Cancelation of acoustic scattering from a smart hybrid ERF/PZT-based double‐wall composite spherical shell structure

Hasheminejad, Seyyed M.; Jamalpoor, A.

doi:10.1080/15376494.2021.1995549

Cited by 20 publications

(2 citation statements)

References 66 publications

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“…Wang and Ma 19 and Li et al 20 probed on the sound insulation of a sandwich structure with pyramidal truss core. The structural‐acoustic performance of aerospace composites was studied by Kaidouchi et al 21 The effect of applying electric field on the sound transmission loss of multifunctional sandwich structures was assessed by Talatahari et al 22 Hasheminejad et al 23 proposed a multiphysics vibroacoustic methodology to cancel acoustic scattering from a smart composite plate. Elhami et al 24 proposed a numerical model to predict the acoustic wave transmission of smart cylindrical shells.…”

Section: Introductionmentioning

confidence: 99%

Acoustic absorption of3Dprinted glycol‐modified polyethylene terephthalate composites with organically modified montmorillonite and short carbon fibers: Experimentation andANNbased predictive strategy

Mahesh

2023

Polymer Composites

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In this article, the acoustic properties of 3D printed glycol‐modified polyethylene terephthalate (PETG) reinforced with organically modified montmorillonite (OMMT) nanoclay/short carbon fiber (SCF) nanocomposites are experimentally investigated using ASTM E1050‐08 standard. To this end, the sound absorption coefficient (SAC) of different PETG composites was calculated with the aid of two microphone impedance tube, working in the frequency range of 50–6300 Hz. The effect of different weight percentages (wt%) of OMMT nanoclay, SCFs, and 3D printing infill density on the acoustic behavior of PETG nanocomposites is studied. The experimental results reveal that higher wt% of OMMT nanoclay and SCFs has a beneficial effect on sound absorption. Further, the trend of variation of SAC is justified with morphological studies. Also, an artificial neural network (ANN) based prediction methodology to predict SAC is developed using the datasets obtained from the experimentation. Levenberg–Marquardt backward propagation algorithm with 20 neurons trains the ANN model. Using the trained ANN model, the acoustic properties of PETG/OMMT/SCF nanocomposites with different operating frequencies, infill density and wt% of reinforcements are predicted with less than 5% average error. This can be beneficial in eliminating the fabrication and experimentation costs incurred while assessing the acoustic properties of the PETG composites.Highlights PETG/OMMT nanoclay/SCF composite filaments are fabricated. Acoustic absorption of 3D printed PETG composites are experimentally studied. ANN based predictive tool is developed using experimental data. ANN tool predicts the sound absorption and reduces experimentation cost. Microstructural studies justify the trend of sound absorption.

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Section: Introductionmentioning

confidence: 99%

Acoustic absorption of3Dprinted glycol‐modified polyethylene terephthalate composites with organically modified montmorillonite and short carbon fibers: Experimentation andANNbased predictive strategy

Mahesh

2023

Polymer Composites

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“…However, they are not adaptable with respect to changes in the incident sound field and/or scatterer physical characteristics, and often lead to www.nature.com/scientificreports/ undesirably large scaled designs at low frequencies (long wavelengths). Consequently, the more robust and authoritative active cloaking procedures that can operate based on the conventional or advanced control strategies may be employed to provide a broader cloaking bandwidth at the cost of higher energy expenditure and system complexity [52][53][54] . Several researchers have recently deliberated on the subject.…”

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confidence: 99%

A novel smart hybrid multimorph piezoelectric spherical shell cloak for broadband near-perfect underwater acoustic camouflage applications

Hasheminejad,

Kasaeisani

2024

Sci Rep

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Non-visual auditory camouflage plays a major role in the art of underwater deception. In this work, a hybrid active/semi-active omnidirectional cloaking shell structure composed of alternate complementary piezoelectric and smart viscoelastic (PZT/SVE) actuator layers is proposed that can effectively conceal a three dimensional underwater macroscopic object from broadband incident sound waves. The smart hybrid structure incorporates a finite sequence of fully active parallel-connected multimorph PZT constraining layers inter-stacked with semi-active SVE core layers both of which are collaboratively operative in the framework of a Particle Swarm Optimized (PSO) multiple-input multiple-output active damping control (MIMO-ADC) scheme. The elasto-acoustic modeling of the problem is conducted by coupling the spatial state space methodology based on the classical three-dimensional exact piezoelasticity theory with the wave equations for the inner and outer acoustic domains. The acoustic cloaking performance of proposed configuration is evaluated for four distinct classes of highly functional SVE interlayer materials with tunable (field-dependent) rheological properties, namely, magnetorheological elastomer (MRE), shape memory polymer (SMP), electrorheological fluid (ERF), and magnetorheological shear thickening polishing fluid (MRSTPF). Extensive numerical results reveal significant broadband reductions of the far-field backscattering amplitude in the ($$\left|{f}_{\infty }\left(\theta =\pi ,{k}_{\text{ex}}{R}_{\text{ex }}\right)\right|)$$ f ∞ θ = π , k ex R ex ) as well as the percentage error of external cloaked field $$(\%\text{Err})$$ ( % Err ) by incorporating a sufficient number of smart multimorph PZT/SVE material layers. Furthermore, it is concluded that comparable low frequency acoustic cloaking effects is possible without expenditure of any external energy just by employing the entirely inactive MRSTPF-based cloak as an alternative to the semiactive or fully active multimorph PZT/SVE cloaks. The outcome of proposed study can advantageously serve as the first step towards practical development and experimental implementation of future high performance smart acoustic cloaking devices with expanded broadband near-perfect omnidirectional invisibility for three dimensional objects of diverse geometries.

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Application of hyperbolic differential quadrature method for vibration responses of the electrorheological disk

Wang

et al. 2023

Engineering Analysis with Boundary Elements

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Cancelation of acoustic scattering from a smart hybrid ERF/PZT-based double‐wall composite spherical shell structure

Cited by 20 publications

References 66 publications

Acoustic absorption of3Dprinted glycol‐modified polyethylene terephthalate composites with organically modified montmorillonite and short carbon fibers: Experimentation andANNbased predictive strategy

Acoustic absorption of3Dprinted glycol‐modified polyethylene terephthalate composites with organically modified montmorillonite and short carbon fibers: Experimentation andANNbased predictive strategy

A novel smart hybrid multimorph piezoelectric spherical shell cloak for broadband near-perfect underwater acoustic camouflage applications

Application of hyperbolic differential quadrature method for vibration responses of the electrorheological disk

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