Numerical simulation of electron beam relaxation in dense media

1981 ◽  
Vol 24 (10) ◽  
pp. 974-977
Author(s):  
B. V. Alekseev ◽  
S. B. Karasev ◽  
V. M. Krutilina ◽  
G. V. Nesterov
Keyword(s):  
Numerical Simulation ◽  
Electron Beam ◽  
Dense Media

Numerical Simulation of the Effects of Preheating on Electron Beam Additive Manufactured Ti-6Al-4V Build Plate

2016 ◽  
Vol 879 ◽  
pp. 274-278 ◽  
Author(s):  
Jun Cao ◽  
Philip Nash
Keyword(s):  
Numerical Simulation ◽  
Residual Stress ◽  
Finite Element ◽  
Electron Beam ◽  
Cross Section ◽  
Element Model ◽  
Normal Direction ◽  
Thermal Residual Stresses ◽  
Longitudinal Residual Stress ◽  
Middle Cross Section

In an earlier study, a 3-D thermomechanical coupled finite element model was built and experimentally validated to investigate the evolution of the thermal residual stresses and distortions in electron beam additive manufactured Ti-6Al-4V build plates. In this study, an investigation using this robust and accurate model was focused on an efficient preheating method, in which the electron beam quickly scanned across the substrate to preheat the build plate prior to the deposition. Various preheat times, beam powers, scan rates, scanning paths and cooling times (between the end of current preheat scan/deposition layer and the beginning of the next preheat scan/deposition layer) were examined, and the maximum distortion along the centerline of the substrate and the maximum longitudinal residual stress along the normal direction on the middle cross-section of the build plate were quantitatively compared. The results show that increasing preheat times and beam powers could effectively reduce both distortion and residual stress for multiple layers/passes components.

Influence of Forming Residual Stresses on the Welding Distortions of Two Thick Plates

2009 ◽  
Vol 83-86 ◽  
pp. 125-132 ◽  
Author(s):  
Sebastien Gallée ◽  
Antoine Martin ◽  
Vincent Robin ◽  
Daniel Nelias
Keyword(s):  
Numerical Simulation ◽  
Electron Beam ◽  
Heat Source ◽  
Residual Stresses ◽  
Electron Beam Welding ◽  
Initial Conditions ◽  
Rolling Process ◽  
Vacuum Vessel ◽  
Thick Plates ◽  
Simulation Results

The manufacturing of the ITER (International Thermonuclear Experimental Reactor) vacuum vessel involves the welding of thick deformed plates. The aim of this study is to investigate the influence of forming residual stresses on the welding distortions of two thick plates. The plates are deformed using a three point rolling process. A first numerical simulation is performed to investigate the residual stresses induced by this process. The forming residual stresses are taken into account as initial conditions to perform the electron beam welding simulation of a deformed plate. This simulation first requires calibrating the heat source. Two welding simulations are then performed: the first one with residual stresses and the second one without. The comparison of the simulation results points out a low effect of the residual stresses on the electron beam welding distortions. As a result, in the next electron beam welding simulations of the vacuum vessel, no forming residual stresses will be taken into account.

Numerical simulation and experiment of error field measurement using luminous trace of electron beam in SST-1

2019 ◽  
Vol 21 (10) ◽  
pp. 105101
Author(s):  
Someswar DUTTA ◽  
Y PARAVASTU ◽  
J DHONGDE ◽  
H CHUDASMA ◽  
S GEORGE ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Electron Beam ◽  
Field Measurement ◽  
Simulation And Experiment ◽  
Error Field

Analysis of Plane-Parallel Electron Beam Propagation in Different Media by Numerical Simulation Methods

2018 ◽  
Vol 60 (12) ◽  
pp. 2115-2122 ◽  
Author(s):  
I. A. Miloichikova ◽  
V. I. Bespalov ◽  
A. A. Krasnykh ◽  
S. G. Stuchebrov ◽  
Yu. M. Cherepennikov ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Electron Beam ◽  
Beam Propagation ◽  
Simulation Methods ◽  
Plane Parallel ◽  
Numerical Simulation Methods

Temperature distribution simulations during electron beam freeform fabrication process based on the fully threaded tree

2019 ◽  
Vol 25 (6) ◽  
pp. 989-997
Author(s):  
Yajun Yin ◽  
Wei Duan ◽  
Kai Wu ◽  
Yangdong Li ◽  
Jianxin Zhou ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Temperature Field ◽  
Electron Beam ◽  
Additive Manufacturing ◽  
Temperature Distribution ◽  
Design Methodology ◽  
Content Type ◽  
Freeform Fabrication ◽  
Simulation Based ◽  
Simulation Results

Purpose The purpose of this study is to simulate the temperature distribution during an electron beam freeform fabrication (EBF3) process based on a fully threaded tree (FTT) technique in various scales and to analyze the temperature variation with time in different regions of the part. Design/methodology/approach This study presented a revised model for the temperature simulation in the EBF3 process. The FTT technique was then adopted as an adaptive grid strategy in the simulation. Based on the simulation results, an analysis regarding the temperature distribution of a circular deposit and substrate was performed. Findings The FTT technique was successfully adopted in the simulation of the temperature field during the EBF3 process. The temperature bands and oscillating temperature curves appeared in the deposit and substrate. Originality/value The FTT technique was introduced into the numerical simulation of an additive manufacturing process. The efficiency of the process was improved, and the FTT technique was convenient for the 3D simulations and multi-pass deposits.

Numerical Simulation of the Temperature Field of Silumin Irradiated by a High-Intensity Electron Beam

2015 ◽  
Vol 58 (4) ◽  
pp. 478-484 ◽  
Author(s):  
Yu. F. Ivanov ◽  
E. A. Petrikova ◽  
O. V. Ivanova ◽  
I. A. Ikonnikova ◽  
A. V. Tkachenko
Keyword(s):  
Numerical Simulation ◽  
Temperature Field ◽  
Electron Beam ◽  
High Intensity

scholarly journals Numerical simulation and experimental investigation of the damage behavior on electron beam welded joints

2011 ◽  
Vol 10 ◽  
pp. 875-880 ◽  
Author(s):  
H.Y. Tu ◽  
S. Schmauder ◽  
U. Weber ◽  
Y. Rudnik ◽  
V. Ploshikhin
Keyword(s):  
Numerical Simulation ◽  
Experimental Investigation ◽  
Electron Beam ◽  
Welded Joints ◽  
Damage Behavior
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