Digitized design and mechanical property reprogrammability of multistable origami metamaterials

Liu, Zuolin; Fang, Hongbin; Jian, Xu; Wang, K.W.

doi:10.1016/j.jmps.2023.105237

Cited by 20 publications

(3 citation statements)

References 29 publications

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“…[14][15][16] However, there are still many challenging problems in this direction, such as the design and mechanism of reconfigurability, the strategies and methods of tunability implementation, and the implementation of programming and feedback control. 17 Piezoelectric materials have shown potential as a new method for designing reconfigurable elastic metasurfaces. 18,19 Through realtime sensing and wave manipulation based on piezoelectric metasurfaces, various peculiar control effects of elastic waves have been achieved.…”

Section: Introductionmentioning

confidence: 99%

A programmable metasurface based on acoustic black hole for real-time control of flexural waves

Su,

2024

Journal of Applied Physics

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The time-modulated active medium with linear independent frequency conversion method has been demonstrated to enable wave orientation and reconstruction. However, due to the symmetric scattering field, this technique requires intricate microcircuit designs. To overcome this limitation, this paper proposes a tunable piezoelectric metasurface based on acoustic black holes (ABHs) to redirect flexural wave reflections. The system can convert an incident flexural wave into a reflected wave of any direction and frequency. This is accomplished through the linear time modulation of the sensing signal, which breaks the constraints of Snell’s law inherent in traditional designs and is insensitive to the incident amplitude. The coupling of the ABH damping system with a linear independent frequency conversion mechanism allows for the conversion of an incident flexural wave into a reflected wave in any direction and frequency while also eliminating the influence of second harmonic reflection on the wave field and simplifying the time modulation circuit. In addition, this paper demonstrates arbitrary angle reflection, focusing, beam splitting, and frequency conversion of the incident wave. By improving the flexibility of elastic wave manipulation, this paper introduces a new approach for active control of elastic waves and provides a design method that can be employed in a variety of applications ranging from vibration protection of engineering structures to vibration sensing and evaluation.

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Section: Introductionmentioning

confidence: 99%

A programmable metasurface based on acoustic black hole for real-time control of flexural waves

Su,

2024

Journal of Applied Physics

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“…Material properties such as shape reconfigurability, [1] programmable piecewise stiffness, [2] multistability, [3] and reprogrammable modulus [4,5] have long been sought by researchers for functional flexibility. Today, a revolutionary idea of incorporating computing power into materials allows the integration of mechanical properties with information processing.…”

Section: Introductionmentioning

confidence: 99%

Cellular Automata Inspired Multistable Origami Metamaterials for Mechanical Learning

Liu,

Fang,

et al. 2023

Advanced Science

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Recent advances in multistable metamaterials reveal a link between structural configuration transition and Boolean logic, heralding a new generation of computationally capable intelligent materials. To enable higher‐level computation, existing computational frameworks require the integration of large‐scale networked logic gates, which places demanding requirements on the fabrication of materials counterparts and the propagation of signals. Inspired by cellular automata, a novel computational framework based on multistable origami metamaterials by incorporating reservoir computing is proposed, which can accomplish high‐level computation tasks without the need to construct a logic gate network. This approach thus eliminates the demanding requirements for the fabrication of materials and signal propagation when constructing large‐scale networks for high‐level computation in conventional mechanical logic. Using the multistable stacked Miura‐origami metamaterial as a validation platform, digit recognition is experimentally implemented by a single actuator. Moreover, complex tasks, such as handwriting recognition and 5‐bit memory tasks, are also shown to be feasible with the new computation framework. The research represents a significant advancement in developing a new generation of intelligent materials with advanced computational capabilities. With continued research and development, these materials can have a transformative impact on a wide range of fields, from computational science to material mechano‐intelligence technology and beyond.

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“…Studies have also explored the addition of extra valley creases in the Kresling pattern, enabling multiple deformation modes of the inflated structure 13 . To achieve more notable shape changes in the Miura origami, a variation strategy 14 or a digital design technique 15 have been introduced during the stacking process. Another approach involves incorporating stretchable skins into conventional folding patterns, resulting in dual-mode morphing and enhanced shape changes 16 .…”

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confidence: 99%

Approximating complex 3D curves using origami spring structures

Liu,

Zhang,

Fang

2023

Commun Eng

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Origami provides a versatile platform for creating intricate three-dimensional (3D) reconfigurable structures through folding techniques. However, the applications of origami patterns are restricted due to limited deformation modes and complex actuation. Here we explore origami spring structures as a solution to address these limitations by approximating complex 3D curves with an underactuated scheme. By doing so, we showcase the reconfigurability and versatility of origami springs while tackling control complexity. Through the introduction of virtual creases, we simplify non-rigid deformations and enable accurate descriptions of their 3D configurations. Furthermore, we develop inverse kinematics optimization algorithms to determine optimal configurations closely approximating given 3D curves with full actuation and underactuated situations. Experimental realization of various 3D curves demonstrates the feasibility and effectiveness of our proposed approach. This research could find practical utility in soft robotics, flexible mechanisms, and deployable structures.

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Digitized design and mechanical property reprogrammability of multistable origami metamaterials

Cited by 20 publications

References 29 publications

A programmable metasurface based on acoustic black hole for real-time control of flexural waves

A programmable metasurface based on acoustic black hole for real-time control of flexural waves

Cellular Automata Inspired Multistable Origami Metamaterials for Mechanical Learning

Approximating complex 3D curves using origami spring structures

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