Publication detail
A calibration of Gurson-Tvergaard-Needleman micromechanical model of ductile fracture
STRATIL, L. HADRABA, H. ŠIŠKA, F. DLOUHÝ, I.
English title
A calibration of Gurson-Tvergaard-Needleman micromechanical model of ductile fracture
Type
Paper in proceedings (conference paper)
Language
en
Original 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 material requires a calibration of model 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. It was verified that derivation of true stress-true strain curve of the material by using of multiple linear regression model proposed by Mirone is very suitable.
Keywords in English
ductile fracture, GTN model, void nucleation, MLR model, Eurofer97
Released
2013-05-13
Publisher
Institute of Thermomechanics AS CR, v. v. i.
Location
Praha
ISBN
978-80-87012-47-5
Book
Engineering mechanics 2013
Pages from–to
560–566
Pages count
7
BIBTEX
@inproceedings{BUT101132,
author="Luděk {Stratil} and Hynek {Hadraba} and Filip {Šiška} and Ivo {Dlouhý}",
title="A calibration of Gurson-Tvergaard-Needleman micromechanical model of ductile fracture",
booktitle="Engineering mechanics 2013",
year="2013",
pages="560--566",
publisher="Institute of Thermomechanics AS CR, v. v. i.",
address="Praha",
isbn="978-80-87012-47-5"
}