A Study on a New Method for Flexoelectric Coefficient Estimation of the Flexoelectric Unimorph Sensing Element
Open Access
- 15 October 2021
- journal article
- research article
- Published by MDPI AG in Applied Mechanics
- Vol. 2 (4), 841-848
- https://doi.org/10.3390/applmech2040048
Abstract
In a flexoelectric sensing element using bending mode, estimation of the flexoelectric coefficient was investigated using 3-D stress/strain analysis and experiments. The proposed method uses the results (deformation and strain) from the finite element analysis (FEA). The estimated flexoelectric coefficients were compared with those obtained via the conventional method (Euler’s beam theory) under the assumption of the quasi 1-D stress field. The results show that the RMS value and standard deviation of the estimated flexoelectric coefficient for the 3-D stress field case of the sensing element are 31.51 µC/m and 0.24%, respectively. In addition, we found that the flexoelectric coefficient obtained from the results of the 3-D stress analysis is 1.8% smaller than that of the quasi-1-D stress analysis. Therefore, in order to obtain a more reliable flexoelectric coefficient in the sensing element, the results of the 3-D numerical stress analysis should be used for accurate estimation of the flexoelectric coefficient.Keywords
Funding Information
- National Research Foundation of Korea (NRF-2017R1A2B4009049).)
This publication has 14 references indexed in Scilit:
- Study on a flexoelectric microphone using barium strontium titanateJournal of Micromechanics and Microengineering, 2016
- Flexoelectric nano-generator: Materials, structures and devicesNano Energy, 2013
- Flexoelectric strain gradient detection using Ba0.64Sr0.36TiO3 for sensingApplied Physics Letters, 2012
- Scaling effect of flexoelectric (Ba,Sr)TiO3 microcantileversPhysica Status Solidi (RRL) – Rapid Research Letters, 2011
- Flexure mode flexoelectric piezoelectric compositesJournal of Applied Physics, 2009
- Piezoelectric composite based on the enhanced flexoelectric effectsApplied Physics Letters, 2006
- Flexoelectricity of barium titanateApplied Physics Letters, 2006
- Flexoelectric effect in ceramic lead zirconate titanateApplied Physics Letters, 2005
- Flexoelectric polarization of barium strontium titanate in the paraelectric stateApplied Physics Letters, 2002
- Observation of the flexoelectric effect in relaxor Pb(Mg1/3Nb2/3)O3 ceramicsApplied Physics Letters, 2001