Abstract

The modeling and simulation of the welding process has been of main concern for different fields of applications. It is used mainly to check for the residual stresses generated due to welding. These stresses may reach a value near the yielding level and may cause several failure types in the welded strnctures. Several attempts have been clone in analyzing the welding process using different approaches. Analytical methods have been developed with many approximations and assumptions to handle the highly non-linear behavior of the problem. On the other hand, experimental methods in monitoring the residual stresses in a welded structure may require destructive procedure to install several gages at several critical points which might not be possible for some cases. The numerical simulation using finite elements of the welding process was an important solution to account for the different parameters of the welding process. 2D forms of approximation were developed in analyzing most of the models of such problem. 3D models analyzing the welding process were developed in limited applications due to its high computation time and cost. With the evolution of new finite element tools and fast computer systems, full 3D analysis of the welding process is becoming in hand. In the present work, models of the welding process with and without metal deposition of filler material are developed. The simulation includes the moving heat source, temperature dependant material properties, phase and state change, and coupled displacement-temperature analysis. Initially, a model is developed simulating the welding process in a previous research that does not include filler material addition to validate the model of the moving heat source, the temperature dependant material properties, an

School

School of Sciences and Engineering

Date of Award

6-1-2002

Online Submission Date

1-1-2002

First Advisor

Maher Y.A. Younan

Second Advisor

Abdallah S.Wifi

Committee Member 1

Hesham Sobhi Sayed

Committee Member 2

Medhat A. Haroun

Committee Member 3

Ezzat H. Fahmy

Document Type

Thesis

Extent

109 leaves :

Library of Congress Subject Heading 1

Welding

Rights

The author retains all rights with regard to copyright. The author certifies that written permission from the owner(s) of third-party copyrighted matter included in the thesis, dissertation, paper, or record of study has been obtained. The author further certifies that IRB approval has been obtained for this thesis, or that IRB approval is not necessary for this thesis. Insofar as this thesis, dissertation, paper, or record of study is an educational record as defined in the Family Educational Rights and Privacy Act (FERPA) (20 USC 1232g), the author has granted consent to disclosure of it to anyone who requests a copy.

Call Number

Thesis 2002/12

Location

mgfth

Download

Included in

Engineering Commons

Share

COinS