Real-time tunable negative stiffness mechanical metamaterial

Tan, Xuezhi; Chen, Shuai; Wang, Bing; Tang, Jie; Wang, Lianchao; Zhu, Shengnan; Yao, Kaili; Xu, Peifei

doi:10.1016/j.eml.2020.100990

Cited by 105 publications

(52 citation statements)

References 44 publications

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“…The stiffness, Poisson's ratio, and critical condition for the pattern transformation could be tuned by pneumatically changing the shape of the holes (Figure 10c). Similarly, Tan et al [198,199] developed a novel real-time tunable negative stiffness mechanical metamaterials consisted of urethane elastomer cavities that were able to inflate like balloons (Figure 10d). Uniaxial compression and vibration tests were performed to reveal the influence of the inner pressure on its mechanical properties.…”

Section: Pneumatic Actuation Active Mechanical Metamaterialsmentioning

confidence: 99%

“…Similarly, Tan et al. [ 198 , 199 ] developed a novel real‐time tunable negative stiffness mechanical metamaterials consisted of urethane elastomer cavities that were able to inflate like balloons (Figure 10d ). Uniaxial compression and vibration tests were performed to reveal the influence of the inner pressure on its mechanical properties.…”

Section: Active Mechanical Metamaterials Responsive For Various Stimulus Fieldsmentioning

confidence: 99%

“…d) Specimen and the deformation process of the pneumatic negative stiffness metamaterials. [ 198 ] Copyright 2020, Elsevier. e) The construction details of the inner pneumatic actuator and kirigami skin.…”

Section: Active Mechanical Metamaterials Responsive For Various Stimulus Fieldsmentioning

confidence: 99%

mentioning

confidence: 99%

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Recent Progress in Active Mechanical Metamaterials and Construction Principles

et al. 2021

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Active mechanical metamaterials (AMMs) (or smart mechanical metamaterials) that combine the configurations of mechanical metamaterials and the active control of stimuli-responsive materials have been widely investigated in recent decades. The elaborate artificial microstructures of mechanical metamaterials and the stimulus response characteristics of smart materials both contribute to AMMs, making them achieve excellent properties beyond the conventional metamaterials. The micro and macro structures of the AMMs are designed based on structural construction principles such as, phase transition, strain mismatch, and mechanical instability. Considering the controllability and efficiency of the stimuli-responsive materials, physical fields such as, the temperature, chemicals, light, electric current, magnetic field, and pressure have been adopted as the external stimuli in practice. In this paper, the frontier works and the latest progress in AMMs from the aspects of the mechanics and materials are reviewed. The functions and engineering applications of the AMMs are also discussed. Finally, existing issues and future perspectives in this field are briefly described. This review is expected to provide the basis and inspiration for the follow-up research on AMMs.

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Section: Pneumatic Actuation Active Mechanical Metamaterialsmentioning

confidence: 99%

Section: Active Mechanical Metamaterials Responsive For Various Stimulus Fieldsmentioning

confidence: 99%

Section: Active Mechanical Metamaterials Responsive For Various Stimulus Fieldsmentioning

confidence: 99%

mentioning

confidence: 99%

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Recent Progress in Active Mechanical Metamaterials and Construction Principles

et al. 2021

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“…Mechanical metamaterials are engineered structures that exhibit mechanical properties not typically found in natural materials. These properties may include a negative Poisson's ratio (auxetic materials), [1,2] negative or anisotropic stiffness, [3][4][5] multistability, [6][7][8] and shape morphing. [9,10] With these unique mechanical behaviors, promising applications have been suggested including vibration isolation, [11] packaging and distribution, [12,13] deployable structures, [14] and mechanological systems.…”

Section: Introductionmentioning

confidence: 99%

Rapid Pneumatic Control of Bimodal, Hierarchical Mechanical Metamaterials

Hyatt

Harne

2022

Adv Eng Mater

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Recent attention to pneumatically pressurized mechanical metamaterials has identified opportunity for large shape change and mechanical properties adaptation through the collective exploitation of reconfigurable internal structures and enclosed cavities. Yet, many of these ideas are found to act in smooth, continuous ways at moderate rate. This research explores a new class of bimodal, hierarchical mechanical metamaterials that exemplify rapid change of mechanical behavior by exploiting pneumatic pressure as a means to cross bifurcation. A lattice structure with periodic square cavities is presented as a model metamaterial to highlight important design considerations and mechanical behavior. An analytical model is formed to delineate the multimodal boundaries in a high‐dimensional parameter space, while numerical simulations and experiments confirm the presence of each modal characteristic. The studies reveal the high rate of change afforded by this embodiment of pressurized mechanical metamaterials and confirm the origin lay in harnessing elastic instability. Extensions to the idea are compared against the Kutzbach–Grübler criteria to articulate how other metamaterial networks may be leveraged in this way. The outcomes of this research may inspire methods for high‐rate shape and properties change via multimodal mechanical metamaterial assemblies, such as for soft robotic platforms.

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Advanced Fabrication of Mechanical Metamaterials Based on Micro/Nanoscale Technology

Chen,

Lin,

Salehi

et al. 2023

Adv Eng Mater

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In recent years, mechanical metamaterials have shown good mechanical properties such as ultra‐lightness, programmable stiffness, and tunable Poisson’s ratio through clever structural design of microstructures. Micro/nanotechnology has been used to ensure mechanical metamaterials’ fabrication quality and performance for use as structural substrates in multifunctional applications. Mechanical metamaterials are intentionally engineered with periodic microstructures in diverse shapes, allowing for the creation of complex structural substrates. However, this sophisticated design poses significant challenges in the fabrication process, particularly at the micro/nanoscale level, where current technology hinders mechanical metamaterials’ performance improvement and function realization. This review explores the fabrication processes of mechanical metamaterials using micro/nanotechnology and showcase recent progress and future trends. Particular attention is given to recent development, challenges, and future trends in advanced fabrication technologies for mechanical metamaterials. This survey aims to explain why mechanical metamaterials have significant benefits and are well‐suited as structural substrates for multifunctional applications, what advanced fabrication technologies at the micro/nanoscale have been introduced to prepare mechanical metamaterials and how to overcome manufacturing technology bottlenecks of mechanical metamaterials in terms of synthesis, materials and design method.This article is protected by copyright. All rights reserved.

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Real-time tunable negative stiffness mechanical metamaterial

Cited by 105 publications

References 44 publications

Recent Progress in Active Mechanical Metamaterials and Construction Principles

Recent Progress in Active Mechanical Metamaterials and Construction Principles

Rapid Pneumatic Control of Bimodal, Hierarchical Mechanical Metamaterials

Advanced Fabrication of Mechanical Metamaterials Based on Micro/Nanoscale Technology

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