Limitations of the M-K Based Forming Limit Diagrams

Using a rate dependent Taylor type crystal plasticity formulation, the limitations of Marciniak-Kuczynski (M-K) approach to numerically simulate the Forming Limit Diagrams (FLDs) were studied. Three uniaxial stress-strain curves with three different post-necking hardening behaviors were generated using crystal plasticity formulation. These curves were constructed based on the real tension test data available for AA5754 aluminum. In the first …