The Experts below are selected from a list of 15057 Experts worldwide ranked by ideXlab platform
Jinkyu Yang - One of the best experts on this subject based on the ideXlab platform.
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Origami based impact mitigation via rarefaction solitary wave creation
Science Advances, 2019Co-Authors: Hiromi Yasuda, Yasuhiro Miyazawa, E G Charalampidis, C Chong, P G Kevrekidis, Jinkyu YangAbstract:The principles underlying the art of Origami paper folding can be applied to design sophisticated metamaterials with unique mechanical properties. By exploiting the flat crease patterns that determine the dynamic folding and unfolding motion of Origami, we are able to design an Origami-based metamaterial that can form rarefaction solitary waves. Our analytical, numerical, and experimental results demonstrate that this rarefaction solitary wave overtakes initial compressive strain waves, thereby causing the latter part of the Origami structure to feel tension first instead of compression under impact. This counterintuitive dynamic mechanism can be used to create a highly efficient—yet reusable—impact mitigating system without relying on material damping, plasticity, or fracture.
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Origami-based tunable truss structures for non-volatile mechanical memory operation
Nature Communications, 2017Co-Authors: Hiromi Yasuda, Mia Lee, Tomohiro Tachi, Jinkyu YangAbstract:Origami has recently received significant interest from the scientific community as a method for designing building blocks to construct metamaterials. However, the primary focus has been placed on their kinematic applications by leveraging the compactness and auxeticity of planar Origami platforms. Here, we present volumetric Origami cells—specifically triangulated cylindrical Origami (TCO)—with tunable stability and stiffness, and demonstrate their feasibility as non-volatile mechanical memory storage devices. We show that a pair of TCO cells can develop a double-well potential to store bit information. What makes this Origami-based approach more appealing is the realization of two-bit mechanical memory, in which two pairs of TCO cells are interconnected and one pair acts as a control for the other pair. By assembling TCO-based truss structures, we experimentally verify the tunable nature of the TCO units and demonstrate the operation of purely mechanical one- and two-bit memory storage prototypes. Origami is a popular method to design building blocks for mechanical metamaterials. Here, the authors assemble a volumetric Origami-based structure, predict its axial and rotational movements during folding, and demonstrate the operation of mechanical one- and two-bit memory storage.
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Origami-based tunable truss structures for non-volatile mechanical memory operation
Nature Communications, 2017Co-Authors: Hiromi Yasuda, Mia Lee, Tomohiro Tachi, Jinkyu YangAbstract:Origami has recently received significant interest from the scientific community as a building block for constructing metamaterials. However, the primary focus has been placed on their kinematic applications, such as deployable space structures and sandwich core materials, by leveraging the compactness and auxeticity of planar Origami platforms. Here, we present volumetric Origami cells -- specifically triangulated cylindrical Origami (TCO) -- with tunable stability and stiffness, and demonstrate their feasibility as non-volatile mechanical memory storage devices. We show that a pair of Origami cells can develop a double-well potential to store bit information without the need of residual forces. What makes this Origami-based approach more appealing is the realization of two-bit mechanical memory, in which two pairs of TCO cells are interconnected and one pair acts as a control for the other pair. Using TCO-based truss structures, we present an experimental demonstration of purely mechanical one- and two-bit memory storage mechanisms.
Tomohiro Tachi - One of the best experts on this subject based on the ideXlab platform.
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Origami-based tunable truss structures for non-volatile mechanical memory operation
Nature Communications, 2017Co-Authors: Hiromi Yasuda, Mia Lee, Tomohiro Tachi, Jinkyu YangAbstract:Origami has recently received significant interest from the scientific community as a method for designing building blocks to construct metamaterials. However, the primary focus has been placed on their kinematic applications by leveraging the compactness and auxeticity of planar Origami platforms. Here, we present volumetric Origami cells—specifically triangulated cylindrical Origami (TCO)—with tunable stability and stiffness, and demonstrate their feasibility as non-volatile mechanical memory storage devices. We show that a pair of TCO cells can develop a double-well potential to store bit information. What makes this Origami-based approach more appealing is the realization of two-bit mechanical memory, in which two pairs of TCO cells are interconnected and one pair acts as a control for the other pair. By assembling TCO-based truss structures, we experimentally verify the tunable nature of the TCO units and demonstrate the operation of purely mechanical one- and two-bit memory storage prototypes. Origami is a popular method to design building blocks for mechanical metamaterials. Here, the authors assemble a volumetric Origami-based structure, predict its axial and rotational movements during folding, and demonstrate the operation of mechanical one- and two-bit memory storage.
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bar and hinge models for scalable analysis of Origami
International Journal of Solids and Structures, 2017Co-Authors: Evgueni T Filipov, Tomohiro Tachi, Ke Liu, Mark Schenk, Glaucio H PaulinoAbstract:Abstract Thin sheets assembled into three dimensional folding Origami can have various applications from reconfigurable architectural structures to metamaterials with tunable properties. Simulating the elastic stiffness and estimating deformed shapes of these systems is important for conceptualizing and designing practical engineering structures. In this paper, we improve, verify, and test a simplified bar and hinge model that can simulate essential behaviors of Origami. The model simulates three distinct behaviors: stretching and shearing of thin sheet panels; bending of the initially flat panels; and bending along prescribed fold lines. The model is simple and efficient, yet it can provide realistic representation of stiffness characteristics and deformed shapes of Origami structures. The simplicity of this model makes it well suited for the Origami engineering community, and its efficiency makes it suitable for design problems such as optimization and parameterization of geometric Origami variations.
