Remapping algorithms: application to trimming operations in sheet metal forming

10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

Neto, D.M.^1 ; Diogo, C.M.A.^1 ; Neves, T.F.^1 ; Oliveira, M.C.^1 ; Alves, J.L.^2 ; Menezes, L.F.^1

CEMUC, Department of Mechanical Engineering, University of Coimbra, Polo II, Rua Luís Reis Santos, Coimbra

3030-788, Portugal^1

CMEMS, Department of Mechanical Engineering, University of Minho, Campus de Azurém, Guimarães

4800-058, Portugal^2

关键词: Dual Kriging interpolation;    Finite element meshes;    Finite element solver;    In-house codes;    Remapping algorithms;    Split ring tests;    State variables;    Trimming operations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032046/pdf
DOI  :  10.1088/1742-6596/734/3/032046

来源: IOP

【 摘 要 】

Most of sheet metal forming processes comprise intermediate trimming operations to remove superfluous material. These operations are required for subsequent forming operations. On the other hand, the springback is strongly influenced by the trimming operations that change the part stiffness and the stress field. From the numerical point of view, this involves the geometrical trimming of the finite element mesh and subsequent remapping of the state variables. This study presents a remapping method based on Dual Kriging interpolation, specifically developed for hexahedral finite elements, which has been implemented in DD3TRIM in-house code. Its performance is compared with the one of the Incremental Volumetric Remapping method, using the split-ring test to highlight their advantages and limitations. The numerical simulation of the forming processes is performed with DD3IMP finite element solver.