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The Benefit of True Fracture Strain on Material Model Parametrization

By means of numerical simulation, cars have become much saver and lighter at the same time (when focusing on chassis and body in white). The ongoing improvement of steel grades for the automotive sector has additionally supported this development. Nowadays, the last percentages of improvements can only be obtained by using the latest steel grades and a very realistic modeling of their strain hardening and failure behavior. In case of hot rolled steels with a thickness of 4.0 mm, this leads more and more often to a modeling based on solid finite elements. Focusing hot rolled steels with high yield strength and high formability, there is in addition the need for a modeling of anisotropic hardening.