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Microvoids Evolution in S235JR Steel Subjected to Multi-Axial Stress State

Kossakowski P. G., Trąmpczyński W.

Engineering Transactions

2012

Vol. 60, iss. 4

287-314

The article presents the results of the experimental and numerical analysis of microvoids evolution in elements made of S235JR steel under multi-axial stress state. The numerical simulations were based on the modified Gurson-Tvergaard-Needleman (GTN) material model, taking into account the impact of microstructural defects on the material strength. Two approaches were used, assuming a global and local damage of the structure of S235JR steel. In both cases, the evolution of microdamage (voids) and their impact on the strength and failure of the material were analysed. The results of numerical simulations were similar to the results obtained during microstructural examinations.