It was conducted on Wednesday, 18/9/2024, in the Graduate Studies Hall of the Department of Petroleum Engineering. The discussion of the master’s thesis of the student Saja Adnan Hussein, which is tagged:
” Laser Transmission Welding (LTW) Process: Experimental Investigation, Modeling and Optimization”.
The discussion committee consisted of names listed below:
1- Prof. Dr. Qassim Mohammed Doos (Chairman)
2- Asst. Prof. Dr. Hussam Lefta Alwan (Member)
3- Asst. Prof. Dr. Sanaa Numan Mohammed (Member)
4- Asst. Prof. Dr. Bassim Shaheen Bachy (Supervisor)
In this study experimental investigation and mathematical modeling have been carried out on LTW of Polymethylmethacrylate (PMMA) with dimensions of 80mm x 40mm x 2mm.
This study used two types of laser welding profiles based on laser path and line movement to verify welding quality and accuracy. The traditional box type and new strategy the spiral type was used to examine the influence of the welding lines on weld strength and accuracy.
Accordingly, the thesis included recommendations including:
- The spiral profile has a greater joint strength than the box profile.
- The LTWs products FOR spiral profile that minimum defect percentages and the highest load can be obtained by setting the laser power at high level and speed at low level.
- For the Box profile, the LTWs products with minimum defect percentages and the highest load can be obtained by setting the laser power at high level and speed at low level, at a single welding pass, or a high of both at multi passes.
- Use Minitab software’s response optimizer to optimize the box and spiral profile.
After the scientific discussion by the members of the discussion committee, the researcher received a rating of (Excellent).
