Design and experimental verification of a water-like pentamode material

Zhao, Aiguo; Zhao, Zeyu; Zhang, Xiangdong; Cai, Xuan; Wang, Lei; Wu, Tao; Chen, Hong

doi:10.1063/1.4973924

Cited by 48 publications

(29 citation statements)

References 30 publications

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“…Another class of AMMs is acoustic metafluids, [65][66][67] which have anisotropic mass densities and acoustic elastic properties resembling fluids, with extraordinary broadband capabilities. These structures provide the ability to cloak objects, which is valuable for acoustic stealth and sensing applications.…”

Section: Types Of Structuresmentioning

confidence: 99%

“…EDM mostly machines conductive materials. High-precision EDM has been utilized to fabricate metafluids, [66] which can exploit negative refraction using prisms [65] and support underwater cloaking. The acoustic cloak [114] in Figure 3d was made from a block of aluminum, consisting of five layers of unit cells with the smallest rib thickness of 0.35 mm.…”

Section: Machiningmentioning

confidence: 99%

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Fabricating and Assembling Acoustic Metamaterials and Phononic Crystals

et al. 2020

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Acoustic metamaterials (AMMs) and phononic crystals (PCs) have garnered significant attention in recent years, as part of the collective driving force toward creating intelligent acoustic devices. Advancements in these fields have greatly enhanced the way we manipulate sound waves through transmission, reflection, refraction, absorption, diffraction, or attenuation. In the past decade, AMMs and PCs have enabled novel applications such as acoustic lensing, [1-3] cloaking, [4] levitation, [5] and holography. [6-8] While these exotic structures have been well explored through theoretical and numerical analysis, [9-13] their physical realization is an important topic that is rarely discussed. Considering the ubiquity of sound and the powerful capabilities of AMMs and PCs, the impact of these acoustic structures could be phenomenal. Across the full acoustic frequency spectrum, practical applications such as noise cancellation, [14] underwater detection, [15] medical imaging, [16] and energy harvesting [17,18] could benefit key sectors in our society like healthcare, well-being, environmental sustainability, and security. Moreover, AMMs and PCs can help to usher in next-generation technologies for personalized, immersive multisensory [19-22] experiences. The manipulation of sound can enrich the way we communicate and interact with our surroundings, not simply through audio, but also through tactile sensations. In the future, AMMs and PCs could be used in virtual reality (VR) setups, [23] compact wearable devices, and dynamic midair volumetric displays [24] that are controllable and capable of providing haptic feedback. [25] Beyond the notion that AMMs and PCs can replace phased arrays, they could readily complement one another for more precise control. In commercial devices, AMM and PC functionalities could even be combined together in different ways, e.g., transmissive and sound absorptive structures, for improved performance. To unlock the full potential of AMMs and PCs, it is therefore vital to ensure that practical, physical realization is pursued alongside theoretical investigation in the development of viable acoustic designs. Building an AMM or PC requires some form of fabrication or assembly or both. Fabrication refers to the technologies and processes used to manufacture an object, whereas assembly refers to the strategic amalgamation of parts for a constructive purpose.

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Section: Types Of Structuresmentioning

confidence: 99%

Section: Machiningmentioning

confidence: 99%

Fabricating and Assembling Acoustic Metamaterials and Phononic Crystals

et al. 2020

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“…In theory, the acoustic metamaterials composed of such a periodic arrangement of structural units can achieve a perfect match with water. Therefore, the characteristics of adjustable modulus anisotropy, solid characteristics and wide frequency endow the PMs with excellent sound wave control capabilities, which have important potential applications in the fields of sound wave control, earthquake protection, vibration and noise reduction [2,[4][5][6][7][8][9][10][11][12][13][14] .…”

Section: Introductionmentioning

confidence: 99%

The Ultra-low Frequency and Broad Band Gaps Characteristics of Multilayer Composite Cylindrical Three-dimensional pentamode metamaterials

Cai

Wang

et al. 2021

Preprint

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For three-dimensional pentamode metamaterials, it is of great significance to realize underwater ultra-low frequency acoustic wave control. Therefore, two types multilayer composite cylindrical three-dimensional pentamode metamaterials with ultra-low frequency and broad band gaps are proposed in this paper. By using pentamode metamaterials with lattice constants on the order of centimeters, the phononic band gaps below 60 Hz and the single-mode area below 30Hz can be obtained. Compared with asymmetrical double-cone locally resonant pentamode metamaterials, the lower edge frequency, relative bandwidth and figure of merit of the first phononic band gap can be reduced by up to 61.4%, 10.3% and 40.6%, respectively. It will provide reference and guidance for the engineering application of pentamode metamaterials in controlling the ultra-low frequency broadband acoustic waves, vibration and noise reduction.

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“…Pentamode metamaterial, used for acoustic cloaking, was first proposed by Milton and Cherkaev (1995). Zhao et al. (2017) designed a new two-dimensional pentamode metamaterial whose effective density is approximately equal to that of water – the tests indicate that the proposed pentamode structure can effectively reduce acoustic target strength of an invisible body but cannot realize broadband underwater cloaking.…”

Section: Introductionmentioning

confidence: 99%

A low frequency underwater metastructure composed by helix metal and viscoelastic damping rubber

Gao

Yong-Yan

2018

Journal of Vibration and Control

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We report an underwater metastructure with excellent acoustic absorption that is constructed by perforating a helix structure into viscoelastic damping rubber. Finite element method results show that this metastructure can achieve the low frequency and broadband acoustic absorption below 1000 Hz. Waveform transformation, multiple scattering, and reflection energy dissipation mechanisms are the critical factors affecting the absorption performance. Different geometries and materials of the helix structure can adjust the acoustic absorption to a great extent. The proposed metastructure provides more possibilities for underwater acoustic manipulation applications.

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Design and experimental verification of a water-like pentamode material

Cited by 48 publications

References 30 publications

Fabricating and Assembling Acoustic Metamaterials and Phononic Crystals

Fabricating and Assembling Acoustic Metamaterials and Phononic Crystals

The Ultra-low Frequency and Broad Band Gaps Characteristics of Multilayer Composite Cylindrical Three-dimensional pentamode metamaterials

A low frequency underwater metastructure composed by helix metal and viscoelastic damping rubber

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