Three-Dimensional Finite Element Analysis of Melting in an Alloy Irradiated With a High Energy Laser Beam

Computers and Information in Engineering ◽

10.1115/imece2003-43688 ◽

2003 ◽

Author(s):

Bhavani Kasula ◽

Pradip Majumdar

Keyword(s):

Mathematical Model ◽

Material Processing ◽

Finite Element ◽

Laser Beam ◽

Molten Pool ◽

Three Dimensional ◽

High Energy ◽

Convective Boundary ◽

Energy Laser ◽

High Energy Laser

Lasers are being widely used in the material processing industry lately. In this work, study is performed on the resluting temperature and stress distribution, the width and depth of the melt pool in the heat-affected zone during material processing with a high energy Gussian laser beam. A three-dimensional enthalphy-based mathematical model is developed to study the effect of high energy laser beam on the formation of molten pool. The mathematical model is based on a three-dimensional transient heat equation taking into consideration the power intensity of the Gussian laser beam and phase diagram of the material. A computational algorithm is implemented to evaluate the temperature distributions as well as shape and size of molten pool. The numerical solution with the applied heat flux and convective boundary conditions is obtained usign a 3-D finite element code.

Download Full-text

Simulation of Welding of Aluminum Parts Using High Energy Laser Beam

Volume 7: Fluid Flow, Heat Transfer and Thermal Systems, Parts A and B ◽

10.1115/imece2010-39787 ◽

2010 ◽

Author(s):

Tien-Chien Jen ◽

Alexandre Reikher

Keyword(s):

Laser Beam ◽

Moving Boundary ◽

Laser Beam Welding ◽

Three Dimensional ◽

Welding Process ◽

High Energy ◽

Energy Laser ◽

High Energy Laser ◽

Direct Tracking ◽

Solid Liquid Interface

A three dimensional finite difference model of the high energy laser beam welding process has been developed to predict temperature distribution. The calculations were performed using fixed grid enthalpy method, which does not require direct tracking of the solid–liquid interface and thus eliminates explicit reference to a moving boundary. As a result it allows utilizing standard solution method for the energy equation without any additional manipulations and transformations. Heat losses due to convection and radiation form the top surface of the workpiece, as well as effects of the natural convection in the liquid zone during welding operation has been accounted for in this study. Simulation results are in good agreement with published experimental measurements as well as with results obtained using commercial software Flow3D®.

Download Full-text