Original title: A calibration of Gurson-Tvergaard- Needleman micromechanical model of ductile fracture
Authors: Stratil, Luděk ; Hadraba, Hynek ; Šiška, Filip ; Dlouhý, Ivo
Document type: Papers
Conference/Event: Engineering mechanics 2013, Svratka (CZ), 2013-05-13 / 2013-05-16
Year: 2013
Language: eng
Abstract: 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.
Keywords: ductile fracture; Eurofer97; GTN model; MLR model; void nucleation
Project no.: EE2.3.20.0197
Funding provider: GA MŠk
Host item entry: 19th Interational Conference Engineering mechanics 2013, ISBN 978-80-87012-47-5

Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0228248

Permalink: http://www.nusl.cz/ntk/nusl-166317


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