Numerical Dynamic Analysis of Moving GTA Weld Pool

[+] Author and Article Information
Z. N. Cao, Y. M. Zhang

Center for Robotics and Manufacturing Systems, University of Kentucky, Lexington, KY 40506

R. Kovacevic

Southern Methodist University, Dallas, TX

J. Manuf. Sci. Eng 120(1), 173-178 (Feb 01, 1998) (6 pages) doi:10.1115/1.2830096 History: Received September 01, 1995; Revised October 01, 1996; Online January 17, 2008


A three dimensional model with a moving heat source is developed to describe heat transfer and fluid flow in transient weld pools. Full penetration and free top and bottom surfaces are incorporated in the model in order to simulate the welding process more practically. The influence of plate thickness and welding current on the dynamics of weld pools is analyzed using calculated data. It is shown that when the workpiece is nearly penetrated, the depth of weld pool increases quickly. Also, the elevation of the top surface decreases quickly once the full penetration status is established.

Copyright © 1998 by The American Society of Mechanical Engineers
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