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  Volume 3, Number 2, April 2018, pages 133-146
DOI: http://dx.doi.org/10.12989/acd.2018.3.2.133
 


Numerical simulation of material damage for structural steels S235JR and S355J2G3
Pawel G. Kossakowski and Wiktor Wciślik

 
Abstract
    The paper discusses numerical analysis of tensile notched specimens with the use of Gurson – Tvergaard – Needleman (GTN) material model. The analysis concerned S235JR and S355J2G3 steel grades, subjected to medium stress state triaxiality ratio, amounting 0.739. A complete procedure for FEM model preparation was described, paying special attention to the issue of determining material constants in the GTN model. An example of critical void volume fraction (fc) experimental determination procedure was presented. Finally, the results of numerical analyses were discussed, indicating the differences between steel grades under investigation.
 
Key Words
    steel; static tensile tests; Gurson–Tvergaard–Needleman model; determination of model parameters; numerical simulation
 
Address
Pawel G. Kossakowski and Wiktor Wciślik: Department of Strength of Materials and Concrete Structures, Kielce University of Technology,
Al. Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland
 

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