J. Mech. Des. 141(4), 041401 (Jan 11, 2019)
Andrew S. Gillman; Kazuko Fuchi; Philip R. Buskohl
J. Mech. Des. 141(4), 041401 (Jan 11, 2019)
Origami, the ancient art of paper folding, is finding numerous uses in scientific and engineering applications because of the combined advances in mathematics, computer science, and computational geometry. From deployment of solar arrays and antennas to design of robots and modeling of protein folding, origami provides an efficient means of compaction and coordinated motion. Many of the design and analysis tools for origami have relied on both rigid body mechanics and adaptation of well-known fold patterns for engineering applications. This work expands on these approaches through development of an automated design tool for fold pattern discovery, while accounting for non-rigid (deformable) facets through a novel nonlinear mechanics model. The nonlinearity presents challenges for finding the optimal design, and we employ an evolutionary algorithm for navigating this complex design space. With this framework, fold patterns satisfying targeted motions can be identified automatically and thus enables discovery of fold patterns designed specifically for engineering applications.
For the full article please see ASME's Digital Connection.
Jessica Morgan, Spencer P. Magleby and Larry L. Howell
J. Mech. Des 138(5), 052301; doi: 10.1115/1.4032973
Engineers have taken an interest in origami and developing it further for applications. Characteristics of origami of particular interest to engineers include: (1) stowability, (2) portability, (3) deployability, (4) part number reduction, (5) manufacturability from a flat sheet of material, (6) a single manufacturing technique (folding), (7) reduced assembly, (8) ease of miniaturization, and (9) low material volume and mass. Several of these attributes are of particular value in aerospace applications and it is anticipated that many more aerospace mechanisms could be developed through the use of a design process that adapts origami characteristics for use in devices and products. The research presented in this paper has two main objectives: to demonstrate that a design framework can be created to more reliably use origami patterns and principles as the basis for aerospace mechanisms and provide examples that illustrate an approach to designing origami-adapted products. This paper presents the origami-adapted design process, which is then illustrated and tested using three examples of preliminary design: an origami bellows to protect the drill shafts of a Mars Rover, an expandable habitat for the International Space Station, and a deployable parabolic antenna for space and earth communication systems.
For the Full Research Paper please visit ASME's Digital Library.
Kazuko Fuchi, Philip R. Buskohl, Giorgio Bazzan, Michael F. Durstock, Gregory W. Reich, Richard A. Vaia and James J. Joo
J. Mech. Des 137(9), 091401; doi: 10.1115/1.4030876
Origami structures morph between 2D and 3D configurations, and their efficient shape reconfigurations show potential for many engineering applications. However, the enormity of the design space and the complex relationship between origami-based geometries and engineering metrics place a severe limitation on design strategies based on intuition. This work proposes a physics-based origami design method using topology optimization that determines an optimal crease pattern for a folding by adding or removing folds based on a design metric. Optimization techniques and mechanical analysis are also co-utilized to identify an action origami building block and determine the optimal network connectivity between multiple actuators.
Authors: Sachiko Ishida, Taketoshi Nojima and Ichiro Hagiwara
J. Mech. Des. 136(9), 091007 (2014)
A new approach for obtaining the crease patterns of foldable conical structures from crease patterns of cylindrical structures based on the origami folding theory using conformal mapping is presented in this paper. Mapping for flow with circulation, which is the so-called polar conversion, is demonstrated as an example. This mapping can be used to produce similar elements and maintain the regularity of fold lines. This is a significant advantage when the mapping approach is used to produce foldable structures, because
it is relatively easy to control angles between fold lines. Thus, this proposed approach enables us to design complex structures from simple original structures systematically, maintaining advanced characteristics particular to origami such as folding up spatial structures onto a plane and expanding them at will.
Crease patterns and physical model; (a): original crease pattern of cylindrical structure; (b): transformed crease pattern of conical structure after angle correction; (c): physical model of conical structure. Extracted from Fig. 4
For the Abstract and Full Article visit ASME's Digital Collection.
This section includes brief descriptions of articles soon to be or recently published by the Journal of Mechanical Design. These featured articles highlight recent research developments and emerging trends in mechanical design. For Abstracts and Full Articles please see ASME's Digital Collection.