Lightweight decorated membranes as an aesthetic solution for sound insulation panels

Sampaio, Lucas Y.M.; Cerântola, Pedro C.M.; Oliveira, L.

doi:10.1016/j.jsv.2022.116971

Cited by 9 publications

(4 citation statements)

References 37 publications

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“…Artificial composites, known as phononic crystals (PnCs) and/or mechanical metamaterials, are structures designed to achieve unusual properties and applications, such as vibration control 1,2 , acoustic barriers 3,4 , wave manipulation (e.g., guiding, focusing, imaging, cloaking, and topological insulation) 5,6 , energy harvesting 7 , and negative Poisson's ratio 8 . They are typically composed by periodic arrays of inclusions embedded in a matrix 9,10 to open up band gaps arising from Bragg scattering and/or local resonance 11 .…”

Section: Introductionmentioning

confidence: 99%

Wave Attenuation in 1-D Viscoelastic Phononic Crystal Rods Using Different Polymers

et al. 2023

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The elastic wave attenuation in artificial composites, known as phononic crystals (PnCs), is an important topic in the context of wave manipulation. However, there is a lack of knowledge in the obtainment of the wave attenuation of PnCs when the viscoelastic effect of different polymers is considered. In this study, the complex band structure of longitudinal waves in 1-D viscoelastic PnC (VPnC) rods composed by steel inclusions (elastic material) in a polymeric matrix (viscoelastic material) is investigated. The viscoelastic effect is modelled by the standard linear solid model (SLSM), which can be used to closely model the behavior of polymers for practical applications. It is also studied the influence of different polymers (i.e., epoxy, nylon, silicon rubber, natural rubber, and low density polyethylene (LDPE)) on the complex band structure of 1-D VPnC rods. The improved plane wave expansion (IPWE) and extended plane wave expansion (EPWE) are used to compute the band structure. It is observed that the viscoelastic effect influences significantly both the propagating and evanescent waves. The viscoelasticity increases the unit cell wave attenuation for most range of frequency considering all polymeric matrices. The highest unit cell wave attenuation is for the polymeric matrix of natural rubber.

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Section: Introductionmentioning

confidence: 99%

Wave Attenuation in 1-D Viscoelastic Phononic Crystal Rods Using Different Polymers

et al. 2023

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“…By tailoring the material composition and/or the spatial arrangement of the unit cell, the PnSs exhibit unusual band structure characteristics, such as Bragg scattering band gap formation. They have been also applied to vibration reduction [4][5][6], wave manipulation [7], energy harvesting [8,9], as mechanical wave filters [10], seismic wave shields [11], and acoustic barriers [12,13], among others.…”

Section: Introductionmentioning

confidence: 99%

Extended plane wave expansion formulation for viscoelastic phononic thin plates

Miranda,

Dal Poggetto,

Pugno

et al. 2023

Wave Motion

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“…Li et al (2020) measured the sound insulation of the honeycomb membrane structure with different numbers of layers. Sampaio et al (2022) designed a honeycomb-shaped supercell by assembling membranes of different shapes, which performs a wide attenuation frequency band.…”

Section: Introductionmentioning

confidence: 99%

Low-frequency sound insulation of honeycomb membrane-type acoustic metamaterials with different interlayer characteristics

Yan

Zhang

2023

Journal of Vibration and Control

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The membrane-type structure that can achieve excellent sound insulation characteristics under lightweight conditions is widely concerned, but it generally involves a small mass block attached to a thin membrane. Although this kind of design can obtain better acoustic insulation performance, the mass block will cause installation and manufacturing issues in industrial applications. This paper presents a multilayer honeycomb membrane-type acoustic metamaterial with an interlayer structure. Similar to the mass block, the interlayer structure makes less sound energy transmitted by varying the eigenmode characteristics of the membrane. Considering the integrated design of the interlayer structure, the issues of installation and manufacturing are solved and the sound transmission loss is enhanced on the fixed overall dimension and small additional mass. The results indicate that the design of interlayer structures can break the bottleneck of ultrathin and lightweight requirements. Meanwhile, the symmetry of interlayer position can lead to the shift in transmission loss valley to a higher frequency, achieving high sound insulation in a wide frequency range.

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Lightweight decorated membranes as an aesthetic solution for sound insulation panels

Cited by 9 publications

References 37 publications

Wave Attenuation in 1-D Viscoelastic Phononic Crystal Rods Using Different Polymers

Wave Attenuation in 1-D Viscoelastic Phononic Crystal Rods Using Different Polymers

Extended plane wave expansion formulation for viscoelastic phononic thin plates

Low-frequency sound insulation of honeycomb membrane-type acoustic metamaterials with different interlayer characteristics

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