Effects of volume fraction and diameter of hollow spheres on acoustic properties of Metallic-Hollow-Sphere/Polyurethane (MHSP) acoustic composites

Yu, Tao; Jiang, Fengchun; Zhang, Yingze; Cao, Mengxin; Qin, Ruonan; Guo, Chunhuan; Wang, Zhenqiang; Chang, Yunpeng

doi:10.1016/j.compstruct.2021.113554

Cited by 11 publications

(17 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the above formula 6, E represents the elastic modulus and μ represents the Poisson ratio. In this study, the elastic modulus and Poisson ratio of the matrix material and single layer composites were obtained from our previous researches [31][32][33][34][35] through ultrasonic method and quasi-static compression method. Table 2 lists the elastic modulus (E),…”

Section: Resultsmentioning

confidence: 99%

“…The bulk modulu B of every component can be calculated by formula 6.

B goodbreak= \frac{E}{3 \times ((), 1 goodbreak- 2 μ)}

In the above formula 6, E represents the elastic modulus and μ represents the Poisson ratio. In this study, the elastic modulus and Poisson ratio of the matrix material and single layer composites were obtained from our previous researches 31–35 through ultrasonic method and quasi‐static compression method. Table 2 lists the elastic modulus ( E ), Poisson ratio ( μ ), and bulk modulus ( B ) of SR, PU, single layer MHSSR and MSHP.…”

Section: Resultsmentioning

confidence: 99%

“…In this experiment, according to ASTM D72‐08 standard, the density of single layer material was measured by drainage method and Archimedes principle 31–35 . The density of SR, PU, single layer MHSSR and MSHP were 1.13, 1.09, 2.22, and 2.18 g·cm −3 , respectively.…”

Section: Methodsmentioning

confidence: 99%

“…The sound insulation performance of the one-dimensional phononic crystal laminated composites in this study were tested by BSWA422/477 impedance tube. The principle of sound insulation test was based on ASTM E2611-09 standard, [31][32][33][34][35] that is, the sound signal and data are collected by four microphones, and the STL was calculated by the transfer matrix method. The size of low frequency (64$1000 Hz) sample was 100 mm in diameter and 18 mm in thickness, and the high requency (1000$6300 Hz) sample is 30 mm in diameter and 18 mm in thickness.…”

Section: Characterizationmentioning

confidence: 99%

“…However, most of the above researches on one‐dimensional phononic crystals are focused on the design and theoretical analysis, there are few reports on the one‐dimensional phononic crystal with good sound insulation properties actually prepared. Recently, our team found that metallic hollow spheres can effectively improve the acoustic performance of silicone rubber, polyurethane, and aluminum alloy 31–35 . The elastic silicon rubber and the harder polyurethane may be arranged periodically to form a one‐dimensional phonon crystal.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Sound insulation of a novel laminated polymer matrix composite containing metallic hollow spheres based on phononic crystal structure design

Jiang

Cao

et al. 2021

Polymers for Advanced Techs

Self Cite

View full text Add to dashboard Cite

As a noval functional material designed and prepared artificially, one-dimensional phononic crystal has a great prospect in the field of noise reduction. In this study, a novel one-dimensional phononic crystal metamaterial based on the metallic hollow spheres (MHS)/polymer matrix laminated composites was designed and prepared.The result of impedance tube test shows that the laminated composite has excellent sound insulation performance. The incident direction of sound waves has little effect on the sound insulation performance of the laminated composites. The average sound insulation of MHSP/SR-LC (MHSP side) was 44.4% higher than that of SR and 272.0% higher than that of PU. After analysis, it can be found that the average sound insulation of laminated composites increases with the acoustic impedance increasing, but the equivalent mass density and equivalent bulk modulus have little effect on it. The metallic hollow spheres can increase the sound energy loss by extending the transmission path of sound waves, andit can also improve the sound insulation by changing the density, elastic, and hardness of SR and PU matrix to increase the resonance strength of the spring-mass oscillator. This work may open up new possibilities for the development of novel acoustic materials applied in noise control.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The bulk modulu B of every component can be calculated by formula 6.

