Tunable auxeticity in hydrogenated carbon nanotube origami metamaterial

Cai, Jun; Shahryari, Benyamin; Akbarzadeh, A.H.

doi:10.1557/s43577-023-00545-0

Cited by 5 publications

(3 citation statements)

References 49 publications

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“…The atomic configurations and von Mises stress distribution of GMO at various mechanical strains further support that the deformation of GMO (−0.5 ≤ ε ≤ 0.5) is dominated by the kinematics of crease folding/unfolding, which contributes to the low mechanical stress. 40 Additionally, the cycle loading/unloading tests shown in Figure S4 in the Supporting Information demonstrate the reversibility of the deformation in GMO, highlighting its excellent mechanical resilience. Elastocaloric Performance of GMO across a Wide Temperature Range.…”

Section: Resultsmentioning

confidence: 90%

“…Origami, an ancient Chinese and Japanese art of paper folding, not only leads to interesting architectures , but also enables the design of metamaterials with distinctive thermomechanical properties, such as increased stretchability, negative Poisson’s ratio, negative thermal expansion coefficient, multistability, , and zero/negative stiffness . In this study, we first construct a graphene origami with a Miura-ori tessellation and conduct MD simulations to showcase the potential of origami systems for designing metamaterials with significant eC effects at the nanoscale.…”

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confidence: 99%

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Origami Metamaterials Enable Low-Stress-Driven Giant Elastocaloric Effect

Cai,

Yang,

Akbarzadeh

2023

ACS Nano

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Elastocaloric materials, capable of achieving reversible thermal changes in response to a uniaxial stress, have attracted considerable attention for applications in advanced thermal management technologies, owing to their environmental friendliness and economic benefits. However, most elastocaloric materials operating on the basis of first/ second-order phase transition often exhibit a limited caloric response, field hysteresis, and restricted working temperature ranges. This study resorts to origami engineering for realizing multifunctional metamaterials with exceptional elastocaloric effects at both nano (exemplified by computational simulations for graphene) and meso (demonstrated by experimentation on thermoplastic polyurethane elastomers) scales. The findings uncover that the graphene origami exhibits low-stress-driven reversible and giant elastocaloric effects without a hysteresis loss and with a high elastocaloric strength. These effects are achieved across a wide working temperature range (100−600 K) and are tailorable by fine-tuning the topological parameters and configurational status of the origami metamaterials. We demonstrate the scalability of the origami design strategy for magnifying the elastocaloric effect by the 3D printing of a mesoscale origami-inspired thermoplastic polyurethane metastructure that showcases enhanced elastocaloric performance at room temperature. This study presents the potential for the realization of architected elastocaloric materials through surface functionalization and origami engineering. The findings impart exciting prospects of elastocaloric origami metamaterials as the next generation of multiscale and sustainable thermal management technologies.

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Section: Resultsmentioning

confidence: 90%

mentioning

confidence: 99%

Origami Metamaterials Enable Low-Stress-Driven Giant Elastocaloric Effect

Cai,

Yang,

Akbarzadeh

2023

ACS Nano

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“…Balan et al [87] prepared a review about metamaterials and explained about auxetic tube designing. Cai et al [88] studied tunable auxeticity in carbon nanotubes and they used this method to create cylindrical tubes. There is a lot of research in this way as Huang et al [89], Suh et al [90] and Zhu et al [91].…”

Section: Laser Cuttingmentioning

confidence: 99%

Potential and applications of auxetic tubular: a review

Ramezani,

Rahmani

2024

Funct. Compos. Struct.

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Auxetic materials, possessing a negative poisson's ratio, can be arranged in various geometric configurations, such as tubular structures. Unlike conventional materials, which contract in lateral dimensions when stretched longitudinally, auxetic tubular expands in response to applied forces. This review article amalgamates the latest experimental data and insights from preceding scholarly works, offering a detailed analysis of the structural design, fabrication processes, and mechanical characteristics of auxetic tubular structures. The review encompasses an analysis of their tensile properties, comparative evaluations with different materials, impact resistance, enhanced bending, and flexibility. Furthermore, the article explores the wide-ranging applications of auxetic tubular in diverse sectors such as automobile manufacturing, aerospace, medicine, and textiles. Additionally, investigated not only new suggestions and future considerations for the advancement of these materials and structures but also a rigorous examination of the forthcoming and new challenges. This multifaceted approach distinguishes it from prior studies within the same scientific domain.

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Programmable Truncated Cuboctahedral Origami Metastructures Actuated by Shape Memory Polymer Hinges

Chen,

Shao,

Feng

et al. 2024

Advcd Theory and Sims

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Over the past few decades, origami‐inspired structures have attracted great attention across various engineering fields due to their unique geometric and mechanical characteristics. Additionally, combining origami structures with active materials is employed to achieve programmable mechanical properties and self‐reconfigurability under external stimuli. In this work, a novel family of truncated cuboctahedral origami metastructures is proposed. These designs integrate shape memory polymers (SMPs) to actively achieve programmable mechanical properties and shape memory behavior. By utilizing SMPs for the creases and stiff materials for the panels, this approach enables deformation along the creases while enhancing the overall structural robustness. The mechanical properties and shape memory processes of these structures are investigated in detail. The proposed origami metastructures exhibit a negative Poisson's ratio and demonstrate excellent energy storage capabilities. Notably, their mechanical properties can be programmed by controlling both temperature and geometric parameters. More particularly, their Poisson's ratio can be tuned within a range of zero to −1. As a result, these truncated cuboctahedral origami metastructures hold significant potential for applications across various engineering domains, particularly in composite structures and active metamaterials.

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Tunable auxeticity in hydrogenated carbon nanotube origami metamaterial

Cited by 5 publications

References 49 publications

Origami Metamaterials Enable Low-Stress-Driven Giant Elastocaloric Effect

Origami Metamaterials Enable Low-Stress-Driven Giant Elastocaloric Effect

Potential and applications of auxetic tubular: a review

Programmable Truncated Cuboctahedral Origami Metastructures Actuated by Shape Memory Polymer Hinges

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