Graded conventional-auxetic Kirigami sandwich structures: Flatwise compression and edgewise loading

Hou, Yangqing; Neville, Robin; Scarpa, Fabrizio; Remillat, Chrystel D L; Gu, Bohong; Ruzzene, Massimo

doi:10.1016/j.compositesb.2013.10.084

Cited by 192 publications

(84 citation statements)

References 49 publications

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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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Section: Introductionmentioning

confidence: 99%

Super stretchable hexagonal boron nitride Kirigami

2017

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“…An example of such model is shown in Fig. 4, which is based on the core structure illustrated in the works of Ruzzene et al [28] and Hou [29]. However, this topology is difficult to be developed into a 2D lattice with the hybrid cores distributed along two orthogonal directions.…”

Section: Design Methodsmentioning

confidence: 99%

“…The significant majority of the works dedicated to the development of cellular topologies with auxetic characteristcs is focused on evaluating fully periodic lattice patterns. Little activity has however been focused on the effects of combining auxetic and conventional cores to achieve desired behavior, and this combination of hybrid cores has been developed so far only along one dimension of the lattice [29]. However, honeycomb lattices are intrinsically twodimensional in terms of topology, and limiting the combination of different cores along one direction can only constitute a constraint in terms of dynamics characteristics.…”

Section: Introductionmentioning

confidence: 99%

Phononic band gap design in honeycomb lattice with combinations of auxetic and conventional core

Mukherjee

Scarpa

Gopalakrishnan

2016

Smart Mater. Struct.

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We present a novel design of a honeycomb lattice geometry that uses a seamless combination of conventional and auxetic cores, i.e. elements showing positive and negative Poisson's ratio. The design is aimed at tuning and improving the band structure of periodic cellular structures. The proposed cellular configurations show a significantly wide band gap at much lower frequencies compared to their pure counterparts, while still retaining their major dynamic features. Different topologies involving both auxetic inclusions in a conventional lattice and conversely hexagonal cellular inclusions in auxetic butterfly lattices are presented. For all these cases the impact of the varying degree of auxeticity on the band structure is evaluated. The proposed cellular designs may offer significant advantages in tuning high-frequency bandgap behaviour, which is relevant to phononics applications. The configurations shown in this paper may be made iso-volumetric and iso-weight to a given regular hexagonal topology, making possible to adapt the hybrid lattices to existing sandwich structures with fixed dimensions and weights. This work also features a comparative study of the wave speeds corresponding to different configurations vis-a vis those of a regular honeycomb to highlight the superior behavior of the combined hybrid lattice.

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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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Graded conventional-auxetic Kirigami sandwich structures: Flatwise compression and edgewise loading

Cited by 192 publications

References 49 publications

Super stretchable hexagonal boron nitride Kirigami

Super stretchable hexagonal boron nitride Kirigami

Phononic band gap design in honeycomb lattice with combinations of auxetic and conventional core

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

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