Original title: Modelling of ductile fracture for sub-sized three-point-bend geometry
Authors: Stratil, Luděk ; Hadraba, Hynek ; Kozák, Vladislav ; Dlouhý, Ivo
Document type: Papers
Conference/Event: Engineering Mechanics 2012 /18./, Svratka (CZ), 2012-05-14 / 2012-05-17
Year: 2012
Language: eng
Abstract: The contribution deals with the simulation of R-curve using complete Gurson model of ductile fracture. The R-curve was experimentally determined for a Eurofer97 steel on sub-sized three-point-bend geometry in previous study. To apply complete Gurson model the parameters describing the voids´ behaviour and characteristic length parameter need to be determined. The nucleation parameters were identified by single specimen method of smooth tensile test specimen and from metallographic examination of fracture micro-mechanism. The characteristic length parameter was derived by fitting load versus deflection curves of sub-sized specimens. The simulations of the tests were carried out by software ABAQUS in Standard and Explicit modules. The identification was supported by parametric studies. Comparing experimental and simulated R-curve the ductile tearing was not successfully achieved. Insufficient calibrated parameters as a result non-uniqueness problem of single specimen method were found.
Keywords: complete Gurson model; Eurofer97; R-curve; single specimen approach
Project no.: GD106/09/H035 (CEP), GAP107/10/0361 (CEP)
Funding provider: GA ČR, GA ČR
Host item entry: Engineering Mechanics 2012, ISBN 978-80-86246-40-6

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/11104/0215259

Permalink: http://www.nusl.cz/ntk/nusl-135484


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Research > Institutes ASCR > Institute of Physics of Materials
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