Damping Properties of Sandwich Beams with Viscoelastic Layer

Cherkasov, V.D.; Yurkin, Yuriy; Avdonin, V.V.

doi:10.1088/1757-899x/262/1/012024

Cited by 2 publications

(3 citation statements)

References 5 publications

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“…32 Increased damping properties can be obtained when the beams are in a sandwich form. [33][34][35] A dip-coating method is adopted to fabricate the sandwich beams, in which graphene or graphene oxide (GO) coatings are represented as the damping core layers. Within the configuration of these designed beams, their quasi-static energy dissipations and damping loss factors exhibit remarkable 71% and 94% increases compared to pristine PU beams, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…As a demonstrator of a material substrate that would increase its energy dissipation and damping performance by using engineered wrinkled graphene, beams structures made of polyurethane (PU) have been used here due to their high intrinsic viscoelastic properties . Increased damping properties can be obtained when the beams are in a sandwich form. − A facile yet effective dip-coating method is adopted to fabricate the sandwich beams in which graphene or graphene oxide (GO) coatings are represented as the damping core layers. Within the configuration of these designed beams, their quasi-static energy dissipations and dynamic damping loss factors exhibit remarkable 71% and 94% increases, respectively, compared to pristine PU beams.…”

Section: Introductionmentioning

confidence: 99%

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Engineering Graphene Wrinkles for Large Enhancement of Interlaminar Friction Enabled Damping Capability

Qin

Wang

et al. 2019

ACS Appl. Mater. Interfaces

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Graphene nanoplates are hoped-for solid lubricants to reduce friction and energy dissipation in micro-and nano-scale devices benefiting from their interface slips to reach an expected superlubricity. On the contrary, we propose here by introducing engineered wrinkles of graphene nanoplates to exploit and optimize the interfacial energy dissipation mechanisms between the nanoplates in graphene-based composites for enhanced vibration damping performance.Polyurethane (PU) beams with designed sandwich structures have been successfully fabricated to activate the interlaminar slips of wrinkled graphene-graphene, which significantly contribute to the dissipation of vibration energy. These engineered composite materials with extremely low graphene content (~0.08wt%) yield a significant increase of quasi-static and dynamic damping compared to the baseline PU beams (by 71% and 94%, respectively). Friction force images of wrinkled graphene 2 / 33 oxide (GO) nanoplates detected via Atomic Force Microscope (AFM) indicate that wrinkles with large coefficients of friction (COFs) indeed play a dominant role in delaying slip occurrences.Reduction of GO further enhances the COFs of the interacting wrinkles by 7.8% owing to the increased effective contact area and adhesive force. This work provides a new insight on how to design graphene-based composites with optimized damping properties from the microstructure perspective.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Engineering Graphene Wrinkles for Large Enhancement of Interlaminar Friction Enabled Damping Capability

Qin

Wang

et al. 2019

ACS Appl. Mater. Interfaces

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show abstract

“…Sanliturk [16] developed a multi-layered isotropic composite finite element method to assess its damping capability. Cherkasov et al [17] examined the damping of sandwich beams of two steel sheets, connected by self-adhesive bitumen-rubber mastic. They focused on investigating the effect of the thickness of the viscoelastic layer as well as the temperature change to the damping properties in the -40°C to +80°C temperature range.…”

Section: Introductionmentioning

confidence: 99%

Damping determination by the half power bandwidth method for a rectangular flat plate with bitumen damping layer application

Treszkai¹,

Vehovszky²,

Feszty³

2021

J. vibroeng.

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Damping Loss Factor (DLF) is an important input parameter in Statistical Energy Analysis (SEA) simulations, therefore its accurate determination via measurement is crucial from simulation accuracy point of view. This paper presents a methodology for the accurate measurement of DLF via the Half Power Bandwidth Method (HPBM) for three test cases: a) a rectangular steel plate, b) the same plate with viscoelastic bitumen sheets imposed on the middle of plate and c) the same plate with the viscoelastic bitumen sheets placed randomly. The aim of the different bitumen layer applications was to develop a methodology for representing them in Statistical Energy Analysis, since this simulation technique takes into account only the coverage of the damping layers but not their distribution over a panel. Measurement of the DLF in random locations on the plate gave the appropriate parameters for the simulation. Measurement results were then applied in SEA simulations, which showed good agreement with the experimental results in all test cases, with the maximum difference of only 2 dB.

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Damping Properties of Sandwich Beams with Viscoelastic Layer

Cited by 2 publications

References 5 publications

Engineering Graphene Wrinkles for Large Enhancement of Interlaminar Friction Enabled Damping Capability

Engineering Graphene Wrinkles for Large Enhancement of Interlaminar Friction Enabled Damping Capability

Damping determination by the half power bandwidth method for a rectangular flat plate with bitumen damping layer application

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