Volume 8 Number 9 (Sep. 2013)
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JCP 2013 Vol.8(9): 2182-2189 ISSN: 1796-203X
doi: 10.4304/jcp.8.9.2182-2189

Arc Efficiency Assisted Finite Element Model for Predicting Residual Stress of TIG Welded Sheet

Kuang-Hung Tseng and Jie-Meng Huang
Institute of Materials Engineering, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan

Abstract—Predicting and controlling residual stresses are critical issues in welding engineering. With advancements in computer technology, a numerical simulation technique can predict welding residual stress. To accurately simulate temperature and stress fields, the thermal cycle obtained from the finite element model must be in coincidence with an actual heat source. This study performed a Gaussian distribution of the heat flux with an effective arc radius that was selected for the finite element analysis to accurately describe the distributive nature of the heat source provided by the welding arc. The results showed that arc efficiency has an effect on temperature history during welding. The computational results of the temperature history and residual stress showed very good agreement with the corresponding experimental data. This study proposes that the simulation errors in finite element analysis can be eliminated by adjusting the Gaussian distributed spatial heat source and arc efficiency.

Index Terms—TIG welding, arc efficiency, residual stress, finite element model

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Cite: Kuang-Hung Tseng and Jie-Meng Huang, " Arc Efficiency Assisted Finite Element Model for Predicting Residual Stress of TIG Welded Sheet," Journal of Computers vol. 8, no. 9, pp. 2182-2189, 2013.

General Information

ISSN: 1796-203X
Abbreviated Title: J.Comput.
Frequency: Bimonthly
Editor-in-Chief: Prof. Liansheng Tan
Executive Editor: Ms. Nina Lee
Abstracting/ Indexing: DBLP, EBSCO,  ProQuest, INSPEC, ULRICH's Periodicals Directory, WorldCat,etc
E-mail: jcp@iap.org
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