Thermal Field Simulation of Repair Threads in a Hole in the Cover of a Pressure Vessel by Welding Using Sysweld

This paper deals with the analysis of residual strain and stress after welding. It was done using the SYSWELD software, which is based on the finite element methods. The welding solution has been divided into two phases. In our simulation we have used the Goldak model for a heat source. After the correct allocation of all inputs the process can be initiated. The results of this phase of the solution are the distribution of the thermal fields and the percentages of the separate metallurgical phases. The results of these solutions are presented in this paper.