On the flexoelectric effect on size-dependent static and free vibration responses of functionally graded piezo-flexoelectric cylindrical shells

Babadi, Asghar Faramarzi; Beni, Yaghoub Tadi; Żur, Krzysztof Kamil

doi:10.1016/j.tws.2022.109699

Cited by 30 publications

(2 citation statements)

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“…Flexoelectricity is a characteristic of dielectric materials with an inherent electrical polarization that arises from a gradient in strain [62]. Flexoelectricity is a phenomenon that exhibits a close association with piezoelectricity.…”

Section: Effects Of Flexoelectricity On Mechanical and Electric Outpu...mentioning

confidence: 99%

“…However, it is essential to note that piezoelectricity pertains to the polarization resulting from a uniform strain, whereas flexoelectricity particularly pertains to the polarization arising from a strain gradient across different points inside the material. Flexoelectricity is a nonlocal size-dependent effect [62][63][64]. In this investigation, the impact of flexoelectricity is considered insignificant due to the relatively larger size of the piezoinclusions in comparison to the scale of flexoelectric coefficients associated with the BNT materials.…”

Section: Effects Of Flexoelectricity On Mechanical and Electric Outpu...mentioning

confidence: 99%

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The influence of thermo-electromechanical coupling on the performance of lead-free BNT-PDMS piezoelectric composites

Akshayveer,

Buroni,

Melnik

et al. 2024

Smart Mater. Struct.

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In recent times, there have been notable advancements in haptic technology,particularly in screens found on mobile phones, laptops, light-emittingdiode (LED) screens, and control panels. However, it is essentialto note that the progress in high-temperature haptic applicationsis still in the developmental phase. Due to its complex phase anddomain structures, lead-free piezoelectric materials such as {\normalsize{}$Bi_{0.5}Na_{0.5}TiO_{3}$}(BNT)-based haptic technology behave differently at high temperaturesthan ambient conditions. Therefore, it is essential to investigatethe aspects of thermal management and thermal stability, as temperatureplays a vital role in the phase and domain transition of BNT material.A two-dimensional thermo-electromechanical model has been proposedin this study to analyze the thermal stability of the BNT-PDMS compositeby analyzing the impact of temperature on effective electromechanicalproperties and mechanical and electric field parameters. However,the thermo-electromechanical modelling of the BNT-PDMS composite examinesthe macroscopic effects of the applied thermal field on mechanicaland electric field parameters, as phase change and microdomain dynamicsare not considered in this model. This study analyzes the impact ofthermo-electromechanical coupling on the performance of the BNT-PDMScomposite compared to conventional electromechanical coupling. Theresults predicted a significant improvement in piezoelectric responsecompared to electromechanical coupling due to increased thermoelectriceffect in the absence of phase change and microdomain switching fortemperature boundary conditions below depolarization temperature ($T_{d}\sim200\lyxmathsym{\textcelsius}$for pure BNT material).

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Section: Effects Of Flexoelectricity On Mechanical and Electric Outpu...mentioning

confidence: 99%

Section: Effects Of Flexoelectricity On Mechanical and Electric Outpu...mentioning

confidence: 99%