Comparison Between Applied Theory and Final Element Method for Energy Harvesting Non-homogeneous Piezoelements Modeling

2017 ◽  
pp. 473-484 ◽  
Author(s):  
Arkadiy N. Soloviev ◽  
Pavel A. Oganesyan ◽  
A. S. Skaliukh ◽  
Le V. Duong ◽  
Vijay Kumar Gupta ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Applied Theory ◽  
Element Method

Modeling Energy Harvesting Devices with Non-Uniformly Polarized Piezoceramic Materials

2019 ◽  
Vol 889 ◽  
pp. 322-328
Author(s):  
Arkady N. Soloviev ◽  
Le Van Duong ◽  
P.A. Oganesyan ◽  
E.V. Kirillova
Keyword(s):  
Finite Element ◽  
Energy Harvesting ◽  
Numerical Experiments ◽  
Output Voltage ◽  
Forced Oscillations ◽  
Applied Theory ◽  
Geometrical Parameters ◽  
Longitudinal Polarization ◽  
Advanced Analysis ◽  
Energy Harvesting Devices

Non-uniformly polarized piezoceramic materials can be used in effective energy harvesting devices. Axisymmetric and plane models of electro elastic bodies were studied using applied theory and finite element method (FEM). Applied theory for devices made of parts with longitudinal and transverse polarization was developed. It was based on bending of electro elastic plates models. Numerical experiments for FEM models were performed in ACELAN package. Comparison of applied theory and FEM results showed satisfactory accuracy. First model consists of three parts: transversally polarized part and two parts with opposite longitudinal polarization. It was compared with uniformly polarized model of the same size. Both electro-mechanical coupling coefficient and output voltage produced by forced oscillations were greater in case of non-uniform polarization. Geometrical parameters – such as relative size of parts, electrode positioning and thickness of the device - were varied in series of numerical experiments to determine range of applicability for developed models and to perform initial analyses of most effective set of parameters. Model was analyzed for different boundary conditions. Automation tools for applied theory computations were developed. Second model is a disk with transvers polarization in the central part and opposite longitudinal polarization in two layers of outer part. It also showed output voltage growth. Appling polarization to the device is an important part of manufacturing process. In some cases, parts can be polarized with imperfections as incomplete polarization of deviation of polarization direction. Polarization process for predefined model geometry and electrode scheme can be performed in ACELAN package. Vector field of the polarization were transferred to finite element meshes and used for solving problems with non-uniform polarization. Difference between simplified block model presented in applied theory and full model solved with FEM was estimated. Some problems can be reduced from full to simplified model without significant accuracy loss. Described programs, models and techniques are developed for advanced analysis of non-uniformly polarized energy storage devices.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

Gear Geometry and Applied Theory

2004 ◽  
Author(s):  
Faydor L. Litvin ◽  
Alfonso Fuentes
Keyword(s):  
Applied Theory ◽  
Gear Geometry
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