A 3D transient analytical solution to the temperature field during dissimilar welding processes

2014 ◽  
Vol 79 ◽  
pp. 66-74 ◽  
Author(s):  
Solaleh Salimi ◽  
Pouya Bahemmat ◽  
Mohammad Haghpanahi
Keyword(s):  
Temperature Field ◽  
Analytical Solution ◽  
Dissimilar Welding ◽  
Welding Processes

An analytical solution of a two-dimensional temperature field in a hollow cylinder under a time periodic boundary condition using Fourier series

2009 ◽  
Vol 223 (8) ◽  
pp. 1889-1901 ◽  
Author(s):  
G Atefi ◽  
M A Abdous ◽  
A Ganjehkaviri ◽  
N Moalemi
Keyword(s):  
Boundary Condition ◽  
Temperature Field ◽  
Fourier Series ◽  
Temperature Distribution ◽  
Analytical Solution ◽  
Hollow Cylinder ◽  
Periodic Boundary Condition ◽  
Periodic Boundary ◽  
Separation Of Variables ◽  
Two Dimensional

The objective of this article is to derive an analytical solution for a two-dimensional temperature field in a hollow cylinder, which is subjected to a periodic boundary condition at the outer surface, while the inner surface is insulated. The material is assumed to be homogeneous and isotropic with time-independent thermal properties. Because of the time-dependent term in the boundary condition, Duhamel's theorem is used to solve the problem for a periodic boundary condition. The periodic boundary condition is decomposed using the Fourier series. This condition is simulated with harmonic oscillation; however, there are some differences with the real situation. To solve this problem, first of all the boundary condition is assumed to be steady. By applying the method of separation of variables, the temperature distribution in a hollow cylinder can be obtained. Then, the boundary condition is assumed to be transient. In both these cases, the solutions are separately calculated. By using Duhamel's theorem, the temperature distribution field in a hollow cylinder is obtained. The final result is plotted with respect to the Biot and Fourier numbers. There is good agreement between the results of the proposed method and those reported by others for this geometry under a simple harmonic boundary condition.

scholarly journals Application of Analytical Solution to Steady-State Temperature Field by Double-Row-Pipe Freezing and Verification with Field Measurement: A Case Study of Connected Aisle

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Zequn Hong ◽  
Xiangdong Hu
Keyword(s):  
Temperature Field ◽  
Steady State ◽  
Analytical Solution ◽  
Wall Thickness ◽  
Field Measurement ◽  
Field Analysis ◽  
Shield Tunnel ◽  
Double Row ◽  
Steady State Temperature ◽  
Frozen Wall

In order to solve the problem of sealing water and bearing capacity of a connected aisle in an underwater shield tunnel, a double-circle horizontal freezing method was adopted for ground reinforcement in the connected aisle of Maliuzhou Tunnel, which is China’s first shield tunnel with superlarge diameter built in a composite stratum. This paper proposed a new double-row-pipe freezing model for the calculation of frozen wall thickness based on analytical solution to steady-state temperature field. Besides, field measurement and transient numerical studies of the active freezing period were also carried out to study the freeze-sealing effect. The results show that frozen wall thickness obtained by analytical solutions agrees well with numerical simulation results, which verifies the applicability of the newly proposed calculation method. Field analysis indicates that soil temperature gradually approaches a stable value which is far below the freezing point, and a reliable water-sealing curtain can be formed around the designed connected aisle. Maximum impact of soil excavation on the frozen wall is about 10°C, and reducing exposure time of excavation surface can effectively alleviate the weakening of frozen wall. To obtain comprehensive analysis for freezing wall thickness, a more reasonable arrangement of temperature-measuring holes is expected in future freezing engineering.

scholarly journals Thermographic Monitoring of Laser Cutting Machine

Proceedings ◽  
2019 ◽  
Vol 27 (1) ◽  
pp. 28
Author(s):  
Paolo Bison ◽  
Giovanni Ferrarini ◽  
Gabriele Zanon
Keyword(s):  
Temperature Field ◽  
Analytical Solution ◽  
Laser Cutting ◽  
Energy Demand ◽  
Steel Plate ◽  
Cutting Tools ◽  
Plate Surface ◽  
Ir Camera ◽  
Cutting Machine ◽  
Contact Processing

Computer Numerical Controlled (CNC) laser cutting tools are developing as an alternative to conventional cutting systems thanks to increased accuracy, non-contact processing, higher productivity, less energy demand. An IR camera is utilized to monitor the laser cutting process of a steel plate. Even though the process is very complicated an analytical solution of the temperature field generated on a slab by a point source moving along one direction of the plate surface is provided in order to interpret the temperature field experimentally obtained by the IR camera.

Analytical Solution for Transient Temperature Field Around a Cased and Cemented Wellbore

2005 ◽  
Author(s):  
Vanessa Pereira Separ King ◽  
Lucia Carvalho Coelho ◽  
Jaci Guigon ◽  
Gerson Cunha ◽  
Luiz Landau
Keyword(s):  
Temperature Field ◽  
Analytical Solution ◽  
Transient Temperature ◽  
Transient Temperature Field

Analysis of Dissimilar Metal Welding of EN19 and SS304L

2018 ◽  
Vol 10 (4) ◽  
Author(s):  
G.T. Gopalakrishna ◽  
B.S. Ajay Kumar ◽  
K.R. Vishnu ◽  
S.D. Sundareshan
Keyword(s):  
Tensile Strength ◽  
Low Carbon Steel ◽  
Base Material ◽  
Pressure Vessels ◽  
Inert Gas ◽  
Weld Strength ◽  
Dissimilar Welding ◽  
Low Carbon ◽  
Mig Welding ◽  
Welding Processes

Dissimilar welding between low carbon steel and austenitic stainless steel using both Tungsten inert gas and metal inert gas welding has been reported. However, the combination of SS304 and mild steel has less tensile strength in both TIG and MIG welding. Therefore, this study is undertaken with the objective of finding the weld strength of EN19 and SS304L using TIG and MIG welding with different parameters. Tensile strength and hardness of the welded region is found to be higher than that of the base material. The comparison of microstructure near the weld pool and the base material revealed the changes in composition of materials besides the formation of marten site in the welded region. The main application of this material thus prepared by welding processes could be in automobile industries, food industries and nuclear pressure vessels.

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