B goodbreak= \frac{E}{3 \times ((), 1 goodbreak- 2 μ)}

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Sound insulation of a novel laminated polymer matrix composite containing metallic hollow spheres based on phononic crystal structure design

Jiang

Cao

et al. 2021

Polymers for Advanced Techs

Self Cite

View full text Add to dashboard Cite

show abstract

Recent Advances in Preparation and Structure of Polyurethane Porous Materials for Sound Absorbing Application

Dong,

Duan,

Chen

et al. 2024

Macromol. Rapid Commun.

View full text Add to dashboard Cite

Various acoustic materials have been developed to resolve noise pollution problem in many industries. Especially, materials with porous structure have been broadly used to absorb sound energy in civil construction and transportation area. Polyurethane (PU) porous materials possess excellent damping properties, good toughness and well‐developed pore structures, which have a broad application prospect in sound absorption field. This work aimed to summarize the recent progress of fabrication and structure for PU porous materials in sound absorption application. The sound absorption mechanisms of porous materials were introduced. Different kinds of structure for typical PU porous materials in sound absorption application were covered and highlighted, which included PU foam, modified PU porous materials, aerogel, templated PU and special PU porous materials. Finally, the development direction and existing problems of PU material in sound absorption application were briefly prospected. It can be expected that porous PU with high sound absorption coefficient can be obtained by using some facile methods. The design and accurate regulation of porous structures or construction of multilayer sound absorption structure will be favorably recommended to fulfill the high demand of industrial and commercial applications in the future work.This article is protected by copyright. All rights reserved

show abstract

Lightweight, hydrostatic pressure‐resistance, thermal insulating epoxy syntactic foam with a multiscale ternary structure for marine engineering application

Wang,

Liu,

Zeng

et al. 2024

Polymer Composites

View full text Add to dashboard Cite

The study of lightweight epoxy syntactic foams is of great significance for the exploitation of marine resources. In this work, glass fibers reinforced epoxy hollow spheres (GFs‐EHS) were first prepared using a template method, and a lightweight three‐phase epoxy syntactic foam (LWTP‐ESF) with a multiscale ternary structure was prepared using a molding pressing method with epoxy resin as matrix, hollow glass microspheres (HGMs), and GF‐EHS as the lightweight fillers. The effect of HGMs content on the density, uniaxial compression properties, water absorption, and thermal conductivity of obtained LWTP‐ESF was evaluated. The results indicated that the density, uniaxial compression strength, and thermal conductivity of LWTP‐ESF were consistently decreased, while the water absorption was increased with the increase in HGMs content. The highest specific compression strength and lowest thermal conductivity of LWTP‐ESF could reach 52.77 ± 0.82 MPa·cm3/g and 0.113 ± 0.005 W/(m·K), respectively. Moreover, the effect of hydrostatic pressure on the water absorption and thermal conductivity of LWTP‐ESF were also systematically analyzed. This study provides a novel system and method to prepare lightweight epoxy syntactic foams, and the prepared composites have potential applications in the field of lightweight thermal insulation materials for marine.Highlights The composites with a multiscale ternary structure were designed. The composites possessed significantly lower density and thermal conductivity. The water absorption of composites under hydrostatic pressure was evaluated. The thermal conductivity of composites under hydrostatic pressure was evaluated. The water absorption mechanism and thermal insulation mechanism were proposed.

show abstract

Effects of volume fraction and diameter of hollow spheres on acoustic properties of Metallic-Hollow-Sphere/Polyurethane (MHSP) acoustic composites

Cited by 11 publications

References 58 publications

Sound insulation of a novel laminated polymer matrix composite containing metallic hollow spheres based on phononic crystal structure design

Sound insulation of a novel laminated polymer matrix composite containing metallic hollow spheres based on phononic crystal structure design

Recent Advances in Preparation and Structure of Polyurethane Porous Materials for Sound Absorbing Application

Lightweight, hydrostatic pressure‐resistance, thermal insulating epoxy syntactic foam with a multiscale ternary structure for marine engineering application

Contact Info

Product

Resources

About