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Origami-based tunable truss structures for non-volatile mechanical memory operation
Nature Communications, 2017Co-Authors: Hiromi Yasuda, Mia Lee, Tomohiro Tachi, Jinkyu YangAbstract:Origami has recently received significant interest from the scientific community as a building block for constructing metamaterials. However, the primary focus has been placed on their kinematic applications, such as deployable space structures and sandwich core materials, by leveraging the compactness and auxeticity of planar Origami platforms. Here, we present volumetric Origami cells -- specifically triangulated cylindrical Origami (TCO) -- with tunable stability and stiffness, and demonstrate their feasibility as non-volatile mechanical memory storage devices. We show that a pair of Origami cells can develop a double-well potential to store bit information without the need of residual forces. What makes this Origami-based approach more appealing is the realization of two-bit mechanical memory, in which two pairs of TCO cells are interconnected and one pair acts as a control for the other pair. Using TCO-based truss structures, we present an experimental demonstration of purely mechanical one- and two-bit memory storage mechanisms.
Hiromi Yasuda - One of the best experts on this subject based on the ideXlab platform.
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Origami based impact mitigation via rarefaction solitary wave creation
Science Advances, 2019Co-Authors: Hiromi Yasuda, Yasuhiro Miyazawa, E G Charalampidis, C Chong, P G Kevrekidis, Jinkyu YangAbstract:The principles underlying the art of Origami paper folding can be applied to design sophisticated metamaterials with unique mechanical properties. By exploiting the flat crease patterns that determine the dynamic folding and unfolding motion of Origami, we are able to design an Origami-based metamaterial that can form rarefaction solitary waves. Our analytical, numerical, and experimental results demonstrate that this rarefaction solitary wave overtakes initial compressive strain waves, thereby causing the latter part of the Origami structure to feel tension first instead of compression under impact. This counterintuitive dynamic mechanism can be used to create a highly efficient—yet reusable—impact mitigating system without relying on material damping, plasticity, or fracture.
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Origami-based tunable truss structures for non-volatile mechanical memory operation
Nature Communications, 2017Co-Authors: Hiromi Yasuda, Mia Lee, Tomohiro Tachi, Jinkyu YangAbstract:Origami has recently received significant interest from the scientific community as a method for designing building blocks to construct metamaterials. However, the primary focus has been placed on their kinematic applications by leveraging the compactness and auxeticity of planar Origami platforms. Here, we present volumetric Origami cells—specifically triangulated cylindrical Origami (TCO)—with tunable stability and stiffness, and demonstrate their feasibility as non-volatile mechanical memory storage devices. We show that a pair of TCO cells can develop a double-well potential to store bit information. What makes this Origami-based approach more appealing is the realization of two-bit mechanical memory, in which two pairs of TCO cells are interconnected and one pair acts as a control for the other pair. By assembling TCO-based truss structures, we experimentally verify the tunable nature of the TCO units and demonstrate the operation of purely mechanical one- and two-bit memory storage prototypes. Origami is a popular method to design building blocks for mechanical metamaterials. Here, the authors assemble a volumetric Origami-based structure, predict its axial and rotational movements during folding, and demonstrate the operation of mechanical one- and two-bit memory storage.
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Origami-based tunable truss structures for non-volatile mechanical memory operation
Nature Communications, 2017Co-Authors: Hiromi Yasuda, Mia Lee, Tomohiro Tachi, Jinkyu YangAbstract:Origami has recently received significant interest from the scientific community as a building block for constructing metamaterials. However, the primary focus has been placed on their kinematic applications, such as deployable space structures and sandwich core materials, by leveraging the compactness and auxeticity of planar Origami platforms. Here, we present volumetric Origami cells -- specifically triangulated cylindrical Origami (TCO) -- with tunable stability and stiffness, and demonstrate their feasibility as non-volatile mechanical memory storage devices. We show that a pair of Origami cells can develop a double-well potential to store bit information without the need of residual forces. What makes this Origami-based approach more appealing is the realization of two-bit mechanical memory, in which two pairs of TCO cells are interconnected and one pair acts as a control for the other pair. Using TCO-based truss structures, we present an experimental demonstration of purely mechanical one- and two-bit memory storage mechanisms.
Glaucio H Paulino - One of the best experts on this subject based on the ideXlab platform.
