Abstract
The present study proposes a parameter identification and calibration strategy for a specific non-local GTN-model, which has been developed to circumvent spurious mesh dependency during simulation of ductile failure. The parameter calibration strategy is applied to an experimental database of a pressure vessel steel tested at moderate to high stress triaxialities. Relevant parameters of the non-local GTN-model can be identified using simulated/experimental crack growth resistance curves determined by a fracture mechanics test (Mode I loading). In addition, only results of a smooth tensile test are utilized in order to identify an appropriate strain hardening law. Based on this input information, the failure behavior of smooth and notched tensile specimens as well as miniaturized deep drawing tests is predicted by finite element simulations. A fairly good agreement with experiments is obtained, which validates the feasibility of the suggested approach.
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