Kim, Meung J.
M.S. (Master of Science)
Department of Mechanical Engineering
Engineering; Mechanical engineering; Design; Laser welding--Industrial applications; Micromachining; Keys and keyways (Machinery)
The purpose of this study is to simulate a finite element model of keyhole formation in micro laser welding and to find out the effects of several parameters including laser beam intensity on the final shape of keyhole formed after welding characterized by width, height of cut and HAZ. A 3D steady state and transient thermo-fluid models of micro laser welding are developed separately in finite element analysis software Ansys and formation of keyhole is monitored continuously. The model is developed considering two phases, liquid metal and solid metal. Boundary conditions are taken in general include convection and heat flux of laser beam. The work material considered is ANSI 304 stainless steel. Finally the simulated results are compared with the experimental values and the results are validated.
Vadde, Harish, "Analysis and simulation of keyhole formation in micro laser welding" (2015). Graduate Research Theses & Dissertations. 1436.
Northern Illinois University
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Advisors: kim j. meung.||Committee members: gau terng Jenn; pradip majumdar.