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untethered control of functional Origami microrobots with distributed actuation
Proceedings of the National Academy of Sciences of the United States of America, 2020Co-Authors: Larissa S Novelino, Glaucio H Paulino, Ruike ZhaoAbstract:Deployability, multifunctionality, and tunability are features that can be explored in the design space of Origami engineering solutions. These features arise from the shape-changing capabilities of Origami assemblies, which require effective actuation for full functionality. Current actuation strategies rely on either slow or tethered or bulky actuators (or a combination). To broaden applications of Origami designs, we introduce an Origami system with magnetic control. We couple the geometrical and mechanical properties of the bistable Kresling pattern with a magnetically responsive material to achieve untethered and local/distributed actuation with controllable speed, which can be as fast as a tenth of a second with instantaneous shape locking. We show how this strategy facilitates multimodal actuation of the multicell assemblies, in which any unit cell can be independently folded and deployed, allowing for on-the-fly programmability. In addition, we demonstrate how the Kresling assembly can serve as a basis for tunable physical properties and for digital computing. The magnetic Origami systems are applicable to Origami-inspired robots, morphing structures and devices, metamaterials, and multifunctional devices with multiphysics responses.
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nonlinear mechanics of non rigid Origami an efficient computational approach
Proceedings of The Royal Society A: Mathematical Physical and Engineering Sciences, 2017Co-Authors: Ke Liu, Glaucio H PaulinoAbstract:Origami-inspired designs possess attractive applications to science and engineering (e.g. deployable, self-assembling, adaptable systems). The special geometric arrangement of panels and creases gives rise to unique mechanical properties of Origami, such as reconfigurability, making Origami designs well suited for tunable structures. Although often being ignored, Origami structures exhibit additional soft modes beyond rigid folding due to the flexibility of thin sheets that further influence their behaviour. Actual behaviour of Origami structures usually involves significant geometric nonlinearity, which amplifies the influence of additional soft modes. To investigate the nonlinear mechanics of Origami structures with deformable panels, we present a structural engineering approach for simulating the nonlinear response of non-rigid Origami structures. In this paper, we propose a fully nonlinear, displacement-based implicit formulation for performing static/quasi-static analyses of non-rigid Origami structures based on ‘bar-and-hinge’ models. The formulation itself leads to an efficient and robust numerical implementation. Agreement between real models and numerical simulations demonstrates the ability of the proposed approach to capture key features of Origami behaviour.
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bar and hinge models for scalable analysis of Origami
International Journal of Solids and Structures, 2017Co-Authors: Evgueni T Filipov, Tomohiro Tachi, Ke Liu, Mark Schenk, Glaucio H PaulinoAbstract:Abstract Thin sheets assembled into three dimensional folding Origami can have various applications from reconfigurable architectural structures to metamaterials with tunable properties. Simulating the elastic stiffness and estimating deformed shapes of these systems is important for conceptualizing and designing practical engineering structures. In this paper, we improve, verify, and test a simplified bar and hinge model that can simulate essential behaviors of Origami. The model simulates three distinct behaviors: stretching and shearing of thin sheet panels; bending of the initially flat panels; and bending along prescribed fold lines. The model is simple and efficient, yet it can provide realistic representation of stiffness characteristics and deformed shapes of Origami structures. The simplicity of this model makes it well suited for the Origami engineering community, and its efficiency makes it suitable for design problems such as optimization and parameterization of geometric Origami variations.
Carlos E. Castro - One of the best experts on this subject based on the ideXlab platform.
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low cost simple and scalable self assembly of dna Origami nanostructures
Nano Research, 2019Co-Authors: Patrick D Halley, Randy A Patton, Amjad Chowdhury, John C Byrd, Carlos E. CastroAbstract:Despite demonstrating exciting potential for applications such as drug delivery and biosensing, the development of nanodevices for practical applications and broader use in research and education are still hindered by the time, effort, and cost associated with DNA Origami fabrication. Simple and robust methods to perform and scale the DNA Origami self-assembly process are critical to facilitate broader use and translation to industrial or clinical applications. We report a simple approach to fold DNA Origami nanostructures that is fast, robust, and scalable. We demonstrate fabrication at scales approximately 100–1,500-fold higher than typical scales. We further demonstrate an approach we termed low-cost efficient annealing (LEAN) self-assembly involving initial heating at 65 °C for 10 min, then annealing at 51 °C for 2 h, followed by brief quenching at 4 °C that leads to effective assembly of a range of DNA Origami structures tested. In contrast to other methods for scaling DNA Origami assembly, this approach can be carried out using cheap and widely available equipment (e.g., hot plates, water baths, and laboratory burners) and uses standard recipes and materials so is readily applied to any existing or new DNA Origami designs. We envision these methods can facilitate device development for commercial applications and facilitate broader use of DNA Origami in research and education.
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a primer to scaffolded dna Origami
Nature Methods, 2011Co-Authors: Carlos E. Castro, Enrique Lin Shiao, Tobias Wauer, Philipp Wortmann, Fabian Kilchherr, Mark Bathe, Hendrik DietzAbstract:Molecular self-assembly with scaffolded DNA Origami enables building custom-shaped nanometer-scale objects with molecular weights in the megadalton regime. Here we provide a practical guide for design and assembly of scaffolded DNA Origami objects. We also introduce a computational tool for predicting the structure of DNA Origami objects and provide information on the conditions under which DNA Origami objects can be expected to maintain their structure.
