from the conferences organized by TANGER Ltd.
This work concerns numerical modelling of laser butt-welding of T-joints, made of S355 steel. Numerical analysis of thermomechanical phenomena is performed in ABAQUS FEA engineering software. Additional, author’s subroutines are implemented in designed three dimensional model using Fortran programming language. Developed subroutines describe the distribution of volumetric laser beam heat source power, the kinetics of phase transformations in solid state as well as isotropic strain generated by the temperature field and structural strain during heating and cooling of welded steel. Performed computational analysis takes into account thermomechanical properties changing with temperature. Butt-welded T-joints are performed on Yb:YAG laser in order to verify the results of numerical simulations. Characteristic zones of the cross section of the joint are compared to numerically predicted geometry of fusion zone and heat affected zone. Numerically predicted displacement in chosen sections of the joint is compared to real displacement, measured using profilographometer New Form Talysurf 2D/3D 120.
Keywords: Laser welding, T-joint, numerical modeling, phase transformations, welding deformations© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.