학술논문
Prediction of Surface Depression of a Tungsten Inert Gas Weld Pool in the Full-Penetration Condition
Document Type
Article
Source
Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture; June 1995, Vol. 209 Issue: 3 p221-226, 6p
Subject
Language
ISSN
09544054
Abstract
A three-dimensional model is set up to predict the surface depression of a tungsten inert gas (TIG) weld pool in a full-penetration condition in order to find out the relation between pool depression and weld penetration. It solves pool surface depression, fluid flow and heat transfer simultaneously and determines the configuration of a weld pool surface based on the dynamic balance among arc pressure, pool gravity and surface tension at the deformed weld pool surface. In the numerical simulation, difficulties associated with the irregular shape of the deformed weld pool surface and the liquid/solid interface have been overcome by adopting a boundary-fitted non-orthogonal curvilinear coordinate system. A series of data about pool surface depression under different TIG welding conditions are obtained. The validity of the model is verified through TIG welding experiments.