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http://dx.doi.org/10.5781/KWJS.2013.31.5.15

Prediction of Welding Imperfection with Idealization of Welding and Their Accuracy  

Lee, Jae-Yik (Research Institute of industrial Science & Technology)
Chang, Kyong-Ho (Dept. of Civil, Environmental & Plant Eng., Chung-Ang Univ.)
Kim, You-Chul (JWRI of Osaka University)
Publication Information
Journal of Welding and Joining / v.31, no.5, 2013 , pp. 15-19 More about this Journal
Abstract
In order to reduce a grand compute time in prediction of welding distortion and residual stress by 3D thermal elastic plastic analysis, idealization of welding that is methods to heat input simultaneously in all weld metal on the same welding direction is carried out on two weld joints(butt welding and fillet welding). Then, the accuracy of acquired results is investigated through the comparison of the high accuracy prediction results. The thermal conduction analysis results by idealization of welding, the temperature is raised accompany with beginning of heat input because all of weld metal is heated input at the same time. On the other side, the temperature witch predicted with high accuracy is raised at the moment heating source passes the measuring points. So, there is difference of time between idealization of welding and considering of moving heat source faithfully. However, temperature history by idealization of welding is well simulated a high accuracy prediction results.
Keywords
Welding imperfection; Welding distortion; Residual stress; Idealization of welding; CPU time; 3D thermal elastic- plastic analysis;
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