Thermomechanical Analysis of the Welding Process Using the Finite Element Method

1975 ◽  
Vol 97 (3) ◽  
pp. 206-213 ◽  
Author(s):  
E. Friedman
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Welding Process ◽  
Thermomechanical Analysis ◽  
Analytical Models ◽  
The Finite Element Method ◽  
Nonuniform Temperature ◽  
Butt Weld ◽  
Transverse Bending ◽  
Finite Element Formulations

Analytical models are developed for calculating temperatures, stresses and distortions resulting from the welding process. The models are implemented in finite element formulations and applied to a longitudinal butt weld. Nonuniform temperature transients are shown to result in the characteristic transverse bending distortions. Residual stresses are greatest in the weld metal and heat-affected zones, while the accumulated plastic strain is maximum at the interface of these two zones on the underside of the weldment.

An Influence of Frictional Model on Temperature Distribution during a Friction Spot Stir Welding Process of Titanium Grade 2

2016 ◽  
Vol 687 ◽  
pp. 155-162
Author(s):  
Piotr Lacki ◽  
Zygmunt Kucharczyk ◽  
Tomasz Walasek
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Friction Stir Welding ◽  
Temperature Distribution ◽  
Welding Process ◽  
Relative Speed ◽  
The Finite Element Method ◽  
Friction Stir ◽  
Temperature Distributions ◽  
Titanium Grade

In the paper, the influence of friction on temperature distribution in the friction spot stir welding process of titanium grade 2 is analysed. It is assumed that the friction coefficient may be a function of temperature or the relative speed of the contact areas. The finite element method is used in the numerical calculations. Temperature distributions and temperature versus time for the analysed friction coefficients are presented. The results also show that applying a proper frictional model is very essential for the sake of heat generation during friction stir welding.

The Simulation and Analysis of the New Type Large Vacuum Container Flange Welding Process

2014 ◽  
Vol 472 ◽  
pp. 671-676
Author(s):  
Bo Tao Liu ◽  
Yan Qi ◽  
Xiao Han ◽  
Shi Zeng Lv ◽  
Guo Feng Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Structural Strength ◽  
Hollow Structure ◽  
Welding Process ◽  
The Finite Element Method ◽  
Material Consumption ◽  
Stiffness Property ◽  
New Type ◽  
The Stability

Flange is the key part of the large vacuum container and its stiffness property affects the sealing effect and the stability of the container. Large flange welding process will have a greater impact on its structural strength. In view of the traditional way of forming large vacuum container flange has problems that processing and manufacturing are difficult, more material consumption, and poor stiffness, a new type of flange structure was support. The new design has hollow structure and the welding process of cover flange was simulated through the finite element method. After that, the stress and the deformation were analyzed and then the proper welding scheme was optimized.

Thermomechanical analysis of the drum of a steam generator using the finite element method

2012 ◽  
Vol 227 (3) ◽  
pp. 157-165
Author(s):  
Juan Carlos Prince Avelino ◽  
Guillermo Efren Ovando Chacon ◽  
Alberto Servín Martinez ◽  
Gilberto Ochoa Lamadrid ◽  
Rodolfo Muñoz Quezada
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Steam Generator ◽  
Thermomechanical Analysis ◽  
The Finite Element Method ◽  
Element Method

Passivated Interconnect Lines: Thermomechanical Analysis and Curvature Measurements

1999 ◽  
Vol 594 ◽  
Author(s):  
A. Wikström ◽  
P. Gudmundson ◽  
S. Suresh
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Material Properties ◽  
Thermomechanical Analysis ◽  
The Finite Element Method ◽  
Curvature Measurements ◽  
Interconnect Lines ◽  
Element Method

AbstractIt is well known that curvature measurements may be used to obtain volume averaged stresses in thin continuous films and unpassivated lines without knowledge of the material properties of the film or lines. However, recently a method was presented which makes it possible to use curvature measurements also for the determination of volume averaged stresses in passivated lines. Since the problem is statically indeterminate the method requires knowledge of the material properties of the lines and passivation. The sensitivity of the method to uncertainties in material properties and curvature data is here investigated by utilizing the finite element method for anisotropic Cu or Al lines embedded in SiO2 passivation. Furthermore, the method is extended to cover the case of different stress-free temperatures for the lines and passivation respectively.

Prediction of Residual Stresses in Butt Welded Plates Using Inherent Strains

1993 ◽  
Vol 115 (4) ◽  
pp. 417-423 ◽  
Author(s):  
Y. Ueda ◽  
M. G. Yuan
Keyword(s):  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Residual Stresses ◽  
The Finite Element Method ◽  
Butt Weld ◽  
Butt Welds ◽  
Plastic Analysis ◽  
Inherent Strain ◽  
Element Method

The source of residual stresses in the vicinity of a weld may be expressed in terms of inherent strains. The characteristics of the inherent strain distributions in butt welds are investigated. It is found that the patterns vary little with changes in the welding conditions and sizes of the welded plates. With some assumptions, simple formulas are derived for the distribution and magnitude of inherent strain in a butt weld. A method of predicting the residual stress in a butt-welded plate using the characteristics of inherent strain distributions is presented. The validity of the method is confirmed by thermal elasto-plastic analysis using the finite element method (FEM).

Confined masonry walls subjected to combined axial loads and out-of-plane uniform pressures

2012 ◽  
Vol 39 (4) ◽  
pp. 439-447 ◽  
Author(s):  
Jorge Varela-Rivera ◽  
Manuel Polanco-May ◽  
Luis Fernandez-Baqueiro ◽  
Eric I. Moreno
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Axial Load ◽  
Analytical Models ◽  
Maximum Pressure ◽  
Masonry Walls ◽  
The Finite Element Method ◽  
Axial Loads ◽  
Confined Masonry ◽  
Out Of Plane

This paper presents the results of a study on the behavior of three full-scale confined masonry walls subjected to combined axial loads and out-of-plane uniform pressures. The variable studied was the wall axial load. Analytical models were developed to predict out-of-plane cracking and maximum pressures. The former was predicted using the finite element method and the latter using the spring-strut method. This last method was modified to include the effect of the wall axial load. Experimental cracking and maximum pressures were compared with those obtained from analytical models. Based on the experimental results, it was concluded that as the axial load increases, the out-of-plane maximum pressure also increases. However, this latter value is limited by crushing of the masonry. By comparing experimental and analytical results, it was concluded that the out-of-plane cracking and maximum pressures are in general well predicted by the analytical models developed in this work.

Modeling of Welding Process and Allied Technologies

2018 ◽  
Vol 769 ◽  
pp. 323-328
Author(s):  
Natalia Astafeva
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Welding Process ◽  
Simulation Method ◽  
The Finite Element Method ◽  
Program Complex ◽  
Weld Joints ◽  
Welding Technology ◽  
Alloy Weld ◽  
Element Method

The paper deals with the simulation technique of Al-Mg-Si alloy weld joints. Complexity of welding is due to the fact that a massive piece is jointed to stamped blanks-package. The main phases of the welding process modeling in a program complex based on the finite element method are considered. The efficiency of use of the computer simulation method for developing the welding technology and determining the method of fixing the parts is shown. Keywords: TIG welding, welding simulations, heat transfer, Sysweld program, the finite element method (FEM).

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