Numerical Modeling Of Surface Treatment By
Laser Beam
Author(s)
R. Gospavic & V. Popov
Abstract
In this work an analytical approach for analysis of surface treatment by a laser
beam is presented. A thermal model of interaction for the case of cylindrical
geometry of the material and asymmetric distribution of the laser beam intensity
are used. An analytical procedure is developed to analyze the temporal and the
spatial distribution of the temperature field inside the bulk of material. This kind
of consideration is of practical interest in cases where the excitation by the laser
beam is not symmetric in respect to its position or shape, e.g. multi-mode
working regimes or asymmetrical distribution of the laser beam intensity. The
heating effects were considered in the temperature range up to the melting point.
The thermal and the optical parameters of the material were assumed to be
independent of the temperature and were given constant values in the
temperature range of interest. This approach makes use of the Laplace transform,
in order to eliminate dependence on time. The Fourier method of variable
separation was used to obtain the temperature field distribution in the Laplace
transform domain.
Keywords: surface treatment, laser, thermal model, multi-mode.
1 Introduction
In a general case the analysis of the laser-material interaction, important for
practical applications, is very complex and includes analysis of different physical
processes such as material removal, material melting, thermal stresses, shock
wave, etc. This prevents successful construction of a general analytical solution
and different numerical procedures have been used in the past [1]. This work is
restricted only to analysis of heating effects of the laser-material interaction.
Keywords
surface treatment, laser, thermal model, multi-mode.
Related Book
Other papers in this volume
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