Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Mismatching Refinement with Domain Decomposition and Its Application to the Finite Element Analysis of the Extrusion Process

영역분할에 의한 격자세분화 기법 및 압출공정의 유한요소해석에의 적용

  • 박근 (삼성전기(주) 금형개발실) ;
  • 양동열 (한국과학기술원 기계공학과)
  • Published : 1999.06.01
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Abstract

The rigid-plastic finite element analysis requires a large amount of computation time due to its non-linearity. For economic computation, mismatching refinement, and efficient domain decomposition method with different mesh density for each sub domain, is developed. A modified velocity alternating scheme for the interface treatment is proposed in order to obtain good convergence and accuracy. As a numerical example, the axisymmetric extrusion process is analyzed. The results are discussed for the various velocity update schemes form the viewpoint of convergence and accuracy. The three-dimen-sional extrusion process with rectangular section is analyzed in order to verify the effectiveness of the proposed method. Comparing the results with those of the conventional method of full region analysis, the accuracy and the computational efficiency of the proposed method are then discussed.

Keywords

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