Numerical Simulation of Temperature Distribution and Seam Forming in Narrow Gap Welding

1995 ◽  
pp. 198-207
Author(s):  
D. Weiß ◽  
G. Lube
Keyword(s):  
Numerical Simulation ◽  
Temperature Distribution ◽  
Narrow Gap ◽  
Narrow Gap Welding

Application of Numerical Simulation Considering the Effect of Phase Transformation to the Estimation of Hardness Distribution in Welds

2006 ◽  
Vol 512 ◽  
pp. 379-382 ◽  
Author(s):  
Yoshiki Mikami ◽  
Masahito Mochizuki ◽  
Terumi Nakamura ◽  
Kazuo Hiraoka ◽  
Masao Toyoda
Keyword(s):  
Numerical Simulation ◽  
Phase Transformation ◽  
Thermal Cycle ◽  
Welding Process ◽  
Hardness Distribution ◽  
Narrow Gap ◽  
Thermal Cycles ◽  
Narrow Gap Welding ◽  
Ultrafine Grained ◽  
Good Agreement

This study investigated a method for estimating hardness distribution in welds, considering the effect of phase transformation and weld thermal cycles. Hardness distribution in welds was estimated from fractions and hardness of each microstructure by using rule of mixture. Finite element heat conduction analysis was performed to calculate weld thermal cycles. Microstructures formed corresponding to the thermal cycle were also calculated based on the continuous cooling transformation (CCT) diagram. The method mentioned above was applied to welds of Ultra-Narrow Gap welding process, which was developed for welding of ultrafine-grained steels. The calculated thermal cycles in the welds corresponded with measured results. Moreover, the estimated hardness distribution in the welds, which were estimated by using calculated thermal cycles and the phase fraction of each microstructure, was also in good agreement with measured values.

Modeling of weld formation in variable groove narrow gap welding by rotating GMAW

2020 ◽  
Vol 57 ◽  
pp. 163-173
Author(s):  
Wenhang Li ◽  
Chengfu He ◽  
Jinshan Chang ◽  
Jiayou Wang ◽  
Jing Wu
Keyword(s):  
Narrow Gap ◽  
Narrow Gap Welding ◽  
Weld Formation

Experimental and Numerical Evaluation of Small-Scale Cryosurgery Using Ultrafine Cryoprobe

2013 ◽  
Vol 4 (4) ◽  
Author(s):  
Junnosuke Okajima ◽  
Atsuki Komiya ◽  
Shigenao Maruyama
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Heat Transfer Coefficient ◽  
Temperature Distribution ◽  
Surface Temperature ◽  
Numerical Evaluation ◽  
Small Scale ◽  
Outer Diameter ◽  
Cooling Performance ◽  
The Heat Transfer Coefficient

The objective of this work is to experimentally and numerically evaluate small-scale cryosurgery using an ultrafine cryoprobe. The outer diameter (OD) of the cryoprobe was 550 μm. The cooling performance of the cryoprobe was tested with a freezing experiment using hydrogel at 37 °C. As a result of 1 min of cooling, the surface temperature of the cryoprobe reached −35 °C and the radius of the frozen region was 2 mm. To evaluate the temperature distribution, a numerical simulation was conducted. The temperature distribution in the frozen region and the heat transfer coefficient was discussed.

scholarly journals MATHEMATICAL MODELLING AND COMPUTER SIMULATION OF TEMPERATURE DISTRIBUTION IN INHOMOGENEOUS COMPOSITE SYSTEMS WITH IMPERFECT INTERFACE

2014 ◽  
Vol 6 (2) ◽  
pp. 77-85
Author(s):  
Pratibha Joshi ◽  
Manoj Kumar
Keyword(s):  
Numerical Simulation ◽  
Heat Flux ◽  
Temperature Distribution ◽  
Imperfect Interface ◽  
Immersed Interface Method ◽  
Immersed Interface ◽  
Composite Systems ◽  
Steady State Temperature ◽  
Perfect Interface ◽  
Inhomogeneous Composite

Many studies have been done previously on temperature distribution in inhomogeneous composite systems with perfect interface, having no discontinuities along it. In this paper we have determined steady state temperature distribution in two inhomogeneous composite systems with imperfect interface, having discontinuities in temperature and heat flux using decomposed immersed interface method and performed the numerical simulation on MATLAB.

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