures. Fang, H., Li, S., Xu, J., & Wang, K., W. In Proc. SPIE 9799 Active and Passive Smart Structures and Integrated Systems, volume 1, pages 979910, 4, 2016.
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Origami has emerged as a potential tool for the design of mechanical metamaterials and metastructures whose novel properties originate from their crease patterns. Most of the attention in origami engineering has focused on the well- known Miura-Ori, a folded tessellation that is flat-foldable for folded sheet and stacked blocks. This study advances the state of the art and expands the research field to investigate generic degree-4 vertex (4-vertex) origami, with a focus on facet-binding. In order to understand how facet-binding attributes to the mechanical properties of 4-vertex origami struc- tures, geometries of the 4-vertex origami cells are analyzed and analytically expressed. Through repeating and stacking 4-vertex cells, origami sheets and stacked origami blocks can be constructed. Geometry analyses discover two mecha- nisms that will lead to the self-locking of 4-vertex origami cells, sheets, and stacked blocks: in-cell facet-binding and inter-cell facet-binding. These two mechanisms and the predicted self-locking phenomena are verified through 3D simu- lations and prototype experiments. Finally, this paper briefly introduces the unusual mechanical properties caused by the locking of 4-vertex origami structures. The research reported in this paper could foster a new breed of self-locking struc- tures with various engineering applications.
@inProceedings{
 title = {Locking mechanisms in degree-4 vertex origami structures},
 type = {inProceedings},
 year = {2016},
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 pages = {979910},
 volume = {1},
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 month = {4},
 day = {15},
 city = {Las Vegas, NV USA},
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 abstract = {Origami has emerged as a potential tool for the design of mechanical metamaterials and metastructures whose novel properties originate from their crease patterns. Most of the attention in origami engineering has focused on the well- known Miura-Ori, a folded tessellation that is flat-foldable for folded sheet and stacked blocks. This study advances the state of the art and expands the research field to investigate generic degree-4 vertex (4-vertex) origami, with a focus on facet-binding. In order to understand how facet-binding attributes to the mechanical properties of 4-vertex origami struc- tures, geometries of the 4-vertex origami cells are analyzed and analytically expressed. Through repeating and stacking 4-vertex cells, origami sheets and stacked origami blocks can be constructed. Geometry analyses discover two mecha- nisms that will lead to the self-locking of 4-vertex origami cells, sheets, and stacked blocks: in-cell facet-binding and inter-cell facet-binding. These two mechanisms and the predicted self-locking phenomena are verified through 3D simu- lations and prototype experiments. Finally, this paper briefly introduces the unusual mechanical properties caused by the locking of 4-vertex origami structures. The research reported in this paper could foster a new breed of self-locking struc- tures with various engineering applications.},
 bibtype = {inProceedings},
 author = {Fang, H and Li, S and Xu, J and Wang, K W},
 booktitle = {Proc. SPIE 9799 Active and Passive Smart Structures and Integrated Systems}
}
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