On natural frequencies of Levy-type thick porous-cellular plates surrounded by piezoelectric layers

Askari, Majid; Saidi, A.R.

doi:10.1016/j.compstruct.2017.07.073

Cited by 28 publications

(19 citation statements)

References 31 publications

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“…The results are computed for porous-cellular plates comprised of Steel Foam, Cellular Aluminum and PZT4 (for piezoelectric layers) mainly because results are usually presented for plates composed of such materials in the literature [21,22,27]. Material properties are …”

Section: Numerical Resultsmentioning

confidence: 99%

“…[15] Moreover, the frequencies presented in the table indicates that they are more consistent with the ones calculated by Rouzegar and Abad [32] due to the type of plate theory. The accuracy of this approach is further investigated by performing a comparison study between its results for Levy-type boundary conditions with those obtained by using Reddy’s third-order shear deformation plate theory [27] in Table 3. A good consistency has been observed between the results.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…Very recently, Askari et al. [27] presented a very precise analysis regarding the free vibration behavior of sandwich plates with porous-cellular core surrounded by piezoelectric layers by considering a nonlinear porosity distribution for the core plate as well as a higher-order shear deformation plate theory.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An investigation over the effect of piezoelectricity and porosity distribution on natural frequencies of porous smart plates

Askari

Saidi

Rezaei

2018

Jnl of Sandwich Structures & Materials

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The eigenvibration characteristics of a smart plate with piezoelectric layers and porous-cellular core are investigated in the present article. The core plate is assumed to be composed of materials that contain pores and the porosities may be distributed according to different mathematical rules. Variational principle is applied in order to derive the continuous system equations on the basis of Mindlin plate theory. A highly efficient analytical modeling for eigenfrequency analysis of the smart plate is presented under the assumption that both Skempton’s pore pressure coefficient and normal elongation through the thickness are negligible. Unlike numerical methods that require huge computational cost, this approach enables us to find the system’s response for rectangular plates with arbitrary dimensions. To examine the validity of the present framework, multiple comparison studies are made between the extracted results and those available in the literature. It is shown that the type of porosity distribution influences strongly on the way that frequency changes. Furthermore, it is found out that it is necessary to consider electrical effects for plates with open circuit condition unlike the other electrical condition.

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Section: Numerical Resultsmentioning

confidence: 99%

Section: Numerical Resultsmentioning

confidence: 99%

See 1 more Smart Citation

An investigation over the effect of piezoelectricity and porosity distribution on natural frequencies of porous smart plates

Askari

Saidi

Rezaei

2018

Jnl of Sandwich Structures & Materials

View full text Add to dashboard Cite

show abstract

“…It should be noted that in both bimorph and unimorph sandwich structures considered in this study, the piezoelectric layers and the substrate are assumed to be perfectly bonded together with an adhesive layer of negligible thickness, therefore there is no relative displacement between the layers of the sandwich panel. This assumption has been considered in a wide range of published works in this field [15,[50][51][52][53][54][56][57][58][59][60][61][62][63][64][65][66].…”

Section: Kinematic Assumptionsmentioning

confidence: 99%

“…It is assumed that the material properties such as elasticity modulus and mass density in the host layer are varied through the thickness direction due to the existence of internal pores. Various rules are presented in the literature to model the variation of mechanical properties in porous materials [30,[35][36][37][38][39][40][65][66][67]. However, the effective Young's modulus E(z), shear elastic modulus G(z) and mass density ρ(z) within the porous substrate are considered to have the following nonlinear variations along the thickness [67]:…”

Section: (A)mentioning

confidence: 99%

Electromechanical Vibration Characteristics of Porous Bimorph and Unimorph Doubly Curved Panels

2020

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The aim of this study is developing an analytical solution for the free vibration of piezoelectric bimorph and unimorph doubly curved panels with a porous substrate. The panel is assumed to be relatively thick, and the effects of its shear deformation are taken into account. Nonlinear models are considered to describe the variation of mechanical properties and of the electric potential within porous host and piezoelectric layers, respectively. Furthermore, short and open circuit electrical conditions are studied to predict the frequency response for sensing and actuation applications. Employing the first-order shear deformation theory (FSDT), in conjunction with the Hamilton’s variational principle and Maxwell’s equation allows deriving six highly coupled partial differential equations to describe the system dynamics under electromechanical coupling. After analytically solving those equations for simply supported panels, the system frequency response is investigated, for various values of design parameters such as porosity, electrical boundary conditions, and geometry. Moreover, some types of smart panels, including bimorphs and unimorphs layouts, are analyzed. The analysis confirms that the above-mentioned parameters play major roles in the natural frequency response of this system and must be carefully considered in the mechatronic design of this smart structure, although they allow to tailor the system behaviour to the selected application.

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Recent Progress in Development of Wearable Pressure Sensors Derived from Biological Materials

Pan

Lee

2021

Adv Healthcare Materials

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This review summarizes recent progress in the use of biological materials (biomaterials) in wearable pressure sensors. Biomaterials are abundant, sustainable, biocompatible, and biodegradable. Especially, many have sophisticated hierarchical structure and biological characteristics, which are attractive candidates for facile and ecologically‐benign fabrication of wearable pressure sensors that are biocompatible, biodegradable, and highly sensitivity. The biomaterials and structures that use them in wearable pressure sensors that exploit sensing mechanisms such as piezoelectric, triboelectric, piezoresistive and capacitive effects are present. Finally, remaining impediments are discussed to use of biomaterials in wearable pressure sensors.

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On natural frequencies of Levy-type thick porous-cellular plates surrounded by piezoelectric layers

Cited by 28 publications

References 31 publications

An investigation over the effect of piezoelectricity and porosity distribution on natural frequencies of porous smart plates

An investigation over the effect of piezoelectricity and porosity distribution on natural frequencies of porous smart plates

Electromechanical Vibration Characteristics of Porous Bimorph and Unimorph Doubly Curved Panels

Recent Progress in Development of Wearable Pressure Sensors Derived from Biological Materials

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