Numerical Simulation Analysis On Residual Stress Pipeline Girth Welding Joint Strength in Operation Conditions PDF

Keywords

Girth seam; Finite element; Residual stress; Strength; temperature.

Abstract

After the completion of pipeline girth welding joint, the joint may be strengthened or softened and high residual stress exists. Most of weld indexes are acceptable, but when pipeline works under inner pressure conditions and the weld joint is in the high-accident risk zone. This paper establishes indirect coupling of pipe 3D pipe multilayer V girth weld based on a weld temperature field and stress field of finite element analysis program. The temperature field simulation results are compared with the experimental and simulation results from some references and those Comparison results are analyzed. The results of residual stress strength joint simulation in operation conditions (0MPa, 5MPa, 10MPa, 15MPa inner pressure) are analyzed and their law of variation is summarized.