강-점소성 ALE 유한 요소 수식화에 근거한 사각형 형재의 평금형 등온 압출에 대한 3차원 해석A Three-Dimensional Rigid-Viscoplastic Finite Element Analysis of Isothermal Square Die Extrusion of a Square Section Based on ALE Description
In the finite element analysis of metal forming processes the updated Lagrangian approach has been widely and effectively used to simulate the non-steady state problems. however some difficulties have arisen from abrupt flow change as in extrusion through square dies. In the present work an ALE(arbitrary Lagrangian-Euleria) finite element formulation for deforma-tion analysis are presented fro rigid-viscoplastic materials. The developed finite element program is applied to the isothermal analysis of square die extrusion of a square section. The computational results are compared with those by the updated Lagrangian finite element analysis.