Numerical simulation for dynamic behavior of weld pool and fusion hole in TIG welding with gap

The dynamic behaviors of weld pool and fusion hole are mutually coupled in tungsten inert gas (TIG) welding with reserved gap. This simulation has important significance for revealing the effect of fusion hole on weld pool and in enriching the knowledge of TIG welding process with gap. A combined heat distribution model that is adaptive to the free surface deformation of weld pool was established in the article. The interface of the fusion hole...