This Piece of Paper
Could Revolutionize Human Waste
Could this simple Kirigami paper be a solution to our waste problem? I got to chat to the inventor of Cushion Lock, Tom Corrigan, and discover the amazing potential these designs have unlocked. Thanks to 3M for giving me this peek behind the science of it all.
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In kirigami, the paper is cut as well as being folded, resulting in a three-dimensional design that stands away from the page. Kirigami typically does not use glue.
In the United States, the term kirigami was coined by Florence Temko from Japanese kiri, 'cut', and kami, 'paper', in the title of her 1962 book, Kirigami, the Creative Art of Paper cutting. The book achieved enough success that the word kirigami was accepted as the Western name for the art of paper cutting.
Typically, kirigami starts with a folded base, which is then unfolded; cuts are then opened and flattened to make the finished design. Simple kirigami are usually symmetrical, such as snowflakes, pentagrams, or orchid blossoms. A difference between kirigami and the art of "full base", or 180-degree opening structures, is that kirigami is made out of a single piece of paper that has then been cut.
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Notable Kirigami Artists
* Seiji Fujishiro (born 1924–), a renowned kirie ('paper picture') artist known for his colourful kirigami, which have also been published as a book.
* Nahoko Kojima (born 1981–), a professional contemporary Japanese kirigami artist, who pioneered sculptural, three-dimensional kirigami. - https://en.wikipedia.org/wiki/Kirigami
Kirigami
Le kirigami est, dans la culture japonaise, l'art du découpage du papier, et l'ensemble des œuvres en papier découpé qui en sont issues. Il se différencie de l'origami par la présence de découpes, en plus des pliages. Le mot kirigami (切り紙), est composé de kiru (切る, couper) et de kami (紙, papier). On parle également de kirie (切り絵, littéralement « dessin découpé »).
Le kirigami inspire aujourd'hui les nanotechnologies et d'autres domaines technico-scientifiques.
https://fr.wikipedia.org/wiki/Kirigami
Buckling Induced Kirigami
Harvard John A. Paulson School of Engineering and Applied Sciences Researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) are drawing material inspiration from the ancient Japanese paper craft of kirigami.
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Gary P. T. Choi
Department of Mathematics
The Chinese University of Hong Kong
Department of Mathematics
The Chinese University of Hong Kong
Abstract:
Kirigami tessellations, regular planar patterns formed by partially cutting flat, thin sheets, allow compact shapes to morph into open structures with rich geometries and unusual material properties. However, geometric and topological constraints make the design of such structures challenging. Here we pose and solve the inverse problem of determining the number, size and orientation of cuts that enables the deployment of a closed, compact regular kirigami tessellation to conform approximately to any prescribed target shape in two or three dimensions. We first identify the constraints on the lengths and angles of generalized kirigami tessellations that guarantee that their reconfigured face geometries can be contracted from a non-trivial deployed shape to a compact, non-overlapping planar cut pattern. We then encode these conditions into a flexible constrained optimization framework to obtain generalized kirigami patterns derived from various periodic tesselations of the plane that can be deployed into a wide variety of prescribed shapes. A simple mechanical analysis of the resulting structure allows us to determine and control the stability of the deployed state and control the deployment path. Finally, we fabricate physical models that deploy in two and three dimensions to validate this inverse design approach. Altogether, our approach, combining geometry, topology and optimization, highlights the potential for generalized kirigami tessellations as building blocks for shape-morphing mechanical metamaterials.
Publisher's Version Last updated on 08/31/2019
Kirigami tessellations, regular planar patterns formed by partially cutting flat, thin sheets, allow compact shapes to morph into open structures with rich geometries and unusual material properties. However, geometric and topological constraints make the design of such structures challenging. Here we pose and solve the inverse problem of determining the number, size and orientation of cuts that enables the deployment of a closed, compact regular kirigami tessellation to conform approximately to any prescribed target shape in two or three dimensions. We first identify the constraints on the lengths and angles of generalized kirigami tessellations that guarantee that their reconfigured face geometries can be contracted from a non-trivial deployed shape to a compact, non-overlapping planar cut pattern. We then encode these conditions into a flexible constrained optimization framework to obtain generalized kirigami patterns derived from various periodic tesselations of the plane that can be deployed into a wide variety of prescribed shapes. A simple mechanical analysis of the resulting structure allows us to determine and control the stability of the deployed state and control the deployment path. Finally, we fabricate physical models that deploy in two and three dimensions to validate this inverse design approach. Altogether, our approach, combining geometry, topology and optimization, highlights the potential for generalized kirigami tessellations as building blocks for shape-morphing mechanical metamaterials.
Publisher's Version Last updated on 08/31/2019
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