Microstructure-based experimental and numerical investigations on the sound absorption property of open-cell metallic foams manufactured by a template replication technique

Zhai, Wei; Yu, Xiang; Song, Xu; Ang, Linus Yinn Leng; Cui, Fangsen; Lee, Heow Pueh; Li, Tao

doi:10.1016/j.matdes.2017.10.016

Cited by 73 publications

(33 citation statements)

References 28 publications

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“…The sound absorption and noise reduction are mainly applications of the porous metal because it has the advantages of excellent absorption performance, a wide absorption band, outstanding flame resistance, extraordinary light weight, satisfactory cost-effective ratio, and so on [1][2][3][4][5]. Hakamada et al [1] had produced the porous aluminum with a density of 0.27 g/cm 3 by the spacer method, and a sound absorption coefficient near unity was achieved by inserting an air gap back to the sample.…”

Section: Introductionmentioning

confidence: 99%

“…The porous copper was prepared by Ru et al [2] through a novel rosin curing and foaming method, and influences of resin content on the micropore structure and its sound absorption were investigated. The nickel-based superalloy open-cell foam with the controllable porosity (92-98%) and cell size (300-900 µm) was prepared by Zhai et al [3] the through template replication process, which achieved sound absorption coefficient >0.9 at the frequency >1500 Hz with a thickness of 50 mm.…”

Section: Introductionmentioning

confidence: 99%

“…Besides these common porous sound-absorbing materials [1][2][3][4][5], some novel sound absorbers have already been developed from the standard porous metal [6][7][8][9][10][11][12][13][14][15]. Bai et al [6] had attempted to improve sound absorption efficiency of the porous metal by compression, and further promote the sound absorption performance by microperforation [7].…”

Section: Introductionmentioning

confidence: 99%

“…According to the classical Johnson-Champoux-Allard model [22][23][24], major acoustic characteristic parameters for the porous material were porosity and static flow resistivity. Although the porosity is easy to obtain, it is difficult to accurately measure the static flow resistivity [3,8,[25][26][27]. Therefore, identification of the acoustic characteristic parameters, which included the porosity and static flow resistivity, were conducted through the cuckoo search algorithm [28,29] based on the experimental data of the sound absorption coefficient of the porous metal in this study.…”

Section: Introductionmentioning

confidence: 99%

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Identification of Acoustic Characteristic Parameters and Improvement of Sound Absorption Performance for Porous Metal

Yang

Shen

Duan

et al. 2020

Metals

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Porous metal is widely used in the fields of sound absorption and noise reduction, and it is a critical procedure to identify acoustic characteristic parameters and to improve sound absorption performances. Based on the constructed theoretical sound absorption model and experimental data, acoustic characteristic parameters of the porous metal were identified through the cuckoo search identification algorithm, and their reliabilities were certified through comparing with these labeled parameters and further experimental validation. By adding the microperforated metal panel in front of the porous metal, a composite sound-absorbing structure was formed, which aimed to improve the sound absorption performance of the original porous metal by optimizing the parameters. Finite element simulation and a standing wave tube measurement were conducted to validate the effectiveness and practicability of the optimal composite sound-absorbing structure. Consistencies among theoretical predictions, simulation results, and experimental data proved the effectiveness of the identification and optimization method. When the target frequency ranges were 100–1000 Hz, 100–2000 Hz, 100–3000 Hz, and 100–4000 Hz. Actual average sound absorption coefficients of the optimal composite structures were 0.5154, 0.6369, 0.6770, and 0.7378, respectively, which exhibited the obvious improvements with a tiny increase in the occupied space and a small addition in weight.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Identification of Acoustic Characteristic Parameters and Improvement of Sound Absorption Performance for Porous Metal

Yang

Shen

Duan

et al. 2020

Metals

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“…Broadband acoustic absorbers are extensively used for noise control application. These acoustic absorbers can be broadly classified into porous and resonant [1][2][3] with the latter involving Helmholtz and quarter-wave resonators [4,5], perforated panels [6], and membrane absorbers [7].…”

Section: Introductionmentioning

confidence: 99%

Acoustic absorption of passive destructive interference cavities

Arjunan

2019

Materials Today Communications

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Acoustic products are primarily designed for broadband acoustic absorption.However, frequency-dependent acoustic absorption featuring passive designbased solutions are necessary to combat the growing noise pollution.Accordingly, this research investigates the targeted creation of sound absorption as a function of geometry utilising the principle of Acoustic Interference (AI). A methodology to design freeform geometries that can create targeted acoustic absorption is presented. The effectiveness of this methodology is then experimentally validated while quantifying the influence of length, diameter and geometry orientation. The results establish that AI has the potential to create 'near perfect' sound absorption that can be customised depending on the source frequency. The design freedom revealed by this study allows the exploitation of freeform geometries as passive highefficiency sound absorbing devices.

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Solid State Porous Metal Production: A Review of the Capabilities, Characteristics, and Challenges

et al. 2018

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Porous metals have been under development for nearly a century, but commercial adoption remains limited. This development has followed two primary routes: liquid state or solid state processing. Liquid state foaming introduces porosity to a liquid or semi‐solid metal, and solid state foaming introduces porosity to a metal, which is fully solid. Either method may create pores by internal gas pressure or introducing metal around a template directly control porosity. Process optimization and commercial output has been primarily related to liquid state methods, as solid state processing is often more complex, diverse, and with lower throughput. Solid state methods, however, are often more versatile and offer greater control of pore characteristics. Ongoing advancements in solid state foaming have allowed for a wide array of metals and alloys to be made porous and the three‐dimensional structure to be precisely tailored. In general, solid state processing remains limited to niche applications, often with modest dimensions (cm scale). “Traditional” solid state processes are being further refined and extended, and continuing developments to reduce cost, increase output, and control pore characteristics are likely to produce important advancements in coming years. The extensive variability of pore quantity and morphology makes solid state processes suitable, and often preferable, for an assortment of functional and structural applications, with electrodes and biomedical devices being among the most popular in current research. Various techniques for introducing porosity, the way these methods are applied, important considerations, typical outcomes, and current applications are reviewed.

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Microstructure-based experimental and numerical investigations on the sound absorption property of open-cell metallic foams manufactured by a template replication technique

Cited by 73 publications

References 28 publications

Identification of Acoustic Characteristic Parameters and Improvement of Sound Absorption Performance for Porous Metal

Identification of Acoustic Characteristic Parameters and Improvement of Sound Absorption Performance for Porous Metal

Acoustic absorption of passive destructive interference cavities

Solid State Porous Metal Production: A Review of the Capabilities, Characteristics, and Challenges

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