Enhancement of the vibro-acoustic performance of anti-tetra-chiral auxetic sandwich panels using topologically optimized local resonators

Hosseinkhani, Ali; Younesian, Davood; Ranjbar, Mostafa; Scarpa, Fabrizio

doi:10.1016/j.apacoust.2021.107930

Cited by 33 publications

(10 citation statements)

References 46 publications

(56 reference statements)

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“…However, it can be found that most of the present optimizations for the acoustic metamaterial are based on theoretical modeling [ 20 , 21 , 22 ] or finite element simulation [ 23 , 24 ]. Gritsenko and Paoli [ 20 ] had proposed a novel theoretical approach to characterize bubble-based metamaterials based on the findings for a single bubble trapped in circular cavity modeled as a thin clamped plate and further conducted the theoretical optimization of the trapped-bubble-based acoustic metamaterial performance.…”

Section: Introductionmentioning

confidence: 99%

“…Tang et al [ 23 ] had built the finite element model of the perforated honeycomb-corrugation hybrid to analyze its absorption properties and research viscous-thermal energy dissipation. The anti-tetra-chiral auxetic sandwich panel and its auxetic core were studied through using full-scale finite element simulation approach by Hosseinkhani et al [ 24 ], and an equivalent homogenized model was employed to reduce the computational time of optimization problem. As is known to all, the normal constructed theoretical sound absorption model of acoustic metamaterial or metastructure is imprecise for ineluctable simplifications, approximations, hypothesis and abbreviations.…”

Section: Introductionmentioning

confidence: 99%

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Development of Adjustable Parallel Helmholtz Acoustic Metamaterial for Broad Low-Frequency Sound Absorption Band

Yang

Shen

et al. 2022

Materials

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For the common difficulties of noise control in a low frequency region, an adjustable parallel Helmholtz acoustic metamaterial (APH-AM) was developed to gain broad sound absorption band by introducing multiple resonant chambers to enlarge the absorption bandwidth and tuning length of rear cavity for each chamber. Based on the coupling analysis of double resonators, the generation mechanism of broad sound absorption by adjusting the structural parameters was analyzed, which provided a foundation for the development of APH-AM with tunable chambers. Different from other optimization designs by theoretical modeling or finite element simulation, the adjustment of sound absorption performance for the proposed APH-AM could be directly conducted in transfer function tube measurement by changing the length of rear cavity for each chamber. According to optimization process of APH-AM, The target for all sound absorption coefficients above 0.9 was achieved in 602–1287 Hz with normal incidence and that for all sound absorption coefficients above 0.85 was obtained in 618–1482 Hz. The distributions of sound pressure for peak absorption frequency points were obtained in the finite element simulation, which could exhibit its sound absorption mechanism. Meanwhile, the sound absorption performance of the APH-AM with larger length of the aperture and that with smaller diameter of the aperture were discussed by finite element simulation, which could further show the potential of APH-AM in the low-frequency sound absorption. The proposed APH-AM could improve efficiency and accuracy in adjusting sound absorption performance purposefully, which would promote its practical application in low-frequency noise control.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of Adjustable Parallel Helmholtz Acoustic Metamaterial for Broad Low-Frequency Sound Absorption Band

Yang

Shen

et al. 2022

Materials

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“…On the other hand, auxetic metamaterials has been attracted special attention in recent years because of their unusual properties and many potential applications in various fields [12] including vibroacoustic applications [16][17][18], indentation resistance, fracture toughness, variable permeability, energy absorption [11,19,20] and other engineering fields such as packaging, biomedicine, sensors, automotive engineering, etc. [13,21].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the flexural properties of sandwich beams with auxetic core

Najafi

Ahmadi

Liaghat

2022

J Braz. Soc. Mech. Sci. Eng.

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Availing cellular structures as the core of sandwich beams is an innovative approach to improve the efficiency of them. Nonetheless, the flexural characteristics of sandwich beams is affiliated to the core topology. Accordingly, choosing an appropriate core can have a significant efficacy on the performance of sandwich beams. The purpose of the present study is to assess the influence of using auxetic cores in flexural properties of sandwich beams. Specifically, experimental and finite elements approaches were implemented to evaluate the flexural behavior, energy absorption and the stiffness of fully integrated 3D printed polymeric sandwich beams, made of 'square node anti-tetra chiral, arrowhead and re-entrant auxetic cores was investigated and compared with the conventional honeycomb core.Fabrication of specimens was performed using FDM 3D printing method and three point bending tests were conducted on the printed specimens. Results indicated that selection of proper core topology has remarkable effect on the flexural properties of sandwich beams, and using auxetic core is potentially an efficient method to enhance mechanical properties of sandwich beams duo to high load bearing capacity.

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“…The design of microstructure significantly affects the realization of physical properties and wave characteristics of LRSs. In order to obtain a better material distribution of microstructure, the theory of topology optimization is introduced [28][29][30][31] .…”

Section: Introductionmentioning

confidence: 99%

Mitigation of impact force through optimisation of three-phase locally resonant structures

et al. 2022

International Journal of Mechanical Sciences

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Enhancement of the vibro-acoustic performance of anti-tetra-chiral auxetic sandwich panels using topologically optimized local resonators

Cited by 33 publications

References 46 publications

Development of Adjustable Parallel Helmholtz Acoustic Metamaterial for Broad Low-Frequency Sound Absorption Band

Development of Adjustable Parallel Helmholtz Acoustic Metamaterial for Broad Low-Frequency Sound Absorption Band

Investigation on the flexural properties of sandwich beams with auxetic core

Mitigation of impact force through optimisation of three-phase locally resonant structures

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