자유표면변형을 고려한 저에너지밀도 레이저 용접공정 해석

다국어 초록 (Multilingual Abstract)

In this study, numerical investigation has been performed on the evolution of weld pool geometry with<br/>
moving free surface during low-energy density laser welding process. The free surface elevates near the weld<br/>
pool edge if ∂σ /dT is dominantly negative. On the contrary, the free surface rise at the center of weld pool<br/>
in case of mainly positive ∂σ /dT . The predicted weld pool width and depth with moving free surface are<br/>
5∼15% greater than those with flat weld pool surface. It is considered that weld pool surface oscillation<br/>
during melting process augments convective heat transfer rate in the weld pool.

목차 (Table of Contents)

• Abstract
  
• 1.서론
  
• 2.수치해석방법
  
• 3.결과 및 고찰
  
• 4.결론
  
• 후기
  
• 참고문헌