Numerical modeling of crack initiation and propagation processes in various specimen’s types using the GTN material damage model

Problematic. A combination of experimental and computational methods for studying the processes crack initiation propagation in various specimen’s types is used to determine mechanical properties materials, as well improve accuracy assessing strength durability structural elements. Research objective. Determination parameters Gurson-Tvergaard-Needleman (GTN) material damage model based on numerical modeling results under loading steel 22K using finite element method. Realization technique. Using method, cracks nucleation cylindrical specimens uniaxial tension, Charpy dynamic loading, also CT quasi-static was carried out GTN model. The research. By comparing results, full set determined. stress state tip area kinetics its static were estimated. Conclusions. with parameter values determined from experiments, can be simulation both types,