An overview of the flexoelectric phenomenon, potential applications, and proposals for further research directions

Van Minh, Phung; Thai, Le Minh; Dung, Nguyen Thai; Tounsi, Abdelouahed; Nhung, Nguyen Thi Cam; Van Thom, Do

doi:10.1007/s10999-023-09678-1

Cited by 10 publications

(2 citation statements)

References 154 publications

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“…By way of Galerkin FE discretization, the linear electro-mechanical constitutive equations were integrated into a general equation of motion for a forced structural system, and the discretization for piezoelectric analysis could be performed [20]. As is known, the finite element method is an effective way to simulate the mechanical, electric, and polarization behaviors of piezoelectric materials under static bending and dynamic vibration [41][42][43][44]. In this study, piezoelectric analysis was conducted to simulate the mechanical and electric behaviors in commercially available FE software ANSYS version 17.0.…”

Section: Multi-field Harmonic Analysis For Piezoelectric and Structur...mentioning

confidence: 99%

Thermal Hysteresis Effect and Its Compensation on Electro-Mechanical Impedance Monitoring of Concrete Structure Embedded with Piezoelectric Sensor

Li,

Ai,

Zhu

2023

Buildings

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Piezoelectric (PZT) sensors employed in the electro-mechanical impedance/admittance (EMI/EMA) technique are vulnerable to temperature variations when applied to concrete structural health monitoring (SHM). However, in practice, the ambient temperature transmitted from the air or surface to the concrete inner part is time-dependent during its monitoring process, which inflicts a critical challenge to ensure accurate signal processing for PZT sensors embedded inside the concrete. This paper numerically and experimentally investigated the thermal hysteresis effect on EMA-based concrete structure monitoring via an embedded PZT sensor. In the numerical modeling, a 3D finite element model of a concrete cube embedded with a PZT sensor was generated, where thermal hysteresis in the concrete, adhesive coat, and sensor was fully incorporated by introducing a temperature gradient. In the experiment, an equal-sized concrete cube installed with a cement-embedded PZT (CEP) sensor was cast and heated for 180 min at four temperature regimes for EMA monitoring. Experimental results, as a cogent validation of the simulation, indicated that EMA characteristics were functionally correlated to the dual effect of both heat transfer and the temperature regime. Moreover, a new approach relying on the frequency/magnitude of the maximum resonance peak in the EMA spectrum was proposed to effectively compensate for the thermal hysteresis effect, which could be regarded as a promising alternative for future applications.

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Section: Multi-field Harmonic Analysis For Piezoelectric and Structur...mentioning

confidence: 99%

Thermal Hysteresis Effect and Its Compensation on Electro-Mechanical Impedance Monitoring of Concrete Structure Embedded with Piezoelectric Sensor

Li,

Ai,

Zhu

2023

Buildings

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show abstract

“…As a pronounced enhancement, flexoelectricity is an inherent phenomenon evident in all dielectrics, including those exhibiting centrosymmetry. 2 Flexoelectricity entails the higher-order synergetic electromechanical coupling between mechanical strain gradients and electric fields, or other way round. 3 As flexoelectricity involves strain gradients, it exhibits inverse proportionality to the length scale for which flexoelectric application is being pursued.…”

Section: Introductionmentioning

confidence: 99%

A novel 3D mixed finite element for flexoelectricity in piezoelectric materials

Serrao,

Kozinov

2024

Numerical Meth Engineering

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Flexoelectricity is the intrinsic length‐scale dependent higher‐order electromechanical response of all centro‐ and non‐centro‐symmetric dielectrics, including piezoelectrics. Direct flexoelectricity is defined as the appearance of an electric field due to induced strain gradients. The numerical modeling of flexoelectricity is largely carried out using mixed FE, which has its historical foundations in strain gradient theories. However, existing finite elements are either limited to 2D or have inherited numerical instabilities due to the known saddle‐point structuring. The current work presents a numerically robust three‐dimensional mixed FE for higher‐order electromechanical applications without the use of stabilization or penalty parameters. After its verification, the new finite element is applied to the new problem of truncated semicone torsion, taking into account flexoelectricity in piezoelectric solids, and the original findings are reported. Current research reveals the complex interaction between first‐order (piezoelectricity) and higher‐order (flexoelectricity) electromechanical coupling.

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Study on the influence of manufacturing tolerance of the spring beam on the sensitivity of the two-axis MEMS accelerometer

Van Cuong,

Van Minh,

Cuong

et al. 2024

Int J Interact Des Manuf

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An overview of the flexoelectric phenomenon, potential applications, and proposals for further research directions

Cited by 10 publications

References 154 publications

Thermal Hysteresis Effect and Its Compensation on Electro-Mechanical Impedance Monitoring of Concrete Structure Embedded with Piezoelectric Sensor

Thermal Hysteresis Effect and Its Compensation on Electro-Mechanical Impedance Monitoring of Concrete Structure Embedded with Piezoelectric Sensor

A novel 3D mixed finite element for flexoelectricity in piezoelectric materials

Study on the influence of manufacturing tolerance of the spring beam on the sensitivity of the two-axis MEMS accelerometer

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