Numerical simulation of the nonlinear static behavior of composite sandwich beams with a magnetorheological elastomer core

Aguib, Salah; Nour, Abdelkader; Benkoussas, B.; Tawfiq, Imad; Djedid, Toufik; Chikh, N.

doi:10.1016/j.compstruct.2015.11.075

Cited by 39 publications

(20 citation statements)

References 19 publications

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“…In this work, the following assumptions are used to derive the equations of motion [33, 34]: The core and facesheets are fully bonded. Thus, there is no slippage at the interfaces between them. The transverse displacements are the same for every point on a cross-section. The normal stress in the MR core is neglected because Young’s modulus of the MR fluid is negligibly small compared to that of the multi-scale three-phase composite facesheets. …”

Section: Coupled Mr Sandwich Beamsmentioning

confidence: 99%

“…According to the Euler–Bernoulli beam theory, the displacement field of sandwich beam can be expressed as follows [33]: where u and w are the axial and transverse displacement of beam, respectively. Also, i is related to each layer of sandwich beam ( i = t , c , b ).…”

Section: Coupled Mr Sandwich Beamsmentioning

confidence: 99%

“…The kinetic energy due to the MR core, top and bottom multi-scale three-phase composite facesheets can be expressed as follows [33]: …”

Section: Equations Of Motion Based On Hamilton’s Principlementioning

confidence: 99%

See 2 more Smart Citations

Vibration behavior of visco-elastically coupled sandwich beams with magnetorheological core and three-phase carbon nanotubes/fiber/polymer composite facesheets subjected to external magnetic field

Arani

Zarei

Eskandari

et al. 2017

Jnl of Sandwich Structures & Materials

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In the present research, modeling and vibration analysis of the double of sandwich beams which are coupled by visco-Pasternak medium are investigated. Also, this system is rested on Winkler foundation. Sandwich beams consist of magnetorheological core and carbon nanotubes/fiber/polymer composite facesheets. The material properties of magnetorheological core are obtained using the experimental data available in literature. Halpin–Tsai model is utilized to determine the material properties of carbon nanotubes/fiber/polymer composite facesheets. Hamilton principle is used to obtain the equations of motion of this system. Based on Navier’s method, a closed-form solution is presented for free vibration analysis of coupled magnetorheological sandwich beams under simply supported boundary conditions. The effects of various parameters such as core-to-facesheets thickness ratio, length-to-thickness ratio, magnetic field intensity, volume fractions of carbon nanotubes, and fibers and visco-Pasternak coefficients on the natural frequencies and loss factors of coupled system are discussed. The results show that the modal loss factor, unlike natural frequency, decreases by increasing magnetic field intensity. These findings can be used in design and manufacturing of sandwich structures.

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Section: Coupled Mr Sandwich Beamsmentioning

confidence: 99%

Section: Coupled Mr Sandwich Beamsmentioning

confidence: 99%

See 1 more Smart Citation

Vibration behavior of visco-elastically coupled sandwich beams with magnetorheological core and three-phase carbon nanotubes/fiber/polymer composite facesheets subjected to external magnetic field

Arani

Zarei

Eskandari

et al. 2017

Jnl of Sandwich Structures & Materials

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show abstract

“…Examples include adaptive lenses, interactive man-machine interfaces, damping devices and variable stiffness supports. Thus, the development of the use of composite materials in structures requires putting in place the necessary tools for modeling the dynamic [18,19] or static [20] behaviors of new structures such as sandwich structures in magnetorheological elastomer. In civil or mechanical engineering, the search for effective damping in a wide range of vibration frequencies is a critical issue to prevent human and material losses.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation and experimental analysis of magneto-mechanical behavior of anti-seismic active sandwich structure

Zerrouni¹,

Aguib²,

Grine³

et al. 2019

J. vibroeng.

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This work focuses on the quasi-static behavior study for simply supported sandwich beams with aluminum faces and magnetorheological elastomer core subjected to three points bending subjected to a magneto-mechanical loading by numerical and experimental investigations. The mechanical properties of the magnetorheological elastomer core are measured experimentally and the mechanical behavior of the MRE was identified by the generalized Maxwell rheological model. Depending upon the adjustable properties of the beam, energy dissipation is by core shear. A systematic series of experiments and finite elements simulations have been performed in order to assess the static behavior of the beam. The results obtained show a significant influence of the magnetic field intensity on the flexural displacement of the beam.

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“…They utilized the harmonic balance method to indicate the instability regions of the sandwich beam for the principal parametric resonance case. Numerical simulation of the nonlinear static behavior of composite sandwich beams with a MR ER core and aluminum skins were done by Aguib et al. (2015).…”

Section: Introductionmentioning

confidence: 99%

Vibration response of viscoelastic sandwich plate with magnetorheological fluid core and functionally graded-piezoelectric nanocomposite face sheets

Arani

Zarei

Haghparast

2018

Journal of Vibration and Control

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In this research, vibration analysis of a viscoelastic sandwich plate rested on a visco-Pasternak foundation is investigated. Sandwich plate consists of a magnetorheological (MR) fluid core and viscoelastic nanocomposite face sheets which include piezoelectric matrix and functionally graded carbon nanotubes (FG-CNTs) fiber. Core and face sheets are affected by applying magnetic and electric fields, respectively. The elastic medium is simulated by a visco-Pasternak model which is considered in terms of the effects of springiness, shear and damping of foundation. At first, the constitutive equations of sandwich plate are expressed by employing the geometric continuity conditions. Then, the equations of motion are derived by applying the energy method and Hamilton’s principle and an appropriate analytical approach is proposed to solve them. This approach can be considered as the different boundary conditions. Finally, the influences of various parameters such as the type of MR material, core to face sheets thickness ratio, volume fractions and symmetric distributions of CNTs in face sheets, magnetic and electric fields, viscoelastic constant of face sheets and elastic medium on the dimensionless natural frequencies of sandwich plate are studied. The results show that increasing core-to-face sheet thickness ratio leads to a decrease in the natural frequencies because the MR fluid core is softer than nanocomposite face sheets. Thus, the MR fluid core acts like a damper. Also, the loss factor of the MR fluid core decreases with increasing magnetic field intensity, and consequently, the natural frequency grows. In addition, increasing the volume fraction of CNTs causes the stiffness of the structure to increase. The results of this research can be utilized to realize applicable semi-active devices with controllable stiffness.

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Numerical simulation of the nonlinear static behavior of composite sandwich beams with a magnetorheological elastomer core

Cited by 39 publications

References 19 publications

Vibration behavior of visco-elastically coupled sandwich beams with magnetorheological core and three-phase carbon nanotubes/fiber/polymer composite facesheets subjected to external magnetic field

Vibration behavior of visco-elastically coupled sandwich beams with magnetorheological core and three-phase carbon nanotubes/fiber/polymer composite facesheets subjected to external magnetic field

Numerical simulation and experimental analysis of magneto-mechanical behavior of anti-seismic active sandwich structure

Vibration response of viscoelastic sandwich plate with magnetorheological fluid core and functionally graded-piezoelectric nanocomposite face sheets

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