FLEXOELECTRIC STRAIN GRADIENT SENSING USING MICROCANTILEVERS

被引：0

作者：

Huang, Wenbin ^{[1
]}

Kim, Kyungrim ^{[1
]}

Zhang, Shujun ^{[2
]}

Yuan, Fuh-Gwo ^{[1
]}

Jiang, Xiaoning ^{[1
]}

机构：

[1] North Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA

[2] Penn State Univ, Mat Reserach Inst, University Pk, PA 16802 USA

来源：

INNOVATION & SUSTAINABILITY OF STRUCTURES, VOLS 1 AND 2 | 2011年

基金：

美国国家科学基金会;

关键词：

Flexoelectricity; strain gradient sensor; N/MEMS; BENDING ACTUATORS;

D O I：

暂无

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The flexoelectric microcantilever offers an alternate approach for the development of strain gradient sensor (SGS). The transverse flexoelectric coefficients mu(12) (sensitivity) of barium strontium titanate microcantilevers were measured at room temperature, and found to keep the same value of 8.5 mu C/m for microcantilevers with thickness ranging from 30 mu m to 1.4 mm at room temperature. The calculated effective piezoelectric electrical energy density of flexoelectric cantilevers are superior to those of their piezoelectric counterparts, suggesting that flexoelectricity induced polarization can be significantly increased as structures are scaled down due to the scale effect of strain gradient, holding promise for flexoelectric micro/nano sensing applications in civil engineering.

引用

页码：1338 / 1343

页数：6

共 20 条

[1] Next generation structural health monitoring and its integration into aircraft design
Boller, C
[J]. INTERNATIONAL JOURNAL OF SYSTEMS SCIENCE, 2000, 31 (11) : 1333 - 1349
[2] A SURVEY OF SERIOUS AIRCRAFT ACCIDENTS INVOLVING FATIGUE FRACTURE
CAMPBELL, GS
LAHEY, R
[J]. INTERNATIONAL JOURNAL OF FATIGUE, 1984, 6 (01) : 25 - 30
[3] Flexoelectric effects: Charge separation in insulating solids subjected to elastic strain gradients
Cross, LE
[J]. JOURNAL OF MATERIALS SCIENCE, 2006, 41 (01) : 53 - 63
[4] Measurement of the effective transverse piezoelectric coefficient e31,f of AlN and Pb(Zrx,Ti1-x)O3 thin films
Dubois, MA
Muralt, P
[J]. SENSORS AND ACTUATORS A-PHYSICAL, 1999, 77 (02) : 106 - 112
[5] Gharbi M., 2010, INT J SOLIDS STRUCT
[6] Hibbeler R.C., 1993, STATICS MECH MAT, V2nd
[7] KOGAN SM, 1964, SOV PHYS-SOL STATE, V5, P2069
[8] Lee D., 2011, ARXIV11063792
[9] Large flexoelectric polarization in ceramic lead magnesium niobate
Ma, W
Cross, LE
[J]. APPLIED PHYSICS LETTERS, 2001, 79 (26) : 4420 - 4422
[10] Flexoelectricity of barium titanate
Ma, Wenhui
Cross, L. Eric
[J]. APPLIED PHYSICS LETTERS, 2006, 88 (23)

← 1 2 →