Programming polymorphable yet stiff truss metamaterials in response to temperature

Ma, Ruizhe; Liu, Lu; Wyman, Omar; Pasini, Damiano

doi:10.1016/j.apmt.2022.101432

Cited by 4 publications

(2 citation statements)

References 45 publications

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“…By carefully tailoring the geometry and spatial arrangement of the individual units, we can program the temporal sequence of deployment events over time. Several strategies have been studied in the literature to achieve temporal morphing, such as the local application of the stimulus, [34,35] the use of differential material diffusion rates upon exposure to a global stimulus, [36,37] and the local programming of material properties. [20,38] Nevertheless, most temporal morphing concepts are limited to irreversible self-folding, and primarily require manipulation of material chemistry, such as programming the transition temperature of SMP, and/or rely on changes in the applied stimuli, such as stimulus location.…”

Section: Demonstration Of Thermally Actuated Temporal Deploymentmentioning

confidence: 99%

Contact‐Driven Snapping in Thermally Actuated Metamaterials for Fully Reversible Functionality

Pasini

2023

Adv Funct Materials

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Mechanical instability is often harnessed in mechanical metamaterials to generate a diverse range of functionalities, and can be triggered by either a mechanical or a field stimulus, such as temperature. Existing field-responsive metamaterials with snap-through instability, however, need to rely on a mechanical input to realize functional reversibility, a limitation depriving them of the capacity to operate solely via the applied field. This work demonstrates reversible snap-through instability in a bi-material framework that is exclusively driven by environmental temperature. The need for mechanical intervention is bypassed by leveraging the thermally induced contact and mismatched thermal expansion of the constituent materials. A combination of experiments, theory and simulations, unveils the physics underpinning the thermally driven snapping undergoing four successive regimes of deformation: noncontact, full contact, partial contact, and release. The advantages of the concept are showcased in two applications. The first is the development of thermal switches with ternary operation (OFF-ON-OFF) and logic functions, going beyond the capabilities of current binary switches. The second is reversible temporal morphing in deployable structures programmed to snap sequentially in multiple locked configurations at predefined values of temperature, opening the door to applications across sectors, such as deployable antennas, soft robots, and self-reconfigurable medical devices.

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Section: Demonstration Of Thermally Actuated Temporal Deploymentmentioning

confidence: 99%

Contact‐Driven Snapping in Thermally Actuated Metamaterials for Fully Reversible Functionality

Pasini

2023

Adv Funct Materials

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“…Moreover, acoustic metamaterials are used to transform acoustic waves and low frequency vibrations into electrical power [ 18 , 19 , 20 , 21 ], while metamaterials performing invisible frequencies are used to enhance the efficiency of solar cells [ 22 , 23 , 24 ]. Additionally, metamaterial sensors are used to detect thermal fluctuations and changes in order to optimize temperature control in a building [ 25 , 26 , 27 ]. Thus, modern buildings (hospitals, airports, universities, train stations, factories, trade centers, skyscrapers, etc., all of which need tremendous amounts of power) include novel technologies in order to harvest energy from various sources, such as heat, electromagnetic signals, solar energy, etc.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Metasurfaces on Building Construction Materials for Potential Electromagnetic Applications in the Microwave Band

et al. 2022

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Energy self-sufficiency, as well as optimal management of power in buildings is gaining importance, while obtaining power from traditional fossil energy sources is becoming more and more expensive. In this context, millimeter-scale metasurfaces can be employed to harvest energy from microwave sources. They can also be used as sensors in the microwave regime for efficient power management solutions. In the current study, a simple spray printing method is proposed to develop metasurfaces in construction materials, i.e., plasterboard and wood. Such materials are used in the interior design of buildings; therefore, the implementation of metasurfaces in large areas, such as walls, doors and floors, is realized. The fabricated metasurfaces were characterized regarding their electromagnetic performance. It is hereby shown that the investigated metasurfaces exhibit an efficient electromagnetic response in the frequency range (4–7 GHz), depending on the MS. Thus, spray-printed metasurfaces integrated on construction materials can potentially be used for electromagnetic applications, for buildings’ power self-efficiency and management.

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Planar bi-metallic lattice with tailorable coefficient of thermal expansion

Zhao²,

Wang³

et al. 2022

Acta Mech. Sin.

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Programming polymorphable yet stiff truss metamaterials in response to temperature

Cited by 4 publications

References 45 publications

Contact‐Driven Snapping in Thermally Actuated Metamaterials for Fully Reversible Functionality

Contact‐Driven Snapping in Thermally Actuated Metamaterials for Fully Reversible Functionality

Fabrication of Metasurfaces on Building Construction Materials for Potential Electromagnetic Applications in the Microwave Band

Planar bi-metallic lattice with tailorable coefficient of thermal expansion

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