Welding simulation of circumferential weld joint using TIG welding process

Abstract

Circumferential weld joints are commonly used in marine engineering, nuclear power plant, aerospace industry. In this welding simulation of circumferential weld joint using Tungsten inert gas welding (TIG) process was done. In TIG welding joint the high temperature is induced due to which there is high distortion and residual stress. For that developing a good welding joint in controlled residual stress and deformation we are using the Welding simulation Finite element methodology. A SS304 material with TIG welding is selected as experimental and combination of Finite Element Analysis (FEM) using the MSC marc software to predict the temperature, residual stresses and distortion with varying cylindrical thickness, voltage, pressure and efficiency. Using finite element simulations, the welding heat input is varied by modifying welding parameters (such as welding current and welding speed) to study the effect on residual stresses. The aim of this research is to provide information to verify the validity of current process circumferential manufacturing technology for thin-walled pipes, in order to prevent the failure of these structures in operation due to these inherent stresses. The study's welding heat source model is the Double Ellipsoidal Heat Source Model, which is the best heat source model of welding simulation.