A Study on the Thermal Stresses Analysis of the Flat Mould

평평한 금형(金型)의 열응력(熱應力)에 관한 연구(硏究)

  • 민수홍 (인하대학교 공과대학 기계공학과) ;
  • 구본권 (서울산업대학) ;
  • 김옥삼 (인하대학교 공과대학 기계공학과)
  • Published : 1991.06.20

Abstract

It is known that the analysis of thermal stresses is substantially important in optimal design of casting mould. In this paper unsteady state thermal stresses generated in ingot and mould during the solidification process are analyzed by the two dimensional thermal elasto-plastic analysis. Distribution of temperature and stress of the mould is calculated using the finite element method and compared with experimental result. The significant results obtained in this study are as follows. At the early stage of the casting process, abrupt temperature change was shown in the vicinity of the inner surface of the mould. The largest temperature gradient is occurred at the corner of the mould. In the thermal stress analysis, compressible stress occurred in the inside wall of the mould where as tensile stress on outside wall. Smaller thermal stress is observed at the rounded corner. It is also observed that the shown is influenced by the thickness of the wall. A fairly good coincidence is found between analytical and experimental results, showing that the proposed analytical methodology is reliable.

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