The analysis of influence of Tvergaard's parameters on S235JR steel response in high stress triaxiality

The influence of Tvergaard's parameters q_i of Gurson-Tvergaard-Needleman (GTN) material model on S235JR steel response was considered in the study. The analysis concerns the strength curves simulated numerically for notched tensile elements under static tension in complex stress state defined by high initial stress triaxiality σ_m/σ_e > 1. Typical and material-dependent values of Tvergaard's parameters q_i were examined. The influence of the Tvergaard's parameters q_i on material response was noticed at the failure range for S235JR steel in the case of high stress triaxiality.