Open AccessPractical Research on Welding Simulation of Q345 Steel
Author(s) -
Zhiling Wang
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/637/1/012012
Subject(s) - welding , materials science , butt welding , heat affected zone , residual stress , deformation (meteorology) , shrinkage , finite element method , butt joint , stress (linguistics) , electric resistance welding , composite material , tension (geology) , metallurgy , ultimate tensile strength , structural engineering , engineering , linguistics , philosophy
In this paper, we use TCL/TK integrated language analysis software and semi-ellipsoid heat source model and life-death element method to simulate the butt welding process of Q345 steel plate with thickness of 10 mm. We simulated and analyzed the temperature field, stress field and welding deformation of multi-layer welding. Through welding simulation analysis, we extracted the distribution of welding residual stress and welding deformation of butt joint, and obtained the transverse and longitudinal shrinkage of butt plate and the main reasons. The results show that the multi-layer butt welding seam and its adjacent area are under tension, and the numerical value generally reaches the yield strength, and the two sides are under compression. The tensile stress in the middle of the weld bead is the largest and decreases gradually toward both ends. The cross-sectional area of single-sided multi-layer welding seam is larger and asymmetric along the thickness of the plate. After welding, the transverse shrinkage and angular deformation of the welded parts are larger. At the same time, the accuracy of the simulation results is verified by actual welding and testing.