Simulation by temperature gradient adaption of wavelength effect in metal laser cutting
| Autor: | T. Aoudjit, F. Hamadi, A. Ahmanache, Toufik Tamsaout, Samia Aggoune, El-Hachemi Amara, Kada Bougherara, Karim Kheloufi |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science business.industry Laser cutting Biomedical Engineering 02 engineering and technology Fresnel equations 021001 nanoscience & nanotechnology Laser 01 natural sciences Beam parameter product Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Wavelength Temperature gradient Optics law 0103 physical sciences Laser power scaling Laser beam quality 0210 nano-technology business Instrumentation |
| Zdroj: | Journal of Laser Applications. 29:022209 |
| ISSN: | 1938-1387 1042-346X |
| DOI: | 10.2351/1.4983264 |
| Popis: | Laser cutting of thick metal workpieces requires the use of low operating speeds which, however, will have an influence on the cut quality following the used laser wavelength. In this study, we develop a model which takes into account the Fresnel coefficients in order to determine the local laser absorbed energy as a function of the beam incidence angle on the surface workpiece. The deposited laser energy occurs on the metal/air interface which evolution is tracked by the volume-of-fluid multiphase model. In the simulation, in order to find the difference between the patterns obtained on the kerf walls when different laser wavelengths are used, an important number of cells must be used at the regions of interest, which are characterized by high gradients, but a larger number of cells will have the consequence to complete the calculation with much less computer time consumption. Therefore, a gradient adaption method was implemented in order to control the number of cells, by multiplying or reducing them wh... |
| Databáze: | OpenAIRE |
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