Simulation of the residual stress in a multi-pass oil and gas pipe weld joint

Abstract

In this paper, a welding simulation procedure is developed using the FE software MSC Marc to predict the residual stresses.Numerical simulation was used to predict the thermal, mechanical and residual stresses behaviour in dissimilar material welded pipes which were found to be in good concurrence with experiments. Both two-dimensional FE model (2D) and three-dimensional FE model (3D) models are used to simulate the residual stressesin different directions in several regions of the weld zone under the same welding conditions. The 2D modelwas used toreduce the time and cost of numerical simulation.The aimof the present work is to understand the evolution of residual stresses (axial, radial and hoop stresses) in weldments. The results of thesimulationreveal that the hoop and the axial residual stresses around the weld region arenoticeablyvarying from those in the steady range.

Prediction and numerical simulation of residual stress in multi-pass pipe welds

“…There are many methods to measure residual stresses are known as nondestructive, semi-destructive and destructive or diffraction as X-ray diffraction, hole drilling and block removal layering [2]. To reduce the residual stresses effect of welding process quality, research on residual stresses has been a continuous interest among researchers [3][4][5][6][7][8][9][10]. The experimental measurement techniques of residual stresses that involve the complex weld shape or structure, which is very time-consuming and costly.…”

“…Finite Element (FE) analysis (numerical simulation) is critical way to help quantify welding mechanism. Welding residual stresses in simulation research, which is based on the finite element analysis has achieved rapid development, and used in weld simulation has been widely used [10][11][12][13][14][15][16][17][18]. In this study, the prediction of residual stresses in a dissimilar pipe weld joint made of E355K2 and P460NH_1 is studied by using 2-D finite element method.…”