한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제18권9호
  • /
  • Pages.156-164
  • /
  • 2001
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  • 1225-9071(pISSN)
  • /
  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
권호 표지

저고상율 소재의 유동 및 응고현상을 고려한 레올로지 성형공정해석

Process Analysis for Rheology Forming Considering Flow and Solidification Phenomena in Lower Solid Fraction

  • 정영진 (부산대학교 정밀기계공학과) ;
  • 조호상 (부산대학교 정밀기계공학과) ;
  • 강충길 (부산대학교 기계공학과)
  • Jung, Young-Jin (Dept.of Precision Mechanical Engineering, Busan National University) ;
  • Cho, Ho-Sang (Dept.of Precision Mechanical Engineering, Busan National University) ;
  • Kang, Chung-Gil (Dept.of Mechanical Engineering, Busan National University)
  • 발행 : 2001.09.01
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초록

Two-dimensional solidification analysis during rheology forming process of semi-solid aluminum alloy has been studied. Two-phase fluid flow model to investigate the velocity field and temperature distribution is proposed. The proposed mathematical model is applied to the die shape of the two types. To calculate the velocity and temperature fields during rheology forming process, the earth governing equation correspondent to the liquid and solid region are adapted. Therefore, each numerical models considering the solid and liquid region existing within the semi-solid material have been developed to predict the deflect of rheology forming gnarls. The Arbitrary Boundary Maker And Cell (ABMAC) method is employed to solve the two-phase flow model of the Navier-Stokes equation. Theoretical model on the basis of the two-phase flow model is the mixture rule of solid and liquid phases. This approach is based on the liquid and solid viscosity. The liquid viscosity is pure liquid state value, however solid viscosity is considered as a function of the shear rate, solid fraction and power law curves.

키워드

참고문헌

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