Remeshing for metal forming simulations—Part I: Two-dimensional quadrilateral remeshing

International Journal for Numerical Methods in Engineering, John Wiley & Sons, Ltd., Vol 53, Num 11, pp.2463 - 2500, April 2002

MESHING
RESEARCH
CORNER

Jae-Seung Cheon and Yong-Taek Im
Computer Aided Materials Processing Laboratory, Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, ME3227 373-1 Kusong-dong, Yusong-gu, Taejon 305-701, South Korea

Abstract

In this paper, a general framework of practical two-dimensional quadrilateral remeshing, which includes the determination of remeshing time, automatic quadrilateral mesh generation, and data transfer process, will be formulated. In particular, the current work contains new algorithms of mesh density specification according to the distribution of effective strain-rate gradients, mesh density smoothing by fast Fourier transform (FFT) and low-pass filtering techniques, coarsening it by node placement scheme, and a modified Laplacian mesh smoothing technique. The efficiency of the developed remeshing scheme was tested through three practical two-dimensional metal forming simulations. The results clearly indicate that the algorithms proposed in this study make it possible to simulate two-dimensional metal forming problems efficiently and automatically.