Determination of Temperature Field and Residual Stress in Welding of Low Carbon Steel T-Joint

This paper presents the welding residual stress in T-joint fillet welds of low carbon steel by finite element analysis. Goldak’s double ellipsoidal heat source model is used in the numerical model by the finite element method. The material of S355J2G3 non-alloy structural steel is used. The thickness of steel plate in T-joint is 10 mm. A single pass weld is realized simultaneously in two sides of T-joint. The results of temperature distribution, residual stresses and welding deformations of double T-joint fillet weld performed by the MAG welding process are presented and discussed. The ESI SYSWELD finite element software that is the specialized software for welding and heat treatment processes was used for the purpose of this paper. Obtained results show that: in the flange plate, longitudinal stress (σx) and transverse stress (σy) components are significant; in the web plate, longitudinal stress (σx) component is significant; other stress components (σz, τxy, τyz, τzx) are insignificant.