scholarly journals Plasticity coupled with thermo-electric fields: Thermodynamics framework and finite element method computations

2017 ◽  
Vol 315 ◽  
pp. 50-72 ◽  
Author(s):  
Pablo Moreno-Navarro ◽  
Adnan Ibrahimbegovic ◽  
José L. Pérez-Aparicio
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Electric Fields ◽  
Thermo Electric ◽  
Element Method

scholarly journals The Finite Element Method Applied to the Magnetostatic and Magnetodynamic Problems

2020 ◽  
Author(s):  
Dang Quoc Vuong ◽  
Bui Minh Dinh
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Electric Fields ◽  
Complex Geometry ◽  
Analytic Method ◽  
The Finite Element Method ◽  
Electromagnetic Problems ◽  
Common Technique ◽  
The Finite Difference Method ◽  
Element Method

Modelling of realistic electromagnetic problems is presented by partial differential equations (FDEs) that link the magnetic and electric fields and their sources. Thus, the direct application of the analytic method to realistic electromagnetic problems is challenging, especially when modeling structures with complex geometry and/or magnetic parts. In order to overcome this drawback, there are a lot of numerical techniques available (e.g. the finite element method or the finite difference method) for the resolution of these PDEs. Amongst these methods, the finite element method has become the most common technique for magnetostatic and magnetodynamic problems.

Jet Repulsion in Multi-Jet Electrospinning Systems: From Needle to Needleless

2014 ◽  
Vol 852 ◽  
pp. 624-628 ◽  
Author(s):  
Yuan Sheng Zheng ◽  
Yong Chun Zeng
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Electric Fields ◽  
Fiber Diameter ◽  
Electrospinning Process ◽  
Experimental Results ◽  
Needleless Electrospinning ◽  
Difficult Issue ◽  
Element Method

Jet repulsion is the most difficult issue in the multineedle electrospinning process. This study aims at reducing the jet pulsion by designing the spinneret. Three different multijet electrospinning configutations are used to study the jet repulsion in multijet electrospinning process. The experimental results shows that adding a PTFE cylinder to the traditional multineedle electrospinning setup can reduce the jet repulsion, but the diameter and irregularity of the resultant fiber other increased. A needleless electrospinning setup using a multihole plate to replace the needles can reduce jet repulsion effectively, reduce fiber diameter and irregularity as well. And the electric fields of the three electrospinning configurations are simulated by finite element method to explain the experiment results.

Extended Finite-Element Method for Weak Discontinuities in Electric Fields

2016 ◽  
Vol 26 (7) ◽  
pp. 1-5 ◽  
Author(s):  
Weijie Xu ◽  
Guolin Wang ◽  
Nana Duan ◽  
Shuhong Wang ◽  
Youguang Guo ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Electric Fields ◽  
Extended Finite Element Method ◽  
Extended Finite Element ◽  
Weak Discontinuities ◽  
Element Method

Dynamic Electromechanical Field Concentrations Near Electrodes in Piezoelectric Thick Films for the Design of MEMS Mirrors

2012 ◽  
Vol 134 (5) ◽  
Author(s):  
Yasuhide Shindo ◽  
Fumio Narita ◽  
Koji Sato
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Resonant Frequency ◽  
Electric Fields ◽  
Lead Zirconate Titanate ◽  
Microelectromechanical Systems ◽  
Thick Films ◽  
Lead Zirconate ◽  
Electromechanical Field ◽  
Element Method

This paper studies the dynamic electromechanical response of piezoelectric mirrors driven by piezoelectric lead zirconate titanate (PZT) thick films both numerically and experimentally. The resonant frequency and the mirror tilt angle of piezoelectric mirrors under ac electric fields were analyzed by three-dimensional finite element method. The dynamic electromechanical field concentrations due to electrodes were also simulated and the results were discussed in detail. The mirrors consisted of four partially poled PZT unimorphs. The resonant frequency was then measured, and a comparison was made between the analysis and the experiment. The finite element method is shown to be capable of estimating the electromechanical field concentrations in the PZT films, making it a useful tool for designing future microelectromechanical systems (MEMS) mirrors.

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