Free vibration analysis of five-layered composite sandwich plates with two-layered viscoelastic cores

Zhai, Yanchun; Li, Yan; Liang, Shuquan

doi:10.1016/j.compstruct.2018.05.082

Cited by 39 publications

(22 citation statements)

References 28 publications

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“…It was concluded that two-cores in five-layered sandwich plate give the best damping performance compared to the three-layered sandwich plate. Ojha et al 17 did the vibration behavior of sandwich composite plate with leptadenia pyrotechnica rheological elastomer (LPRE) based on FE method. They concluded that the composite LPRE plate increases the stiffness and damping compared to isotropic LPRE plate.…”

Section: Introductionmentioning

confidence: 99%

Free vibration characteristics of multi-core sandwich composite beams: Experimental and numerical investigation

Selvaraj

Gupta

Singh

et al. 2021

Polymers and Polymer Composites

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This study investigates the free vibration responses of laminated composite sandwich beam with multi-cores using experimental and numerical methods. The laminated composite face sheets are made by using hand layup method. An experimental modal test has been carried for different configurations of multi-core sandwich beams under different end conditions. The single-core and multi-core sandwich beams has been modeled and the natural frequencies of sandwich beams are determined using ANSYS software. The numerical model is verified by comparing the obtained natural frequencies with experimental results. The numerical and experimental results indicate that the multi-core sandwich beam greatly influences the structural stiffness compared with single-core sandwich beam under different end conditions. Furthermore, the influence of several parameters such as the end conditions, thickness of the core layer, and stacking sequence on the natural frequencies of the various configurations of the multi-core sandwich beams are presented.

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Section: Introductionmentioning

confidence: 99%

Free vibration characteristics of multi-core sandwich composite beams: Experimental and numerical investigation

Selvaraj

Gupta

Singh

et al. 2021

Polymers and Polymer Composites

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“…The paper by Zhai et al [29] deals with the free vibration analysis of two kinds of five-layered composite sandwich plates with two-layered viscoelastic cores based on the first-order shear deformation theory. Vescovini and Dozio [30] presented a unified Lévy-type solution procedure using both layerwise and equivalent single layer theories for the buckling analysis of thin and thick composite plates under biaxial loads.…”

Section: Introductionmentioning

confidence: 99%

Bi-Axial Buckling of Laminated Composite Plates Including Cutout and Additional Mass

et al. 2019

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In the presented paper, a study of bi-axial buckling of the laminated composite plate with mass variation through the cutout and additional mass is carried out using the improved shear deformation theory (ISDT). The ISDT mathematical model employs a cubic variation of thickness co-ordinates in the displacement field. A realistic parabolic distribution of transverse shear strains through the plate thickness is assumed and the use of shear correction factor is avoided. A C° finite element formulation of the mathematical model is developed to analyze the buckling behavior of laminated composite plate with cutout and additional mass. As no results based on ISDT for the considered problem of bi-axial buckling of the laminated composite plate with mass variation are available in the literature, the obtained results are validated with the data available for a laminated composite plate without cutout and additional mass. Novel results are obtained by varying geometry, boundary conditions and ply orientations.

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“…This paper makes use of the Firstorder Shear Deformation Theory (FSDT), from the ESLT family, since it is extensively used for modeling thin laminated composite structures herein presented. Few recent works adopting the FSDT theory in the modelling of structures made of composite materials include, for instance, the studies of Zhang, Shi, Zha, and Wang (2018), Zhai, Li, and Liang (2018) and Kahya and Turan (2018).…”

Section: Fem-fsdt Formulationmentioning

confidence: 99%

Matrix damage detection in laminated composite structures by Discrete Wavelet Transform

2019

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The present paper seeks to enhance the potential damage detention and location of the discrete wavelet transform (DWT) in a thin laminated composite damaged by a signal derived from vibration modes. The DWT-1D is used to spatially identify (x-y plane) the damage location. The matrix damage level occurs during the impulsive load application over the analyzed structure. The finite element used is a Serendipity-type element with a rectangular shape, eight nodes and five mechanical degrees-offreedom per node, and is formulated by First-order shear Deformation Theory (FSDT). The dynamic equation of motion including internal damage is solved by the Newmark implicit integration method, considering small deformations. The results have demonstrated that discrete mother wavelets applied in dynamic modal signal processing are capable of detecting a small damage magnitude in the matrix level. The wavelet coefficients reached great amplitudes in the damaged area.

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Free vibration analysis of five-layered composite sandwich plates with two-layered viscoelastic cores

Cited by 39 publications

References 28 publications

Free vibration characteristics of multi-core sandwich composite beams: Experimental and numerical investigation

Free vibration characteristics of multi-core sandwich composite beams: Experimental and numerical investigation

Bi-Axial Buckling of Laminated Composite Plates Including Cutout and Additional Mass

Matrix damage detection in laminated composite structures by Discrete Wavelet Transform

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