레이저의 편광을 고려한 키홀 거동 해석에 관한 연구 A Study on the Keyhole Dynamics According to Polarization of Laser

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Three-dimensional transient keyhole profile is numerically analyzed for the case of stationary laser keyhole welding. Volume of fluid (VOF) method is adopted to track the free surface of molten metal based on the three governing equations which are continuity, momentum and energy equations. Multiple reflections of laser beam at the keyhole walls are also included in analysis through a real-time ray tracing technique. In this simulation, especially, polarization of laser is considered as an energy absorption mechanism following the Fresnel reflection theory. Both cases of linearly and circularly polarized beam are simulated and compared. The results show that the theoretically generated keyhole is asymmetrically stretched along the direction of polarization which is already observed experimentally before.
Publisher
대한기계학회
Issue Date
2007-05
Language
KOR
Citation

대한기계학회 2007년도 춘계학술대회, pp.254 - 258

URI
http://hdl.handle.net/10203/162355
Appears in Collection
ME-Conference Papers(학술회의논문)
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