Simulation of temperature field and stress field of v-groove butt joint

Abstract

The APDL language of ANSYS software is used to write program to realize the moving load of weld heat source. The thermal-elastic-plastic finite element method for multi-layer and multi-pass welding process was used to simulate the temperature and stress fields of the V-groove Q235 steel plate butt joint with a thickness of 12 mm. It is concluded that in the welding process, the maximum temperature field does not appear at the center of the heat source, but around the heat source. The farther the free end is from the weld zone after welding, the larger the deformation is. After welding, the overall stress on the upper surface of the weld is larger than that on the middle and lower surface of the weld. Post-weld stress mainly concentrates at the bottom of the weld, i.e. the bottom of the V-shaped opening, and tends to increase from small to large in the direction of thickness.