The Determination of Initial Blank Shape by Using the One-Step FEM

J. Ocean Eng. Technol. 1999;13(3):21-28.

Jung, Dong-Won;Lee, Sang-Je;

One-Step FEM을 이용한 초기 블랭크 형상 결정에 관한 연구

정동원;이상제;

제주대학교 기계공학과;제주대학교 기계공학과 대학원;

Keywords: One-Step FEM, Sheet Metal Forming Process, Initial Blank Shape, Inverse Method, Henky's Deformation Theory, Hill's Anisotropic Yield Criterion

핵심용어: 한 단계 유한요소해석, 박판금속 성형, 초기 블랭크 형상, 역해석방법, Henky의 변형이론, Hill의 비방성 항복 조건

Abstract

In this paper, a finite element method for the determination of initial blank shape in sheet metal forming process will be introduced. The initial blank shape is determined by the only one step from the final to the initial blank. The used finite element inverse method adopted Henky's deformation theory, Hill's anisotropic yield criterion and simplified boundary conditions. Based on this theory. a three-dimensional membrane finite element code was developed. The developed code will be applied to several sheet metal forming examples for the demonstration of its validity.