한국주조공학회지 (Journal of Korea Foundry Society)
- 제18권6호
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- Pages.555-562
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- 1998
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- 1598-706X(pISSN)
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- 2288-8381(eISSN)
유동한계 고상율법을 이용한 수축공 생성의 수치해석
Numerical Analysis of Shrinkage Cavity Formation using the Modified Fluid Critical Solid Fraction Method
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Lee, Jae-Kyung
(Advanced Technology Engineering Service, Ltd.) ;
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Choi, Jeong-Kil
(Korea Institute of Industrial Technology) ;
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Hong, Chun-Pyo
(Dept. of Metallurgical Eng., Yonsei University)
- 발행 : 1998.12.20
초록
Modified fluid critical solid fraction method was utilized as a prediction parameter to describe the shrinkage formation including the position, shape and amount of shrinkage cavities. A numerical scheme was implemented adapting this method for the evaluation of solidification defects in various casting processes. In the present numerical code, the form of shrinkage cavity can be simultaneously determined when an isolated loop is predicted to occur by the fluid critical solid fraction method. An auxiliary parameter, shrinkage potential, was also used in order to calculate the amount of residual liquid during solidification. Solidification analysis was carried out for the validation of the present scheme. It was shown that the calculated results were in good agreement with those of practical casting runs in all of the casting processes envolved in the present research. It may be concluded that the present program successfully predicts the detailed shrinkage formation behavior without the consideration of interdendritic fluid flow analysis.
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