A Cellular Kirigami Morphing Wingbox Concept

Saito, Kazuya; Agnese, Fabio; Scarpa, Fabrizio

doi:10.1177/1045389x11416030

Cited by 58 publications

(33 citation statements)

References 29 publications

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“…Kirigami is the ancient Japanese art of folding and cutting paper and has been applied to produce complex 3D cellular structures using modular moulding techniques [35,36,37], foldable structures [38], robotic devices [39] and nanoscale artificial materials [40]. The interest reader may find a review of origami and kirigami engineering applications in [41].…”

Section: Introductionmentioning

confidence: 99%

A piezo-shunted kirigami auxetic lattice for adaptive elastic wave filtering

Ouisse

Collet

Scarpa

2016

Smart Mater. Struct.

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Abstract. Tailoring the dynamical behavior of wave-guide structures can provide an efficient and physically elegant approach for optimizing mechanical components with regards to vibroacoustic propagation. Architectured materials as pyramidal core kirigami cells combined with smart systems may represent a promising way to improve the vibroacoustic quality of structural components. This paper describes the design and modelling of a pyramidal core with auxetic (negative Poisson's ratio) characteristics and distributed shunted piezoelectric patches that allow for wave propagation control. The core is produced using a kirigami technique, inspired by the cutting/folding processes of the ancient Japanese art. The kirigami structure has a pyramidal unit cell shape that creates an in-plane negative Poisson's ratio macroscopic behavior. This structure exhibits in-plane elastic properties (Young's and shear modulus) which are higher than the out-of-plane ones, and hence this lattice has very specific properties in terms of wave propagation that are investigated in this work. The short-circuited configuration is first analysed, before using negative capacitance and resistance as a shunt which provides impressive band gaps in the low frequency range. All configurations are investigated by using a full analysis of the Brillouin zone, rendering possible the deep understanding of the dynamical properties of the smart lattice. The results are presented in terms of dispersion and directivity diagrams, and the smart lattice shows quite interesting properties for the adaptive filtering of elastic waves at low frequencies bandwidths.

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Section: Introductionmentioning

confidence: 99%

A piezo-shunted kirigami auxetic lattice for adaptive elastic wave filtering

Ouisse

Collet

Scarpa

2016

Smart Mater. Struct.

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“…As commonly used in the paper craft techniques, scratching or dashed-line cutting on crease lines is effective to make accurate foldinglines. Taking a similar approach, an aerofoil shaped honeycomb are made from Kevlar sheets [15]. However, this method includes fiber breakages on folding lines and can be used only for one-time folding.…”

Section: Application Of Advanced Composite Materials Folding Lines Onmentioning

confidence: 99%

“…The third part describes a method of applying this technique to advanced composite materials. As an exapmle of kirigami composite honeycombs, a wingbox was already manufactured in autoclave-cured woven Kevlar fabric using the FLD around an airfoil profile [15]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

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Manufacture of Arbitrary Cross-Section Composite Honeycomb Cores Based on Origami Techniques

Saito

Pellegrino

Nojima³

2014

Journal of Mechanical Design

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In recent years, as space structures have become large and require higher accuracy, composite honeycombs, which can reduce weight and have low thermal expansion, are in increasing demand. As observed in the design of antenna reflectors and rocket bodies, both flat and 3D-shaped cores are used in this field. However, these special honeycombs have high manufacturing costs and limited applications. This study illustrates a new strategy to fabricate arbitrary cross-section honeycombs with applications of advanced composite materials. These types of honeycombs are usually manufactured from normal flat honeycombs by curving or carving, but the proposed method enables us to construct objective shaped honeycombs directly. The authors first introduce the concept of the kirigami honeycomb, which is made from single flat sheets and has periodical slits resembling origami. In previous studies, honeycombs having various shapes were made using this method, and were realized by only changing folding line diagrams (FLDs). In this study, these 3D kirigami honeycombs are generalized by numerical parameters and fabricated using a newly proposed FLD design method, which enables us to draw the FLD of arbitrary cross-section honeycombs. Next, the authors describe a method of applying this technique to advanced composite materials. Applying the partially soft composite techniques, folding lines are materialized by silicon rubber hinges on carbon fiber reinforced plastic. Complex FLD patterns are then printed using masks on carbon fabrics. Finally, these foldable composites that are cured in corrugated shapes in autoclaves are folded into honeycomb shapes, and some typical samples are shown with their FLDs.

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“…Developing approaches to enhance the ductility of 2D nanomaterials thus remains an open topic. The concept of Kirigami, an ancient Japanese art of cutting and folding paper, has been recently used to create complex 3D 3 multiscale structures [25][26][27], but also to pattern graphene experimentally into a variety of shapes including stretchable electrodes, springs, and robust hinges, which exhibit outstanding and tunable mechanical properties [28]. The Kirigami concept has also been applied to graphene and MoS 2 films, and molecular dynamics simulations have investigated the effectiveness of the Kirigami approach to improve the ductility and decrease the brittleness of 2D nanomaterials [29,30].…”

Section: Introductionmentioning

confidence: 99%

Super stretchable hexagonal boron nitride Kirigami

2017

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Abstract Kirigami, the ancient Japanese art of cutting and folding paper at the macroscale, has been recently applied to produce nanostructures with unusual deformation mechanisms. In this work we analyse the mechanical properties and deformation mechanisms leading to remarkable stretching and bilinear stiffness in armchair and zigzag hexagonal boron nitride (h-BN) Kirigami nanosheets using classical molecular dynamics simulations. We identify three geometric parameters that govern the mechanics and ductility of Kirigami h-BN. Enhancements in tensile strains up to 3-5 times higher than those of pristine h-BN can be obtained. The variations of stiffness, ultimate strength and strain with the parameters defining the Kirigami defect patterns can be used to tune the mechanical properties of h-BN and other nano 2D structures, potentially expanding their applications in bio-compatible strain-engineered nanodevices and nanoelectronics.

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A Cellular Kirigami Morphing Wingbox Concept

Cited by 58 publications

References 29 publications

A piezo-shunted kirigami auxetic lattice for adaptive elastic wave filtering

A piezo-shunted kirigami auxetic lattice for adaptive elastic wave filtering

Manufacture of Arbitrary Cross-Section Composite Honeycomb Cores Based on Origami Techniques

Super stretchable hexagonal boron nitride Kirigami

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