Finite Element Simulation for Welding Deformation and Residual Stress in Pressure Wheel of Road Roller

On the basis of thermo elastic plastic theory and finite element analysis method, the finite element model of the press wheel was established and the welding deformation and residual stress distributions of the pressure wheel were simulated. The residual stresses of the pressure wheel were measured by a blind-hole method and compared with those by simulation. The results show that two sealing plates had a convex shape due to the welding deformation. The maximum deformation amount was 5.732 mm. The residual stresses at the welding arc and weld seam of the pressure wheel after welding were relatively large. The peak value of stresses was 416.40 MPa. With increasing distance from the free edge of circular plate, the residual stress at the straight weld center of the circular plate first increased then decreased and then increased. The measured residual stresses coincided well with those from the simulation, indicating the accuracy of the simulation.