Finite Element Modeling and Experimental Verification of a Suspension Electromagnetic Energy Harvester

2013 ◽  
Vol 444-445 ◽  
pp. 879-883 ◽  
Author(s):  
Shi Wei Guan ◽  
Xiao Biao Shan ◽  
Tao Xie ◽  
Ru Jun Song ◽  
Zhen Long Xu
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Power Output ◽  
Energy Harvester ◽  
Structural Parameters ◽  
Electromagnetic Energy ◽  
Experimental Results ◽  
Peak Power Output ◽  
Element Modeling ◽  
Finite Element Software

The power output characteristics of an electromagnetic energy harvester which uses magnetic levitation to produce the nonlinear vibration were investigated in this paper. A finite element model was developed in the electromagnetic finite element software MAXWELL®. The results show that the power output of the harvester was strongly influenced by its external loads and structural parameters. The experimental results show that the peak power output of the electromagnetic harvester is 8.2 mW at the resonance of 8.5 Hz under the vibration acceleration of 5m/s2. That obtained from the finite element analysis is 8.5 mW at 8.4Hz. The experimental results effectively verify the validity of the finite element modeling.

Investigation of tensile and flexural behavior of biaxial and rib 1 × 1 weft-knitted composite using experimental tests and multi-scale finite element modeling

2019 ◽  
Vol 53 (23) ◽  
pp. 3201-3215 ◽  
Author(s):  
Reza Hessami ◽  
Aliasghar Alamdar Yazdi ◽  
Abbas Mazidi
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Experimental Results ◽  
Flexural Behavior ◽  
Bending Tests ◽  
Three Point Bending ◽  
Element Modeling ◽  
Multi Scale ◽  
Scale Modeling ◽  
Composite Samples

In this study, tensile and flexural behavior of biaxial and rib weft-knitted composite is obtained numerically and experimentally. Multi-scale finite element modeling is employed to simulate the tensile and flexural behavior of composite samples. In the finite element modeling, the geometry of a unit cell of each fabric is initially modeled in ABAQUS software, and then periodic boundary conditions were applied to a unit cell. The stiffness matrix for each structure was obtained by a python code via meso scale modeling and used as input data for the macro modeling. To validate the numerical model, two types of weft-knitted fabrics (rib 1 × 1 and biaxial fabrics) are produced by a flat weft knitting machine. Epoxy resin is used to construct composite by the vacuum injection process (VIP). After that, the tensile and three-point bending tests were applied to composite samples. The experimental results showed that tensile strength and tensile modulus of biaxial composites are greater than rib composites, in both wale and course directions. Moreover, in three-point bending test, biaxial composite showed more strength and more stiffness in comparison to rib composite. Finite element results were compared to experimental results in tensile and bending tests. The results showed that good agreement with experimental results in the linear section of tensile and flexural behavior of composites. Consequently, the current multi-scale modeling can be used to predict the stiffness matrix and mechanical behavior of complex composite structures such as knitted composites.

EVALUATION OF ANALYTICAL AND FINITE ELEMENT MODELING ON PIEZOELECTRIC CANTILEVER BIMORPH ENERGY HARVESTER

2013 ◽  
Vol 37 (3) ◽  
pp. 621-629 ◽  
Author(s):  
Long Zhang ◽  
Keith A. Williams ◽  
Zhengchao Xie
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Analytical Model ◽  
Energy Harvester ◽  
Electrical Energy ◽  
Working Environment ◽  
Dynamic Responses ◽  
Power Sources ◽  
Element Modeling ◽  
Piezoelectric Cantilever

Harvesting the electrical energy from their working environment has become a feasible choice of realizing self-powered systems or providing supplementary power sources to the battery. In this paper, a pre-loaded piezoelectric cantilever bimorph (PCB) energy harvester is adopted as the research object, for which a single degree-of-freedom analytical model and finite element modeling have been carried out to study its dynamic responses. The laboratory experiments have also been performed to validate the analytical and the finite element modeling. It shows that finite element modeling has a better agreement with the experimental results than the analytical model, while the latter has a rough accuracy and can be used to obtain quick estimations of the dynamic response of the PCB energy harvester in certain cases.

Finite Element Modeling and Analysis of FRP Composite Trough

2011 ◽  
Vol 243-249 ◽  
pp. 1233-1236
Author(s):  
Lu Yang Shan ◽  
Pi Zhong Qiao
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Fe Method ◽  
Modeling And Analysis ◽  
Intended Application ◽  
Element Modeling ◽  
Finite Element Software ◽  
Performance Requirements ◽  
Frp Composite

A composite FRP trough is analyzed by finite element (FE) method. A modeling of FRP composite trough, which meets the performance requirements, is build in the commercial finite element software ANSYS. The deflection and stresses contours of the FRP trough for the intended application are obtained and discussed.

Finite Element Modeling of Cutting Force and Chip Formation During Thermally Assisted Machining of Ti6Al4V Alloy

2013 ◽  
Vol 135 (6) ◽  
Author(s):  
Yao Xi ◽  
Michael Bermingham ◽  
Gui Wang ◽  
Matthew Dargusch
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Cutting Force ◽  
Formation Process ◽  
Chip Formation ◽  
Cutting Forces ◽  
Experimental Results ◽  
Strongly Correlated ◽  
Element Modeling ◽  
Simulation Results

The improvement in machinability during thermally assisted turning of the Ti-6Al-4V alloy has been investigated using finite element modeling. A 2D thermally assisted turning model was developed and validated by comparing the simulation results with experimental results. The effect of workpiece temperature on the cutting force and chip formation process was examined. The predicted cutting forces and chip morphologies from the simulation strongly correlated with the experimental results. It was observed from the simulation that the chip forms after the coalescence of two deformed regions in the shear band and that the cyclic cutting forces are strongly related to this chip formation process.

Geometrical effect of bump resistance for flip-chip solder joints: Finite-element modeling and experimental results

2006 ◽  
Vol 35 (8) ◽  
pp. 1647-1654 ◽  
Author(s):  
S. W. Liang ◽  
Y. W. Chang ◽  
Chin Chen ◽  
Y. C. Liu ◽  
K. H. Chen ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Flip Chip ◽  
Solder Joints ◽  
Experimental Results ◽  
Element Modeling ◽  
Geometrical Effect
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