Numberical simulation of welding deformation under different conditions

Finite element software ANSYS was employed to simulate the welding and heat treatment process of the Q345 plate with V-groove. A reasonable three-dimensional solid model was set up, element birth and death technology was used to simulate the formation of the weld. In the welding and cooling process, constraint was applied on both sides of the base metal. When the specimen was cooled to room temperature, constraint was removed. The deformation before and after removing constraint were compared. The results show that the removal of constraint makes the deformation increase. Then heat treatment was conducted on the plate of which the constraint was removed. The deformation results show that heat treatment reduces the angular distortion caused by removing constraint.