한국소성가공학회:학술대회논문집 (Proceedings of the Korean Society for Technology of Plasticity Conference)
- 한국소성가공학회 1994년도 추계학술대회 논문집
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- Pages.55-63
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- 1994
초소성재료의 압력성형에 관한 삼차원 유한요소해석
3-D Finite Element Analysis of Superplastic Blow Forming
- Lee, Ki-Seok (Department of Precision Engineering and Mechatronics Korea Advanced Institute of Science and Technology) ;
- Huh, Hoon (Department of Precision Engineering and Mechatronics Korea Advanced Institute of Science and Technology)
- 발행 : 1994.10.01
초록
The analysis of superplastic sheet forming process is studied by the use of the finite element method using a convected coordinate system and a skew boundary condition. In the formulation, the large inelastic behavior of the superplastic material is described as incompressible, nonlinear, viscous flow. The formulation is then approximated to the finite dimensional space with the use of membrane elements, which results in algebraic linear equations. In addition to the finite element formulation, a pressure cycle control algorithm is combined in the analysis for optimization of the forming time, which deals with the maximization of the strain rate sensitivity, the protection of the thickness reduction, the consistency of the desired strain rate and improvement of formability.
키워드