Modeling of ductile tearing for RAFM steel Eurofer97

0435433 - ÚFM 2015 RIV GB eng C - Konferenční příspěvek (zahraniční konf.)
Stratil, Luděk - Šiška, Filip - Hadraba, Hynek - Dlouhý, Ivo
Modeling of ductile tearing for RAFM steel Eurofer97.
20th European Conference on Fracture. Amsterdam: Elsevier, 2014 - (Zhang, Z.), s. 1155-1160. ISSN 2211-8128.
[European Conference on Fracture /20./. Trondheim (NO), 30.06.2014-04.07.2014]
Grant CEP: GA MŠMT EE2.3.20.0197; GA MŠMT(CZ) ED1.1.00/02.0068
Institucionální podpora: RVO:68081723
Klíčová slova: Eurofer97 * ductile fracture * J-R curve * KLST specimen * GTN model
Kód oboru RIV: JL - Únava materiálu a lomová mechanika

The contribution describes experiments and numerical modelling performed to deal with ductile tearing for RAFM steel Eurofer97. Based on results of tensile testing and results of FEA a micromechanical model of ductile fracture Gurson-Tvergaard-Needleman (GTN) was calibrated. This model was then applied for simulation of measured J-R curve. To successfully simulate J-R curve by GTN model, crack length increment was separated into increment created by crack tip blunting (stretch width zone increment) and by ductile tearing itself. J-R curve corrected to crack tip blunting was satisfactory described by GTN model choosing suitable element size in the region of crack propagation.
Trvalý link: http://hdl.handle.net/11104/0240030