Physical Simulation Method for the Investigation of Weld Seam Formation During the Extrusion of Aluminum Alloys

JOM ◽  
2016 ◽  
Vol 69 (4) ◽  
pp. 734-741 ◽  
Author(s):  
Gang Fang ◽  
Duc-Thien Nguyen ◽  
Jie Zhou
Keyword(s):  
Aluminum Alloys ◽  
Weld Seam ◽  
Physical Simulation ◽  
Simulation Method

scholarly journals Research on the Deviation Sensing of V-groove Weld Seam based on a Novel Two Channel Acoustic Sensor

2021 ◽  
Author(s):  
Yanfeng Gao ◽  
Jianhua Xiao ◽  
Genliang Xiong ◽  
Hua Zhang
Keyword(s):  
Weld Seam ◽  
Welding Process ◽  
Simulation Method ◽  
Seam Tracking ◽  
Acoustic Sensor ◽  
Robotic Welding ◽  
Weld Seam Tracking ◽  
Novel Method ◽  
Linear Property ◽  
Sensing Performance

Abstract It is essential to sense the deviation of weld seam real-timely in robotic welding process. However, welding process always accompanied with high temperature, strong arc light and background noises, which significantly affects the application of sensors. In this study, a novel acoustic sensor was developed. This sensor consists of two microphones. Based on the sound signals collected by these two microphones, the deviation of weld seam was detected. The frequency response of the developed acoustic sensor was studied through simulation method firstly, and then the sensing performance of it was analyzed with experiments. The experimental results show that the developed acoustic sensor has a linear property for the deviation detection of V-groove weld seam. This research provides a novel method for weld seam tracking.

scholarly journals A Multicomponent Thermal Fluid Numerical Simulation Method considering Formation Damage

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Xinan Yu ◽  
Xiaoping Li ◽  
Shuoliang Wang ◽  
Yi Luo
Keyword(s):  
Numerical Simulation ◽  
Oil Recovery ◽  
Heavy Oil ◽  
Physical Simulation ◽  
Damage Model ◽  
Simulation Method ◽  
Formation Damage ◽  
Thermal Fluids ◽  
Before And After ◽  
Control Equation

Multicomponent thermal fluid huff and puff is an innovative heavy oil development technology for heavy oil reservoirs, which has been widely used in offshore oilfields in China and has proved to be a promising method for enhancing oil recovery. Components of multicomponent thermal fluids contain many components, including carbon dioxide, nitrogen, and steam. Under high temperature and high pressure conditions, the complex physical and chemical reactions between multicomponent thermal fluids and reservoir rocks occur, which damage the pore structure and permeability of core. In this paper, the authors set up a reservoir damage experimental device, tested the formation permeability before and after the injection of multiple-component thermal fluids, and obtained the formation damage model. The multicomponent thermal fluid formation damage model is embedded in the component control equation, the finite difference method is used to discretize the control equation, and a new multielement thermal fluid numerical simulator is established. The physical simulation experiment of multicomponent thermal fluid huff and puff is carried out by using the actual sand-packed model. By comparing the experimental results with the numerical simulation results, it is proved that the new numerical simulation model considering formation damage proposed in this paper is accurate and reliable.

Simulation and Prototyping of an Orbital Lightning Detector

2020 ◽  
pp. 4-17
Author(s):  
V.E. Kvitka
Keyword(s):  
High Speed ◽  
Physical Simulation ◽  
Simulation Method ◽  
Low Earth Orbit ◽  
High Speed Camera ◽  
Atmospheric Physics ◽  
Target Environment ◽  
Detector Simulation ◽  
Background Brightness ◽  
Exterior Design

The problem of detecting lightning flashes from space is becoming more and more important as the remote sensing of Earth, climatology and atmospheric physics develop. Orbital lightning detectors are designed both in Russia and abroad. The paper considers the problem of mathematical and physical simulation of a high-speed camera designed to observe lightning flashes from onboard spacecraft in low Earth orbit. Our previous works substantiated the exterior design of the lightning detector, computed its properties and described the algorithms behind the software. In order to validate the design results, we need to prototype the instrument. We describe the main problems of detecting lightning flashes as observed from space. We show a computer simulation method producing snapshots that takes into account the interference generated by the background and the photodetector. We studied the problems of recreating the target environment during prototyping of the lightning detector, accounting for the properties of the phenomenon observed, that is, the flash spot dimensions and the ratio of the background brightness to that of the lightning. We describe the principle of comparing these two types of snapshots (taken by the prototype and synthesised by the software) and compared the results of processing the images obtained. The results matched, which allowed us to validate the snapshot processing algorithm and confirmed that the lightning detector simulation method developed is correct

