Sequentially tunable buckling in 3D printing auxetic metamaterial undergoing twofold viscoelastic resonances

Liu, Yuheng; Lei, Ming; Lu, Haibao; Shu, Dongwei

doi:10.1088/1361-665x/ac1eac

Cited by 13 publications

(3 citation statements)

References 55 publications

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“…21,22 This was achieved by introducing redundancies within the microstructure in order to create two sets of functioning microstructures therein so that when the loading direction is reversed the functional and redundant parts of the microstructure become redundant and functional, respectively, or by creative design of metamaterials to induce different deformation mechanisms. [23][24][25][26][27][28][29] Mechanical metamaterials take advantage of geometrical properties and mechanism theories to produce more precise microstructural deformation in order to attain the desired effective properties, [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46] which include taking inspiration from ancient motifs and cultural objects. 47,48 The negativity of Poisson's ratio has many applications, and this includes the decrease of in-plane stresses of a plate undergoing synclastic deformation.…”

Section: Introductionmentioning

confidence: 99%

Metamaterials with step function Poisson's ratio at original state

Lim

2024

Proceedings of the Institution of Mechanical Engineers, Part L:

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Two mechanical metamaterials based on fragmentation-reconstitution (FR) deformation mechanism are designed herein not only to establish the condition of Poisson's ratio discontinuity but also to offer a simpler, and hence a technically more feasible, FR metamaterial. Each metamaterial consists of interconnected rigid rhombi with slits within every rhombus such that prescription of on-axis strain would fragment each rhombus unit into six sub-units, while a reversal of the strain would reconstitute every six sub-units into a single rhombus. By geometrical construction, the Poisson's ratio expressions of both metamaterials were developed for infinitesimal and finite deformations. Results show that each metamaterial has no unique Poisson's ratio at the original state, but instead has two distinct Poisson's ratio, with a consolidated value of −1 under compression but abruptly jumps to other values under tension. The observations made for these metamaterials suggest that each of them can behave as two different materials under tension and compression, thereby enabling them to function in ways that cannot be achieved by other materials and metamaterials.

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Section: Introductionmentioning

confidence: 99%

Metamaterials with step function Poisson's ratio at original state

Lim

2024

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Shape memory polymer (SMP) is one kind of the intelligent polymers which can be regain the original shape from its temporary shape in response to a specific stimulus [1]. SMPs can retain and restore their temporary shapes until the application of specific stimuli (such as temperature [2,3], electric field [4], light [5], magnetic field [6], solution [7,8], or pH printing technology, the manufacturing of multi-component metamaterial becomes feasible [22][23][24][25][26][27][28]. Mao et al have printed the folding multi-component metamaterial using SMPs [29], to realize the sequential shape recovery for multistable structure.…”

Section: Introductionmentioning

confidence: 99%

3D printing shape memory polymer of laminated multi-component metamaterial towards optimization of auxetic and shape recovery behaviors

Liu¹,

Shu²,

Lu³

2023

Smart Mater. Struct.

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With the development of multifunctional metamaterials, auxetic shape memory metamaterials have attracted extensive attentions. However, the combination of material property into structural metamaterial has not been fully understand. In this study, a 3D printing laminated multi-component metamaterial has been manufactured using the viscoelastic and elastic shape memory polymers (SMPs), to achieve a tailorable release rate of strain energy for optimization of auxetic and shape recovery behaviors. A synergistic effect of laminated structure arrangement and cell radius has been identified as the driving force to achieve the auxetic behavior (for metamaterial), high storage strain energy (for yielding strength) and release rate (for shape recovery behavior). Finally, the auxetic, yielding, and shape recovery behaviors have been experimentally tested, to verify the effectiveness of the finite element method (FEM) results. And a good agreement between them has been achieved. This study is expected to provide a design guideline for auxetic and shape recovery behaviors of laminated multi-component SMP metamaterial.

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“…A simple and repeated series arrangement can constitute a complex multi-stable system, in which each component module can be independently deployed or folded into its deployable or collapsible state. Based on a 3D printing technology [31,32], we developed a shape memory MDO metamaterial [33][34][35], which generated the shape memory effect to lock the temporary folded shape, and its mechanical properties were adjusted through geometrical parameter design and temperature control. Finally, with the aid of finite element analysis and experimental measurement, the influences of experimental parameters on the compressiontwist behaviors and shape memory effects of MDO metamaterials were quantitatively investigated.…”

Section: Introductionmentioning

confidence: 99%

Multimodal origami shape memory metamaterials undergoing compression–twist coupling

Hua

Shu

et al. 2023

Smart Mater. Struct.

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As origami structures display designable and predictable folding or unfolding shape changes, the origami-inspired mechanical metamaterials have recently been extensively investigated for applications in metamaterial engineering. There were many previous studies on the conventional hexagonal Kresling origami structures, however, there are many issues such as structural optimizations and designable strategies for the mechanical metamaterials, which have not been solved. To solve these issues, in this study, we studied the influences of crease direction, the number of sides, and unit arrangement on the origami structures. Effects of these parameters on mechanical properties and deformation behaviors of metamaterials were analyzed using finite element methods and experimental verifications. By adjusting the number of sides, the switching between monostability and bistability of the metamaterials was realized. The compression-twist coupling effect of these metamaterials can be adjustable and tailorable by arranging the chosen units in series. Designed foldable metamaterials are flexible, especially in their unfolding and folding directions, resulting in the achievement of an unstable compression state, i.e., the externally applied loads may cause the structure to unfold along the same compression path. Furthermore, shape memory polymer (SMP) has been printed using 3D printing technology to achieve the smart origami metamaterials, which endow the metamaterials with shape memory effect, self-adaptability and temperature-responsive mechanical behavior.

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Sequentially tunable buckling in 3D printing auxetic metamaterial undergoing twofold viscoelastic resonances

Cited by 13 publications

References 55 publications

Metamaterials with step function Poisson's ratio at original state

Metamaterials with step function Poisson's ratio at original state

3D printing shape memory polymer of laminated multi-component metamaterial towards optimization of auxetic and shape recovery behaviors

Multimodal origami shape memory metamaterials undergoing compression–twist coupling

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