scholarly journals Computer Simulation of the Diffraction of Millimeter Electromagnetic Waves to Detect Internal Defects of Products Made using Additive Technology

2018 ◽  
Vol 1 (56) ◽  
pp. 76
Author(s):  
Oleg Vladimirovich Kofnov ◽  
Eugeniy Leonidovich Lebedev ◽  
Aleksandr Vladimirovich Mikhailenko

1994 ◽  
Vol 118 (2) ◽  
pp. 921-923
Author(s):  
P. Ya. Gaponyuk ◽  
O. V. Shmal' ◽  
V. V. Kovalenko ◽  
A. E. Stolbikov






2016 ◽  
Vol 83 (3) ◽  
pp. 486-489 ◽  
Author(s):  
P. O. Vardevanyan ◽  
A. P. Antonyan ◽  
M. A. Shahinyan ◽  
M. S. Mikaelyan


2014 ◽  
Vol 14 (4) ◽  
pp. 27-30
Author(s):  
A. Drotlew ◽  
M. Garbiak ◽  
B. Piekarski

Abstract The paper presents the results of studies on the development of manufacturing technologies to cast hearth plates operating in chamber furnaces for heat treatment. Castings made from the heat-resistant G-X40CrNiSi27-4 steel were poured in hand-made green sand molds. The following operations were performed: computer simulation to predict the distribution of internal defects in castings produced by the above mentioned technology with risers bare and coated with exothermic and insulating sleeves, analysis of each variant of the technology, and manufacture of experimental castings. As a result of the conducted studies and analysis it was found that the use of risers with exothermic sleeves does not affect to a significant degree the quality of the produced castings of hearth plates, but it significantly improves the metal yield.



2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Liping Sun ◽  
Hongju Zhou ◽  
Hongwei Zhou ◽  
Guizhong Jiao ◽  
Ling Ma

Polymer modification can improve the stability and corrosion resistance of wood, but it could create defects inside wood during the modification processing. Detection of defects inside polymer-modified wood can reduce wood losses and prevent the occurring of defects. Data simulation and tomographic imaging of polymer-modified wood internal defects were carried out using electromagnetic waves with nondestructive testing. This study constructed the polymer-modified wood models, simulated the electromagnetic scattering wave, and used the total focusing method to perform tomography of the defects in the polymer-modified wood. By analyzing the imaging characteristics of different types of defects, the effectiveness of electromagnetic waves in the detection of internal defects of polymer-modified wood was proved. This method can be extended to test internal defects of other high molecular polymers.



2003 ◽  
Vol 34 (4) ◽  
pp. 231-235 ◽  
Author(s):  
S. Koshevaya ◽  
V. Grimalsky ◽  
J. Escobedo-Alatorre ◽  
M. Tecpoyotl-Torres


Sign in / Sign up

Export Citation Format

Share Document