Numerical Study on Sheet Metal Forming Analysis Using the One-Step Forming

J. Ocean Eng. Technol. 1999;13(2):11-17.

Jeong, Dong-Won;Lee, Sang-Je;Kim, Gwang-Hui;

One-Step Forming을 이용한 박판성형 해석에 관한 연구

정동원;이상제;김광희;

제주대학교 기계공학과;제주대학교 대학원;부경대학교 기계${cdot}$자동차공학부;

Keywords: One-Step Forming, FEM, Trouble-Shooting Process, Deformation Theory, Upper Bound Theorem

핵심용어: 단단계 성형, 유한요소법, 문제조정 과정, 변형이론, 상부 경계 이론

Abstract

The objective of this paper is to introduce very fast but still stable solution using finite element procedures, and it has been used in an iterative mode for product design applications. A lot of numerical techniques have been developed to deal with the material, geometric and boundary condition non-linearities occurred in the stamping process. One of them, the One-Step FEM is very efficient and useful tool for a design and trouble-shooting in various stamping processes. In this method, the mathod, the material is assumed to deform directly from the initial flat blank to the final configuration without any intermediate steps. The formulation is based on the deformation theory of plasticity and the upper bound theorem. As a result of the calculations, the initial blank shape is obtained, together with the material flow, strains and thickness distribution in the part.