Model Integration for Process Simulation
|Funding:||German Research Foundation (DFG)|
|Project:||CRC/TRR 188 • Subproject S01|
|Contact:||Alexander Schowtjak M. Sc.|
Numerical simulations are used in order to optimally design forming processes in the CRC/TRR 188.
The prediction of damage in the sense of void fractions is of special importance for the product performance. In order to predict the damage realistically, a methodology for model calibration has been developed based on experimentally measured void fractions. While a similar procedure for the Gurson-Tvergaard-Needleman-model is already established, this strategy has been extended to be generally applicable.
The figure depicts the simulation results with the Lemaitre model for a classical parameter identification process compared to the newly developed strategy. While there is barely any difference between those curves (see Figure a), there are large differences in the void evolution D of an air bending process (see Figure b). The results for the strategy based on void measurements depict the experimental data well, whereas there are large differences for the conventional strategy.