Determination of the bead geometry considering formability and stiffness effect using generalized forming limit concept (GFLC)

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

Cha, Wan-Gi^1 ; Vogel, Sabrina^2 ; Bursac, Nikola^2 ; Albers, Albert^2 ; Volk, Wolfram^1

Institute of Metal Forming and Casting, Technische Universität München, Walther-Meißner-Str. 4, Garching

85748, Germany^1

Institute of Product Engineering, Karlsruhe Institute of Technology, Kaiserstr. 10, Karlsruhe

76131, Germany^2

关键词: Experimental test;    Manufacturing process;    Metal thickness;    Nonlinear strain;    Numeric optimization;    Optimization algorithms;    Sheet metal parts;    Weight reduction;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032077/pdf
DOI  :  10.1088/1742-6596/734/3/032077

来源: IOP

【 摘 要 】

Beads are used in deep drawn sheet metal parts for increasing the part stiffness. Thus, reductions of sheet metal thickness and consequently weight reduction can be reached. Style guides for types and positions of beads exist, which are often applied. However, higher stiffness effects can be realized using numeric optimization. The optimization algorithm considers the two-stepped manufacturing process consisting of deep drawing and bead stamping. The formability in both manufacturing steps represents a limiting factor. Considering nonlinear strain paths using generalized forming limit concept (GFLC), acceptable geometries will be determined in simulation. Among them, the efficient geometry which has higher stiffness effects will be selected in numerical and experimental tests. These will be integrated in the optimization algorithm.