Abstract
The experiment for measurement of welding distortion generated by fillet welding was carried out and the experiment was simulated by 3D program (three-dimensional thermal elastic-plastic analysis by FEM) developed by the author. The tendency of the longitudinal bending distortion was well simulated but the absolute value of the analysis results was larger than that of the experiment. Although the tendency coincided well in the angle distortion like as in the longitudinal bending distortion, the absolute value of the analysis results was smaller than that of the experiment. It is difficult to say that the experiment was accurately simulated by 3D program. It can be considered as the reason that the initial distortion of the skin plate had been ignored and that the welds metal had been assumed as a simple isosceles triangle. It is the future problem to be solved.
