From flat sheets to curved geometries: Origami and kirigami approaches

Callens, Sebastien J.P.; Zadpoor, Amir A.

doi:10.1016/j.mattod.2017.10.004

Cited by 312 publications

(209 citation statements)

References 135 publications

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“…In our case, Equation is applicable under the assumptions that the strain induced in individual line forming the network is constant (α = 0.5), Young's modulus of the printed structure in perpendicular and parallel direction is equal in magnitude, and the initial curvature of the printed structure has no significant influence on the equilibrium curvature of the structure at T > LCST. We find that the network with θ = 90° shrinks into a flat sheet ( H = 0 mm −1 ) and not a saddle shape, which otherwise is characteristic of a bilayer sheet . The curvatures of the network as observed in experiments and predicted by the model (Equation ) are shown in Figure c.…”

Section: Methodsmentioning

confidence: 68%

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Directed Printing and Reconfiguration of Thermoresponsive Silica‐pNIPAM Nanocomposites

Guo

Belgodere

et al. 2019

Macromol. Rapid Commun.

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Printing of polymeric composites into desired patterns and shapes has revolutionized small‐scale manufacturing processes. However, high‐resolution printing of adaptive materials that change shape in response to external stimuli remains a significant technical challenge. The article presents a new approach of printing thermoresponsive poly(N‐isopropylacrylamide) into macroscopic structures that dynamically reconfigure in response to heating and cooling cycles. The printing process is performed using an external laser source, which enables thermal cross‐linking of the polymer ink consisting of monomer, cross‐linker, initiator, and inorganic nanoparticles. It is shown that the addition of silica nanoparticles enhances the mechanical properties of poly(N‐isopropylacrylamide) while maintaining its thermoresponsiveness at micrometer‐scale resolution, which otherwise is not feasible by extrusion‐based three‐dimensional printing techniques. It is demonstrated that spatial reconfiguration of the printed monolayers upon increasing temperature is governed by the local geometry, which enables mimicking the reconfiguration of plant leaves in a natural environment. The study lays a foundation for developing a new fabrication platform to print thermoresponsive structures that may find applications in biomedical implants, sensors, and other multi‐responsive materials.

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Section: Methodsmentioning

confidence: 68%

“…We find that the network with θ = 90° shrinks into a flat sheet (H = 0 mm −1 ) and not a saddle shape, which otherwise is characteristic of a bilayer sheet. [30,66] The curvatures of the network as observed in experiments and predicted by the model (Equation (1)) are shown in Figure 4c.…”

mentioning

confidence: 93%

Directed Printing and Reconfiguration of Thermoresponsive Silica‐pNIPAM Nanocomposites

Guo

Belgodere

et al. 2019

Macromol. Rapid Commun.

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Section: System Integrationmentioning

confidence: 99%

“…Structural design is a promising way to achieve stretchable FHE integration at system level, which not only enhances the stretchability of soft components, but also bestows stretchability to rigid components. Classical structural design strategies such as wave, [20,82,89,[274][275][276] island-bridge, [37,[277][278][279][280][281] origami/ kirigami, [282][283][284][285][286] and textile [287][288][289][290] have been developed for realizing stretchable systems or modules, which are discussed as follows.…”

Section: Interconnected Integrationmentioning

confidence: 99%

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Cyber–Physiochemical Interfaces

et al. 2020

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Living things rely on various physical, chemical, and biological interfaces, e.g., somatosensation, olfactory/gustatory perception, and nervous system response. They help organisms to perceive the world, adapt to their surroundings, and maintain internal and external balance. Interfacial information exchanges are complicated but efficient, delicate but precise, and multimodal but unisonous, which has driven researchers to study the science of such interfaces and develop techniques with potential applications in health monitoring, smart robotics, future wearable devices, and cyber physical/human systems. To understand better the issues in these interfaces, a cyber–physiochemical interface (CPI) that is capable of extracting biophysical and biochemical signals, and closely relating them to electronic, communication, and computing technology, to provide the core for aforementioned applications, is proposed. The scientific and technical progress in CPI is summarized, and the challenges to and strategies for building stable interfaces, including materials, sensor development, system integration, and data processing techniques are discussed. It is hoped that this will result in an unprecedented multi‐disciplinary network of scientific collaboration in CPI to explore much uncharted territory for progress, providing technical inspiration—to the development of the next‐generation personal healthcare technology, smart sports‐technology, adaptive prosthetics and augmentation of human capability, etc.

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Design of Architectured Materials Based on Mechanically Driven Structural and Compositional Patterning

2019

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Providing materials with an inner architecture that improves their mechanical and physical properties is a potent approach to materials design. Herein, the possibilities of such architecturing by means of severe plastic deformation (SPD) are discussed. Compositional and structural patterns caused by SPD processing can potentially improve the mechanical characteristics and physical properties of exemplary materials considered. The message to convey is that SPD opens up new opportunities with regard to producing materials with a multiscale structure. This can be achieved by virtue of the following effects associated with SPD: extreme grain refinement, whose level is governed by strain distribution; controlled self‐organization of the structure of multiphase materials; and anomalously fast mass transfer, which leads to the formation of new phases and various “reaction–diffusion” patterns. Furthermore, combining SPD with conventional metal forming, differential heat treatment, or 3D printing offers additional possibilities, which are considered in this article.

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From flat sheets to curved geometries: Origami and kirigami approaches

Cited by 312 publications

References 135 publications

Directed Printing and Reconfiguration of Thermoresponsive Silica‐pNIPAM Nanocomposites

Directed Printing and Reconfiguration of Thermoresponsive Silica‐pNIPAM Nanocomposites

Cyber–Physiochemical Interfaces

Design of Architectured Materials Based on Mechanically Driven Structural and Compositional Patterning

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