scholarly journals Experimental and computational study on epoxy resin reinforced with micro‐sized OPEFB using rectangular waveguide and finite element method

2020 ◽  
Vol 14 (8) ◽  
pp. 752-758 ◽  
Author(s):  
Ahmad Mamoun Khamis ◽  
Zulkifly Abbas ◽  
Ahmad F. Ahmad ◽  
Raba'ah Syahidah Azis ◽  
Daw M. Abdalhadi ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Epoxy Resin ◽  
Rectangular Waveguide ◽  
Computational Study ◽  
Element Method

scholarly journals Effect of Material Thickness on Attenuation (dB) of PTFE Using Finite Element Method at X-Band Frequency

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Abubakar Yakubu ◽  
Zulkifly Abbas ◽  
Mansor Hashim
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Electric Field ◽  
Rectangular Waveguide ◽  
Electric Field Intensity ◽  
Reflection Coefficients ◽  
Band Frequency ◽  
Ptfe Sample ◽  
X Band ◽  
Element Method

PTFE samples were prepared with different thicknesses. Their electric field intensity and distribution of the PTFE samples placed inside a rectangular waveguide were simulated using finite element method. The calculation of transmission/reflection coefficients for all samples thickness was achieved via FEM. Amongst other observable features, result from calculation using FEM showed that the attenuation for the 15 mm PTFE sample is −3.32 dB; the 30 mm thick PTFE sample has an attenuation of 0.64 dB, while the 50 mm thick PTFE sample has an attenuation of 1.97 dB. It then suffices to say that, as the thickness of the PTFE sample increases, the attenuation of the samples at the corresponding thicknesses increases.

scholarly journals Determination Reflection and Transmission Coefficients of Lanthanum Iron Garnet Filled PVDF-Polymer Nanocomposite Using Finite Element Method Modeling at Microwave Frequencies

2012 ◽  
Vol 21 ◽  
pp. 151-157 ◽  
Author(s):  
Hasan Soleimani ◽  
Noorhana Yahya ◽  
Zulkifly Abbas ◽  
Hojjatollah Soleimani ◽  
Hasnah Mohd Zaid
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Rectangular Waveguide ◽  
Polymer Nanocomposite ◽  
Reflection And Transmission Coefficients ◽  
Fem Modeling ◽  
Reflection And Transmission ◽  
Transmission Coefficients ◽  
Iron Garnet ◽  
Element Method

In our previous work, the lanthanum iron garnet-filled PVDF-polymer nanocomposite has been prepared. The reflection and transmission coefficients of PVDF/LIG were measured using rectangular waveguide in conjunction with a microwave vector network analyzer (VNA) at X-band frequencies (8 GHz - 12 GHz). In this study, the distribution of electric field intensity of PVDF/ LIG which was loaded in rectangular waveguide was simulated based on Finite Element Method (FEM) formulation to show the essential differences of intensity of emitted electrical field. The computations of reflection and transmission coefficients of PVDF/ LIG were determined by using implementation FEM modeling rectangular waveguide. The FEM results were compared with the experimental achievement results using the rectangular waveguide. An excellent agreement between measured and simulated results was obtained based on the values of mean relative errors.

scholarly journals Axial Compression Experiments and Finite Element Analysis of Basalt Fiber/Epoxy Resin Three-Dimensional Tubular Woven Composites

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2584
Author(s):  
Liming Zhu ◽  
Huawei Zhang ◽  
Jing Guo ◽  
Ying Wang ◽  
Lihua Lyu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Epoxy Resin ◽  
Axial Compression ◽  
Three Dimensional ◽  
Maximum Load ◽  
Woven Fabrics ◽  
Woven Composites ◽  
Woven Composite ◽  
Element Method

In order to avoid the delamination of traditional tubular composite materials and reduce its woven cost, on an ordinary loom, the three-dimensional (3D) tubular woven fabrics were woven with basalt filament tows, and then the 3D tubular woven composites were prepared with epoxy resin by a hand layup process. The wall thickness of the 3D tubular woven composite was thin, and was only 2 mm thick. Through experiments and finite element method (FEM) simulation, the axial compression properties of the material were analyzed. The results show that the material 2 mm thick has good axial compression performance, the maximum load value of the experiment is 10,578 N, and the maximum load value of the finite element simulation is 11,285 N. The error between the two is 6.68%, indicating that the experiment and simulation have a good consistency. The failure mode of the material is also analyzed through finite element method simulation in the paper, thus revealing the failure stress propagation, local stress concentration, and failure morphology of the material. It provides an effective reference for the design and application of the 3D tubular woven composite.

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