Abstract : Discussions on topics related to origami engineering will take place at this mini-symposium. Presenters will present their research aimed at applying the technology of origami, the folding of flat materials to create shapes, to engineering, and exploring the geometric properties of origami from a mathematical perspective to explore its range of applications.
Organizer(s) : Jun Mitani, Sachiko Ishida, Kazuya Saito
[01402] Solitons in Origami / Kirigami Tessellations and Their Underlying Dynamical Systems
Author(s) :
Rinki Imada (The University of Tokyo)
Tomohiro Tachi (The University of Tokyo)
Abstract : The non-uniform folding of origami/kirigami tessellation, the folding where the configuration of their unit cell isn’t identical, is potentially a great source of nonlinear phenomena. We can mathematically understand these phenomena by the nature of the dynamical systems induced by their geometry.
In this presentation, we report the “soliton-like” phenomenon with the propagation of localized deformation in origami/kirigami tessellations which comes from different mechanisms, i.e., the homoclinic/heteroclinic solutions of their dynamical systems.
[01403] Macroscopic Behavior of Kirigami Tessellations with Contact Surfaces
Author(s) :
Akito Adachi (The University of Tokyo)
Tomohiro Tachi (The University of Tokyo)
Abstract : Origami and kirigami tessellations with contact surfaces have potential applications including flexible electronics and wearable devices. However, the manufacturing process requires a simultaneous folding of all creases, which makes the pattern difficult to be manufactured. In this study, we reveal the macroscopic behavior of kirigami variations with contact surfaces through singular value decomposition of the kinematic deformation of each module; through this study, we explore the possibility of manufacturing such tessellations by tension-induced buckling.
[01432] Miura fold bending in two directions and their combination
Author(s) :
Sora Moriyama (The University of Tokyo)
Tomohiro Tachi (The University of Tokyo)
Kuo-chih Chuang (Zhejiang University)
Abstract : For Miura folds, where the unit cell is usually composed of parallelograms, it is known that folds that are not parallel to the row’s direction can be deformed in-plane after folding. If the unit cell is constructed so that it has different angles in the column’s direction, it is deformable out-of-plane after folding. By understanding and combining these mathematically, we will present the Miura fold, which can be deformed in any direction.
[01526] Development study of foldable and portable comfortable acoustic space
Author(s) :
Keiko Yamazaki (Meiji University)
Masanori Hashiguchi (KEISOKU ENGINEERING SYSTEM CO., LTD.)
Dahai Mi (KEISOKU ENGINEERING SYSTEM CO., LTD.)
Ichiro Hagiwara (Meiji University)
Abstract : The purpose of our research is to develop a simple sound-reducing shade to enjoy playing music at home. The requirements for the shade are relatively inexpensive, foldable, suitable size and acoustic environment for playing, and most importantly sound dampening ability. Normally, the development of such a product requires many prototypes and verifications, but in this research, by utilizing finite element analysis to find the optimum material and shape without producing a large number of prototypes.
[01562] A remark on the foldability of non-simply connected paper
Author(s) :
Hiroko Murai (Nara Women's University)
Akari Iwamura (Nara Women's University)
Abstract : It is known that for any simply connected piece of paper $P$,
any flat folded state $(f,\lambda)$ of $P$ is realized by a motion from the unfolded state.
In this talk, we show that the above result does not hold if the paper is not simply connected
and give some examples.
[01571] Laboratory-scale Workshop for Enhancing Designability of Origami Cores
Author(s) :
Sachiko Ishida (Meiji University)
Abstract : The objective of this study is to develop a laboratory-scale fabrication method to prototype origami-like foldable cores with our own designs. As the first attempt, we formed honeycomb cores in such a way that thermoplastic sheets were pressed between heated molds with corrugated configuration and glued together. This method worked well to enhance designability of honeycomb cores, because the press forming was applicable even for complex designs and could improve shape accuracy.
