A Three-Dimensional Rigid-Viscoplastic Finite Element Analysis of square die extrusion based on ALE description

강-점소성 ALE 유한요소 수식화에 근거한 3차원 평금형 형재 압출의 해석

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, a ALE(arbitrary Lagrangian-Eulerian) finite element formulation for deformation analysis are presented for rigid viscoplastic materials. The developed finite element program is applied to the analysis of square die extrusion of a square section. The computational results are compared with those from the updated Lagrangian finite element analysis.