| The loading of welding heat resource model on the curved structure's friction stir welding process is realized by means of the method of node-to-node connection. As an example, the temperature field of the stringer and skin structure's overlap joint during friction stir welding process is researched while the structure material is 7A04 Al alloy. The results of numerical simulation show that the resting time of rotational tool at the insertion position after the inserting process of the tool is finished greatly influences the welding temperature field. With the decrease of welding velocity, the increase of rotational speed and the increase of rotational tool's press, the peak value of temperature in the welding process increases and the high temperature region in weld enlarges. According to the best range of temperature peak value and the less high temperature region, the optimization scheme of welding parameters of friction stir welding is put forward. |
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