Experimental Study of Plastic Flow during Linear Friction Welding by Physical Simulation Method

2011 ◽  
Vol 314-316 ◽  
pp. 1009-1014
Author(s):  
Ying Jie Wang ◽  
Yong Zhang ◽  
Xu Chao Yuan ◽  
Guo Dong Wen ◽  
Tie Jun Ma ◽  
...  
Keyword(s):  
Experimental Study ◽  
Plastic Flow ◽  
Friction Welding ◽  
Oscillation Frequency ◽  
Physical Simulation ◽  
Simulation Method ◽  
Linear Friction Welding ◽  
Copper Particles ◽  
Compression Direction ◽  
Linear Friction

Abstract. In order to study the plastic flow during linear friction welding (LFW), copper particles were added as tracers on the surface of lead block. The flowing state of interior metal in LFW was simulated by the home-made simulator. Results show that the upset speed promotes the plastic flow of metal and the oscillation frequency restrains it. The upset speed influences the plastic flow of metal more significantly than the oscillation frequency. Only when the pressure reaches 800N and the increasing rate reaches 100N/s, can obvious plastic flow of lead happen in the direction perpendicular to the compression. But the plastic flow of lead in the compression direction is visible even if the pressure and its increasing rate are small.

2210 Integrated physical simulation method for decision making of complex physical product

2013 ◽  
Vol 2013.23 (0) ◽  
pp. _2210-1_-_2210-10_
Author(s):  
Hiroyuki FUJIWSRA ◽  
Yusuke ODO ◽  
Takao EGUCHI ◽  
Tsuyoshi KOGA ◽  
Kazuhiro AOYAMA
Keyword(s):  
Decision Making ◽  
Physical Simulation ◽  
Simulation Method ◽  
Physical Product

Physical Simulation of the Cutting Process Induced by Tool Geometric Angle and Cutting Parameters

2012 ◽  
Vol 430-432 ◽  
pp. 715-718 ◽  
Author(s):  
Xue Hui Wang ◽  
Ping Zhou ◽  
Ya Wen Liu ◽  
Ming Jun Dai
Keyword(s):  
Physical Simulation ◽  
Cutting Parameters ◽  
Simulation Method ◽  
Helix Angle ◽  
Rake Angle ◽  
Milling Process ◽  
Cutting Process ◽  
Depth Of Cut ◽  
Radial Depth ◽  
Solid Carbide

The tool geometric angle and cutting parameters have a significant influence on the titanium alloy milling process by the usage of solid carbide end mills.The physical simulation method was applied to predict the cutting force and temperature by using two comparative sets of simulation data such as the different tool gemetric angle as tool rake angle, helix angle and different cutting parameters such as spindle speed, axial depth of cut, radial depth of cut. Thus are the commonly used methods to simulate and predict the cutting process before the actual production, which can reduce product cost and time.

scholarly journals A physical simulation method for tsunami inundation flow with arbitrary flow velocity and inundation depth

2013 ◽  
Vol 69 (2) ◽  
pp. I_1471-I_1475
Author(s):  
Kazuyuki OTA ◽  
Naoto KIHARA ◽  
Takahiro SATO ◽  
Daisuke TAKABATAKE ◽  
Masafumi MATSUYAMA ◽  
...  
Keyword(s):  
Flow Velocity ◽  
Physical Simulation ◽  
Simulation Method ◽  
Tsunami Inundation ◽  
Inundation Depth ◽  
Arbitrary Flow

The Effect of Inclusions on the Formation of Intragranular Ferrite

2013 ◽  
Vol 765-767 ◽  
pp. 3134-3138
Author(s):  
Fan Zheng Bu ◽  
Xue Min Wang
Keyword(s):  
Chemical Composition ◽  
High Purity ◽  
Physical Simulation ◽  
Simulation Method ◽  
Oxide Powder ◽  
Q235 Steel ◽  
Intragranular Ferrite

In order to make a more intuitive and easier analysis the influence of different inclusions on the formation of ferrite, a layer of high purity oxide powder was added in the two parts of the Q235 steel artificially. The effect of the inclusions Ti2O3MgOZrO2 and Al2O3 on the nucleation of intragranular ferrite were studied by means of the physical simulation method. The microstructure of the micro-zone adjacent to the inclusions was observed and the elements of the micro-zone adjacent were analyzed. The results showed that the inclusions Ti2O3 and Al2O3 can form the ferrite layers at the oxides-steels interface; the inclusions Ti2O3 has an ability to induce the nucleation of intragranular ferrite; the inclusions Ti2O3 can change the chemical composition of the metal micro-zone adjacent to the inclusions, where the Mn depletion area was observed.

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