Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Prediction of Distribution of Solid Volume Fraction in Semi-Solid Materials Based on Mixture Theory

혼합이론에 근거한 반용융 재료의 고상률 분포 예측

  • 윤종훈 (한국과학기술원 기계공학과) ;
  • 김낙수 (서강대학교 기계공학과) ;
  • 임용택 (한국과학기술원 기계공학과)
  • Published : 1999.08.01
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Abstract

It is more appropriate to treat that the semi-solid mixture as a single phase material that obeys incompressibility in the global sense and to analyze the liquid flow only locally than the approach based on compressible yield criteria. In the present study, a numerical algorithm of updating the solid volume fraction based on mixture theory has been developed. Finite element analysis of simple upsetting was carried out using the proposed algorithm to investigate the degree of macro-segregation according to friction conditions and compressive strain rates under the isothermal condition. The simulation results were compared to experimental results available in reference to test the validity of the currently proposed algorithm. Since the comparison results show a good agreement it is construed that the proposed algorithm can contribute to the development of numerical analysis of determining the solid volume fraction semi-solid processing.

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References

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