Recoverable and Programmable Collapse from Folding Pressurized Origami Cellular Solids

Li, S.; Fang, Hongbin; Wang, K. W.

doi:10.1103/physrevlett.117.114301

Cited by 65 publications

(33 citation statements)

References 29 publications

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“…It is important to note that origami‐inspired metamaterial designs are not only restricted to planar surfaces or arrangement of the patterns, but it can also be extended into 3D space . This implies that it is possible for us to design mechanical metamaterials that combine the geometrical benefits of architected cellular materials (e.g., high specific strength in micro/nanolattices) with origami‐inspired design principles (e.g., those that could induce programmable stiffness, bistability, multistability).…”

Section: Utilizing Architecture Size Effect and Mechanismmentioning

confidence: 99%

Mechanical Metamaterials and Their Engineering Applications

et al. 2019

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In the past decade, mechanical metamaterials have garnered increasing attention owing to its novel design principles which combine the concept of hierarchical architecture with material size effects at micro/nanoscale. This strategy is demonstrated to exhibit superior mechanical performance that allows us to colonize unexplored regions in the material property space, including ultrahigh strength-to-density ratios, extraordinary resilience, and energy absorption capabilities with brittle constituents. In the recent years, metamaterials with unprecedented mechanical behaviors such as negative Poisson's ratio, twisting under uniaxial forces, and negative thermal expansion are also realized. This paves a new pathway for a wide variety of multifunctional applications, for example, in energy storage, biomedical, acoustics, photonics, and thermal management. Herein, the fundamental scientific theories behind this class of novel metamaterials, along with their fabrication techniques and potential engineering applications beyond mechanics are reviewed. Explored examples include the recent progresses for both mechanical and functional applications. Finally, the current challenges and future developments in this emerging field is discussed as well.

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Section: Utilizing Architecture Size Effect and Mechanismmentioning

confidence: 99%

Mechanical Metamaterials and Their Engineering Applications

et al. 2019

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Section: Folding Induced Mechanical Propertiesmentioning

confidence: 99%

“…Many architected origami materials, such as the stacked Miura‐ori, have naturally embedded tubular channels that can be pressurized by fluidic principles (aka fluidic origami). The nonlinear relationships between the internal enclosed volume and external deformation can be exploited to achieve pressure induced stiffness control, rapid shape reconfiguration, recoverable and programmable collapse (Figure b), and quasi‐zero stiffness properties…”

Section: Folding Induced Mechanical Propertiesmentioning

confidence: 99%

Architected Origami Materials: How Folding Creates Sophisticated Mechanical Properties

et al. 2018

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devices, [26,27] to small-scale nano- [28][29][30] and DNA origamis. [31] A common theme in these studies is to exploit the sophisticated shape transformations from folding. For example, an origami robot is typically fabricated in a 2D flat configuration and then folded into the prescribed 3D shape to perform its tasks. The origamis have been treated essentially as linkage mechanisms in which rigid facets rotate around hingelike creases (aka "rigid-folding origami"). Elastic deformation of the constituent sheet materials or the dynamics of folding are often neglected. Such a limitation in scope indeed resonates the origin of this field, that is, folding was initially considered as a topic in geometry and kinematics.However, the increasingly diverse applications of origami require us to understand the force-deformation relationship and other mechanical properties of folded structures. Over the last decade, studies in this field started to expand beyond design and kinematics and into the domain of mechanics and dynamics. Catalyzed by this development, a family of architected origami materials quickly emerged (Figure 1). These materials are essentially assemblies of origami sheets or modules with carefully designed crease patterns. The kinematics of folding still plays an important role in creating certain properties of these origami materials. For example, rigid folding of the classical Miura-ori sheet induces an in-plane deformation pattern with auxetic properties (aka negative Poisson's ratios). [32,33] However, elastic energy in the deformed facets and creases, combined with their intricate spatial distributions, impart the origami materials with a rich list of desirable and even unorthodox properties that were never examined in origami before. For example, the Ron-Resch fold creates a unique tri-fold structure where pairs of triangular facets are oriented vertically to the overall origami sheet and pressed against each other. Such an arrangement can effectively resist buckling and create very high compressive load bearing capacity. [34] Other achieved properties include shape-reconfiguration, tunable nonlinear stiffness and dynamic characteristics, multistability, and impact absorption.Since the architected origami materials obtain their unique properties from the 3D geometries of the constituent sheets or modules, they can be considered a subset of architected cellular solids or mechanical metamaterials. [35][36][37][38][39] However, the origami materials have many unique characteristics. The rich geometries of origami offer us great freedom to tailor targeted Origami, the ancient Japanese art of paper folding, is not only an inspiring technique to create sophisticated shapes, but also a surprisingly powerful method to induce nonlinear mechanical properties. Over the last decade, advances in crease design, mechanics modeling, and scalable fabrication have fostered the rapid emergence of architected origami materials. These materials typically consist of folded origami sheets or modules with intricate 3D geomet...

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“…These regimes correspond to points of stable and unstable equilibrium, respectively (Supplemental Material, Fig. S2 [22]). Similar bistable behavior has previously been observed in multilayer Miura structures [23,24]. Characterization of pseudojoint dynamics.-To observe the dynamics of this mechanism, we applied pulse inputs with a magnitude of input speed ω s to the lower spine velocity to approximate a step input of θ 1 from a start angle θ 0 ¼ 40°to a stop angle θ s at 15°or 25°( Fig.…”

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confidence: 52%

Transformation Dynamics in Origami

Liu

Felton

2018

Phys. Rev. Lett.

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A single origami crease pattern can be folded into many different structures from the flat-unfolded state, effectively transforming in shape and function. This makes origami engineering a promising approach to transforming machines, but predicting and controlling this transformation is difficult because the fundamental dynamics of origami systems at the flat-unfolded state are not well understood. Working with Miura-inspired mechanisms, we identify and validate a model to predict configuration switching in mechanical origami systems. The model incorporates a hidden degree of freedom introduced by material compliance in the Miura mechanism. We characterize this pseudojoint statically and dynamically to identify its lumped stiffness and inertia and use it to create a new dynamic model. This model can be used to predict which configuration an origami mechanism will settle in by balancing the kinetic and potential energy of the system. We apply this model to design a branching origami structure with 17 distinct configurations controlled by a single actuator and demonstrate reliable switching between these configurations with tailored dynamic inputs. Given the fact that origami can replicate almost any shape, we expect that this framework will be applicable to transformation in arbitrary structures and mechanisms.

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Recoverable and Programmable Collapse from Folding Pressurized Origami Cellular Solids

Cited by 65 publications

References 29 publications

Mechanical Metamaterials and Their Engineering Applications

Mechanical Metamaterials and Their Engineering Applications

Architected Origami Materials: How Folding Creates Sophisticated Mechanical Properties

Transformation Dynamics in Origami

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