We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Modelling of Laser Beam Distribution Effects for Metal Laser Cutting.
- Authors
AMARA, E. H.; KHELOUFI, K.; TAMSAOUT, T.; AGGOUNE, S.
- Abstract
We develop a study on laser cutting of metals with assist gas jet, the aim is to investigate the effect of the beam shape spatial distribution when a top-hat or a Gaussian beam distributions are considered. A three-dimensional (3-D) numerical model is developed for assumed normal atmospheric conditions, where the treated metallic sample is subjected to irradiation with a continuous wave (CW) Nd:YAG laser beam. The finite volume method (FVM) is used to discretize the differential governing conservation equations, which are numerically solved. The solid-air and liquid-air interfaces are tracked by implementation of the volume of fluid (VOF) method, whereas an enthalpy approach allows to take into account the melting and re-solidification phenomena. The cut formation is simulated by inserting the related laser deposited energy, for the considered beam distribution, as a volumetric source term in the energy conservation equation, the results show that the used beam distribution may play an important role in reducing the striation formation.
- Subjects
LASER beam cutting; SPATIAL distribution (Quantum optics); FINITE volume method; SOLIDIFICATION; ELECTRIC discharges
- Publication
Lasers in Engineering (Old City Publishing), 2016, Vol 35, Issue 1-4, p187
- ISSN
0898-1507
- Publication type
Article