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유한요소법을 이용한 가변스테레치성형 공정변수와 성형오차의 상관관계 연구
서영호(Y. H. Seo),허성찬(S. C. Heo),강범수(B. S. Kang),김정(J. Kim) 한국소성가공학회 2010 한국소성가공학회 학술대회 논문집 Vol.2010 No.10
In this study, a correlation analysis between a process variable and shape error in a flexible stretch forming is conducted using finite element method. The forming variables which affect to the shape error are punch size, objective curvature radius and elastic pad thickness. Numerical simulations for calculating of the shape error are carried out by factorial design. The shape error is calculated and the correlation analysis is also performed according to width and tensile directions. Consequently, the correlation coefficient is deducted and it describes that the shape error is in proportional to the punch size and is in inverse to the objective curvature radius and the elastic pad thickness.