Active Actuating of a Simply Supported Beam with the Flexoelectric Effect
Piezoelectric materials with the electro-mechanical coupling effect have been widely utilized in sensors, dampers, actuators, and so on. Engineering structures with piezoelectric actuators and sensors have provided great improvement in terms of vibration and noise reduction. The flexoelectric effect...
Main Authors: | , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2020-04-01
|
Series: | Materials |
Subjects: | |
Online Access: | https://www.mdpi.com/1996-1944/13/7/1735 |
id |
doaj-9bfac473a58d446c8ad5065f65b21e7a |
---|---|
record_format |
Article |
spelling |
doaj-9bfac473a58d446c8ad5065f65b21e7a2020-11-25T03:37:14ZengMDPI AGMaterials1996-19442020-04-01131735173510.3390/ma13071735Active Actuating of a Simply Supported Beam with the Flexoelectric EffectMu Fan0Hequn Min1State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210010, ChinaKey Laboratory of Urban and Architectural Heritage Conservation, Ministry of Education, School of Architecture, Southeast University, Nanjing 210096, ChinaPiezoelectric materials with the electro-mechanical coupling effect have been widely utilized in sensors, dampers, actuators, and so on. Engineering structures with piezoelectric actuators and sensors have provided great improvement in terms of vibration and noise reduction. The flexoelectric effect—which describes the coupling effect between the polarization gradient and strain, and between the strain gradient and electric polarization in solids—has a fourth-rank order tensor electro-mechanical coupling coefficient, and in principle makes the flexoelectricity existing in all insulating materials and promises an even wider application potential in vibration and noise control. In the presented work, a flexoelectric actuator was designed to actuate a simply supported beam. The electric field gradient was generated by an atomic force microscopy probe. Flexoelectric control force and moment components could be induced within the flexoelectric control layer. As flexoelectricity is size-dependent, the key parameters that could affect the actuating effect were examined in case studies. Analytical results showed that the induced flexoelectric control moment was strongly concentrated at the probe location. The controllable transverse displacement of the simply supported beam was calculated with the modal expansion method. It was found that the controllable transverse displacement was dependent on the probe location as well.https://www.mdpi.com/1996-1944/13/7/1735flexoelectric effectsimply supported beamactive actuatingsize effect |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mu Fan Hequn Min |
spellingShingle |
Mu Fan Hequn Min Active Actuating of a Simply Supported Beam with the Flexoelectric Effect Materials flexoelectric effect simply supported beam active actuating size effect |
author_facet |
Mu Fan Hequn Min |
author_sort |
Mu Fan |
title |
Active Actuating of a Simply Supported Beam with the Flexoelectric Effect |
title_short |
Active Actuating of a Simply Supported Beam with the Flexoelectric Effect |
title_full |
Active Actuating of a Simply Supported Beam with the Flexoelectric Effect |
title_fullStr |
Active Actuating of a Simply Supported Beam with the Flexoelectric Effect |
title_full_unstemmed |
Active Actuating of a Simply Supported Beam with the Flexoelectric Effect |
title_sort |
active actuating of a simply supported beam with the flexoelectric effect |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2020-04-01 |
description |
Piezoelectric materials with the electro-mechanical coupling effect have been widely utilized in sensors, dampers, actuators, and so on. Engineering structures with piezoelectric actuators and sensors have provided great improvement in terms of vibration and noise reduction. The flexoelectric effect—which describes the coupling effect between the polarization gradient and strain, and between the strain gradient and electric polarization in solids—has a fourth-rank order tensor electro-mechanical coupling coefficient, and in principle makes the flexoelectricity existing in all insulating materials and promises an even wider application potential in vibration and noise control. In the presented work, a flexoelectric actuator was designed to actuate a simply supported beam. The electric field gradient was generated by an atomic force microscopy probe. Flexoelectric control force and moment components could be induced within the flexoelectric control layer. As flexoelectricity is size-dependent, the key parameters that could affect the actuating effect were examined in case studies. Analytical results showed that the induced flexoelectric control moment was strongly concentrated at the probe location. The controllable transverse displacement of the simply supported beam was calculated with the modal expansion method. It was found that the controllable transverse displacement was dependent on the probe location as well. |
topic |
flexoelectric effect simply supported beam active actuating size effect |
url |
https://www.mdpi.com/1996-1944/13/7/1735 |
work_keys_str_mv |
AT mufan activeactuatingofasimplysupportedbeamwiththeflexoelectriceffect AT hequnmin activeactuatingofasimplysupportedbeamwiththeflexoelectriceffect |
_version_ |
1724546360517066752 |