강소성 유한요소해석과 반응표면분석법을 이용한 박판성형공정에서의 드로우 비드력 최적설계

Optimum Design of Draw-bead Force in Sheet Metal Stamping using Rigid-plastic FEM and Responses Surface Methodology

Design optimization is performed to calculated the draw-bead force for satisfying the design re-quirements. For an analysis tool a rigid-plastic finite element method with modified membrane element is adopted. response surface methodology is utilized for constructing the approximation surface for the optimum searching of draw bead force in sheet metal forming process. the algorithm developed is ap-plied to a design of the draw bead forces in a deep drawing process. The results show that the design of process parameters is applicable in complex metal forming analysis. It is also noted that the present algo-rithm enhances the stable optimum solution with small times of optimization iteration.