ABSTRACT
Finite Element welding simulation is a useful method in which temperature distribution, distortion and residual stresses can be predicted. A three-dimensional model with moving heat source has represented the most accurate results with the capacity of monitoring effects of different parameters like welding speed. This paper evaluates how making a specific throat of a fillet welded joint by one or two passes distorts the joint. Thus, an FE model using a moving heat source has been employed. One pass and two passes were simulated to somehow that in the two passes model, each weld line produced half of the weld area. Since other parameters including voltage and current welding have been assumed to be constant, weld speed in the two passes simulation became double that of the one pass model. Interesting results showed that this two pass welding leads to more unfavorable results.
