Results 21 to 30 of about 547 (170)
Shock Wave Formation and Cloaking in Hyperelastic Rods
Applied Sciences, 2023 The analysis of propagating an initially harmonic acoustic pulse in a semi-infinite hyperelastic rod obeying the Yeoh strain energy potential reveals attenuation with distance of the wave amplitudes caused by the elastic energy dissipation due to forming
Sergey V. Kuznetsov
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Crystals, 2020 In the past two decades, acoustic metamaterials have garnered much attention owing to their unique functional characteristics, which are difficult to find in naturally available materials. The acoustic metamaterials have demonstrated excellent acoustical
Sanjay Kumar, Heow Pueh Lee
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Broadband acoustic double-zero-index cloaking with coupled Helmholtz resonators
New Journal of Physics, 2022 Acoustic double-zero-index metamaterials (DZIM) characterized by extremely large phase velocity along with no phase changes of the wave propagation inside the materials have received tremendous attention due to the fascinating physics and potential ...
WenQin Wang +4 more
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Perspective: Acoustic Metamaterials in Future Engineering
Engineering, 2022 Acoustic metamaterials (AMMs) are a type of artificial materials that make use of appropriate structural designs and exhibit exotic properties not found in natural materials, such as negative effective material parameters (e.g., bulk modulus, mass ...
Qiangbing Lu +4 more
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AIP Advances, 2014 Acoustic cloaks have traditionally been intended to externally surround critical objects to render these objects acoustically invisible. However, in this paper, the emphasis is placed on investigating the application of the acoustic cloaks to the interior walls of acoustic cavities in an attempt to minimize the noise levels inside these cavities.
Wael Akl, A. Baz
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High-transmission acoustic self-focusing and directional cloaking in a graded perforated metal slab
Scientific Reports, 2017 A design strategy and its modeling for high-transmission acoustic self-focusing and directional cloaking in a two-dimensional (2D) and an axisymmetric three-dimensional (3D) gradient-index phononic crystal (GRIN-PC) are reported in this paper. A gradient
Sheng-Dong Zhao +2 more
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Acoustic cloaking theory [PDF]
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2008 An acoustic cloak is a compact region enclosing an object, such that sound incident from all directions passes through and around the cloak as though the object was not present. A theory of acoustic cloaking is developed using the transformation or change-of-variables method for mapping the cloaked region to a point with vanishing scattering strength ...
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Deterministic and probabilistic deep learning models for inverse design of broadband acoustic cloak
Physical Review Research, 2021 Concealing an object from incoming waves (light and/or sound) remained science fiction for a long time due to the absence of wave-shielding materials in nature.
Waqas W. Ahmed +3 more
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The effect of shear on acoustic cloaking [PDF]
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2011 The effect of a non-zero shear modulus on two-dimensional acoustic cloaking based on the transformation technique is investigated. Using the method of multiple scales, approximate solutions are found to the elastic equations with anisotropic density when the ratio of the shear modulus to the bulk modulus is small.
Smith, John D., Verrier, Patricia E.
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Acoustic cloak constructed with thin-plate metamaterials
International Journal of Smart and Nano Materials, 2015 We propose a strategy for designing the cylindrical acoustic cloak with thin-plate metamaterials. The inhomogeneous cloaking shell as derived by transformation acoustics is first discretized into a three-layer anisotropic metafluid, and their material ...
Pei Li +4 more
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