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A calibration of Gurson-Tvergaard- Needleman micromechanical model of ductile fracture
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SYSNO ASEP 0421044 Document Type K - Proceedings Paper (Czech conf.) R&D Document Type Conference Paper Title A calibration of Gurson-Tvergaard- Needleman micromechanical model of ductile fracture Author(s) Stratil, Luděk (UFM-A) ORCID
Hadraba, Hynek (UFM-A) RID, ORCID
Šiška, Filip (UFM-A) RID, ORCID
Dlouhý, Ivo (UFM-A) RID, ORCIDNumber of authors 4 Source Title 19th Interational Conference Engineering mechanics 2013. - Praha : Institute of Thermomechanics AS CR, v. v. i, 2013 - ISBN 978-80-87012-47-5
S. 560-566Number of pages 7 s. Publication form Medium - C Action Engineering mechanics 2013 Event date 13.05.2013-16.05.2013 VEvent location Svratka Country CZ - Czech Republic Event type EUR Language eng - English Country CZ - Czech Republic Keywords ductile fracture ; GTN model ; void nucleation ; MLR model ; Eurofer97 Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects EE2.3.20.0197 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFM-A - RVO:68081723 Annotation Fracture mechanics characteristics of ductile fracture often depend on geometry and size of specimens. A micromechanical modelling of material damage proposes a tool for treatment of geometry and size effects in fracture mechanics. Application of micromechanical model for certain materiál requires a calibration of model‘s parameters. This contribution presents the calibration procedure of Gurson-Tvergaard-Needleman model of ductile fracture for Eurofer97 steel. The identification of ductile damage of the steel and its tensile properties at various level of stress triaxiality by testing smooth and notched bars were determined in the previous study. The calibration procedure was performed by hybrid method as a combination of FEA simulations of tensile tests and fractography analyses. The Gurson-Tvergaard-Needleman model performance is greatly influenced by true stress-true strain curve of the material. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2014
Number of the records: 1