Since it is inconsistent and uncontrollable in the experiment, any variance in specimen dimensions, welding parameters and testing conditions will influence the consistency of testing results to some extent. In this paper, the Finite Element Method(FEM) is employed to solve this problem. A three-dimensional finite element model is established to simulate the deformation of I-steel during gas tungsten arc welding (TIG) with FEM software, which is set up to analysis the deformation of I-steel with different welding sequences.
