A finite element model for the analysis of viscoelastic sandwich structures

A finite element model is developed to investigate the vibration and damping of elastic–viscoelastic–elastic sandwich beams. Two energy dissipation mechanisms, namely the shear and compression damping, are combined in the finite element model. Numerical examples are provided to verify the finite element model. The vibration and damping characteristics of the viscoelastic sandwich beams are investigated in detail. The numerical results show that the present finite element model has a good accuracy in predicting the natural frequencies and loss factors of viscoelastic sandwich beam structures. Moreover, it shows good applicability for both the thin and relatively thick sandwich beams. Its comprehensive performance is much better than the traditional shear and compression damping models. The effect of the viscoelastic material and geometrical parameters on the natural frequencies and loss factors of elastic–viscoelastic–elastic sandwich beam is studied as well. The results obtained have some significance in engineering application.

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“…Moita et al. [9, 10] used the first- and the third-order shear deformation theory for modeling the multilayer sandwich plates. Thai et al.…”

Section: Instructionmentioning

confidence: 99%

A compression shear mixed finite element model for vibration and damping analysis of viscoelastic sandwich structures

Huang

Qin

Chu

2018

Jnl of Sandwich Structures & Materials

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“…A numerical model has been developed and validated experimentally for the vibration of a symmetric elastic-viscoelastic sandwich beam. Moita et al [7] developed a finite element model for vibration analysis of active-passive damped multilayer sandwich plates, with a viscoelastic core sandwiched between elastic layers, including piezoelectric layers. The elastic layers are modeled using the classical plate theory and the core is modeled using the ReissenerMindlin theory.…”

Section: Introductionmentioning

confidence: 99%

Forced harmonic response of viscoelastic sandwich beams by a reduction method

Boumediene

Daya

Cadou

et al. 2016

Mechanics of Advanced Materials and Structures

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International audienceThe aim of this article is to develop a reduction method to determine the forced harmonic response of viscoelastic sandwich structures at a reasonable computational cost. The numerical resolution is based on the asymptotic numerical method. This type of problem is complex, and its number of degrees of freedom is double the number of the undamped structure, leading to a high computational time. To address the problem, three reduction methods are evaluated, which differ from the projection operator. Numerical tests have been performed in the case of cantilever sandwich beams. The comparison of the results obtained by the reduction order resolution with those given by the full order resolution shows both a good agreement and a significant reduction in computational cost

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“…The relevant publications are among others the ones by DiTaranto and Blasingame [1], Mead and Markus [2] and Rao [3]. Finite element models were used for the analysis of sandwich structures in several works in the literature [4][5][6][7][8][9][10][11][12]. As far as the performances of the damping treatments are concerned, the optimal design of visco-elastic sandwich structures took importance.…”

Section: Introductionmentioning

confidence: 99%