Project A4: Developing new tool concepts for deep drawing: Simulation und process management

Person in Charge: Dipl.-Ing. Maria Baiker

Motivation and aim:
While at the beginning of the process chain during the production of the semi finished part the investigations focus on the development of the microstructure, the macroscopic behavior of the material has to be modeled during the forming process. To be able to simulate even complex forming processes fast material models are necessary. For that reason in this work the switch between micro- and macroscale is performed by crystal plasticity based FEM simulations on unity cells. With the determined knowledge about the macroscopic material behavior an adequate phenomenological material model is chosen to simulate the forming process and selected material parameters are determined. The deep drawing experiments and simulations in this work focus on the influence of process parameters.

Research

Results

Crystal plasticity based FEM-simulations on unit cells to investigate the macroscopic behavior of the heat treated material
Phenomenological material model for forming simulations
Deep drawing experiments: investigate the influence of different parameters like anisotropy, blankholder force, …
Experiments to determine friction coefficients
Deep drawing simulations

Crystal plasticity based simulations:

Determination the shape of the initial yield surface
Determination of the Lankford Coefficients
Hardening behavior at large strains

Forming simulation with phenomenological material model:

Comparison with experiment: development of strains, run of the punch force, earing profile of cylindrical cups
Representation of the influence of the blankholder force, lubrication, drawing beads, etc