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자유표면변형을 고려한 저에너지밀도 및 고에너지밀도 레이저 용접공정 통합 해석

Title
자유표면변형을 고려한 저에너지밀도 및 고에너지밀도 레이저 용접공정 통합 해석
Other Titles
A Unified Analysis of Low - Power and High - Power Density Laser Welding Processes with Evolution of Free Surface
Author
김우승
Issue Date
2005-10
Publisher
대한기계학회
Citation
대한기계학회논문집 B, v. 29, No. 10, Page. 1,111 - 1,118
Abstract
In this study, a unified numerical investigation has been performed on the evolution of weld pool, key-hole geometry during low-power, high-power density laser welding. Unsteady phase-change heat transfer, fluid flow with the surface tension are examined. The one-dimensional vaporization model is introduced to model the overheated surface temperature, recoil pressure during high-power density laser welding. It is shown that Marangoni convection in the weld pool is dominant at low-power density laser welding,, the keyhole with thin liquid layer, the hump are visible at high-power density laser welding. It is also shown that the transition from conduction welding to penetration welding for iron plate exists when the laser power density is about 10^6W/㎠ .
URI
http://www.dbpia.co.kr/journal/articleDetail?nodeId=NODE00643052&language=ko_KRhttp://repository.hanyang.ac.kr/handle/20.500.11754/111988
ISSN
1226-4881
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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