Finite Element Simulation and Experimental Validation of Welding Distortion of Fillet Welded T-joints

Abstract

Computational modeling of distortion can minimize costly distortion corrections, and improve quality.  The accuracy of this approach is highly dependent on the modeling of the heat source.  The angular distortion found to be affected by welding speed, current, material thickness, penetration depth and pre-welding gap between plates. However, although it is said that there is a relationship between all inputs, there is no method to formulate how much they cause distortion.  Quantifying the weld distortion is a challenging procedure. An adequate way to validate this type of study is to use precision measurement tools such as optical 3D scanner and coordinate measuring machine (CMM).